* [syzbot] Test on mainline
@ 2023-11-16 14:03 syzbot
2023-11-17 1:01 ` [syzbot] [PATCH] test uaf in sco_sock_timeout syzbot
` (16 more replies)
0 siblings, 17 replies; 40+ messages in thread
From: syzbot @ 2023-11-16 14:03 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com.
***
Subject: Test on mainline
Author: yuran.pereira@hotmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
^ permalink raw reply [flat|nested] 40+ messages in thread* Re: [syzbot] [PATCH] test uaf in sco_sock_timeout 2023-11-16 14:03 [syzbot] Test on mainline syzbot @ 2023-11-17 1:01 ` syzbot 2023-11-18 3:25 ` [syzbot] [PATCH] Test " syzbot ` (15 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-17 1:01 UTC (permalink / raw) To: linux-kernel For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [PATCH] test uaf in sco_sock_timeout Author: lizhi.xu@windriver.com #syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git 8de1e7afcc1c diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index c736186aba26..515b52e14b5f 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -415,6 +415,8 @@ static void sco_sock_cleanup_listen(struct sock *parent) */ static void sco_sock_kill(struct sock *sk) { + struct sco_conn *conn = container_of(sk, struct sco_conn, sk); + if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) return; @@ -423,6 +425,9 @@ static void sco_sock_kill(struct sock *sk) /* Kill poor orphan */ bt_sock_unlink(&sco_sk_list, sk); sock_set_flag(sk, SOCK_DEAD); + sco_conn_lock(conn); + conn->sk = NULL; + sco_conn_unlock(conn); sock_put(sk); } ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] [PATCH] Test uaf in sco_sock_timeout 2023-11-16 14:03 [syzbot] Test on mainline syzbot 2023-11-17 1:01 ` [syzbot] [PATCH] test uaf in sco_sock_timeout syzbot @ 2023-11-18 3:25 ` syzbot 2023-12-06 3:58 ` [syzbot] [bluetooth?] KASAN: slab-use-after-free Write " syzbot ` (14 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-18 3:25 UTC (permalink / raw) To: linux-kernel For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [PATCH] Test uaf in sco_sock_timeout Author: eadavis@qq.com please test 8de1e7afcc1c #syz test https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git 8de1e7afcc1c diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index c736186aba26..c05fb9d41a63 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -300,7 +300,8 @@ static int sco_connect(struct sock *sk) unlock: hci_dev_unlock(hdev); - hci_dev_put(hdev); + if (err) + hci_dev_put(hdev); return err; } ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout 2023-11-16 14:03 [syzbot] Test on mainline syzbot 2023-11-17 1:01 ` [syzbot] [PATCH] test uaf in sco_sock_timeout syzbot 2023-11-18 3:25 ` [syzbot] [PATCH] Test " syzbot @ 2023-12-06 3:58 ` syzbot 2024-10-01 19:50 ` [syzbot] Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync syzbot ` (13 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-12-06 3:58 UTC (permalink / raw) To: davem, eadavis, edumazet, hdanton, johan.hedberg, kuba, linux-bluetooth, linux-kernel, lizhi.xu, luiz.dentz, luiz.von.dentz, marcel, netdev, pabeni, syzkaller-bugs, yuran.pereira syzbot has bisected this issue to: commit 9a8ec9e8ebb5a7c0cfbce2d6b4a6b67b2b78e8f3 Author: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Date: Thu Mar 30 21:15:50 2023 +0000 Bluetooth: SCO: Fix possible circular locking dependency on sco_connect_cfm bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=179a65d2e80000 start commit: bee0e7762ad2 Merge tag 'for-linus-iommufd' of git://git.ke.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=145a65d2e80000 console output: https://syzkaller.appspot.com/x/log.txt?x=105a65d2e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=b50bd31249191be8 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1504504ae80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14685f54e80000 Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com Fixes: 9a8ec9e8ebb5 ("Bluetooth: SCO: Fix possible circular locking dependency on sco_connect_cfm") For information about bisection process see: https://goo.gl/tpsmEJ#bisection ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (2 preceding siblings ...) 2023-12-06 3:58 ` [syzbot] [bluetooth?] KASAN: slab-use-after-free Write " syzbot @ 2024-10-01 19:50 ` syzbot 2024-10-02 18:27 ` [syzbot] Re: [PATCH v2] " syzbot ` (12 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-01 19:50 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Tue, Oct 1, 2024 at 3:48 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > This makes use of disable_delayed_work_sync instead > cancel_delayed_work_sync as it not only cancel the ongoing work but also > disables new submit which is disarable since the object holding the work > is about to be freed. > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > --- > net/bluetooth/sco.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > index a5ac160c592e..f0604d7834df 100644 > --- a/net/bluetooth/sco.c > +++ b/net/bluetooth/sco.c > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > } > > /* Ensure no more work items will run before freeing conn. */ > - cancel_delayed_work_sync(&conn->timeout_work); > + disable_delayed_work_sync(&conn->timeout_work); > > hcon->sco_data = NULL; > kfree(conn); > -- > 2.46.1 > -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v2] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (3 preceding siblings ...) 2024-10-01 19:50 ` [syzbot] Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync syzbot @ 2024-10-02 18:27 ` syzbot 2024-10-02 19:20 ` [syzbot] Re: [PATCH v3] " syzbot ` (11 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 18:27 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v2] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Wed, Oct 2, 2024 at 11:40 AM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > This makes use of disable_delayed_work_sync instead > cancel_delayed_work_sync as it not only cancel the ongoing work but also > disables new submit which is disarable since the object holding the work > is about to be freed. > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > since at that point it is useless to set a timer as the sk will be freed > there is nothing to be done in sco_sock_timeout. > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > --- > net/bluetooth/sco.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > index a5ac160c592e..8dfb53dabbd7 100644 > --- a/net/bluetooth/sco.c > +++ b/net/bluetooth/sco.c > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > } > > /* Ensure no more work items will run before freeing conn. */ > - cancel_delayed_work_sync(&conn->timeout_work); > + disable_delayed_work_sync(&conn->timeout_work); > > hcon->sco_data = NULL; > kfree(conn); > @@ -444,7 +444,6 @@ static void __sco_sock_close(struct sock *sk) > case BT_CONFIG: > if (sco_pi(sk)->conn->hcon) { > sk->sk_state = BT_DISCONN; > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > sco_conn_lock(sco_pi(sk)->conn); > hci_conn_drop(sco_pi(sk)->conn->hcon); > sco_pi(sk)->conn->hcon = NULL; > -- > 2.46.1 > -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (4 preceding siblings ...) 2024-10-02 18:27 ` [syzbot] Re: [PATCH v2] " syzbot @ 2024-10-02 19:20 ` syzbot 2024-10-02 19:47 ` syzbot ` (10 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 19:20 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > This makes use of disable_delayed_work_sync instead > cancel_delayed_work_sync as it not only cancel the ongoing work but also > disables new submit which is disarable since the object holding the work > is about to be freed. > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > since at that point it is useless to set a timer as the sk will be freed > there is nothing to be done in sco_sock_timeout. > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > --- > net/bluetooth/sco.c | 13 +------------ > 1 file changed, 1 insertion(+), 12 deletions(-) > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > index a5ac160c592e..2b1e66976068 100644 > --- a/net/bluetooth/sco.c > +++ b/net/bluetooth/sco.c > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > } > > /* Ensure no more work items will run before freeing conn. */ > - cancel_delayed_work_sync(&conn->timeout_work); > + disable_delayed_work_sync(&conn->timeout_work); > > hcon->sco_data = NULL; > kfree(conn); > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > case BT_CONNECTED: > case BT_CONFIG: > - if (sco_pi(sk)->conn->hcon) { > - sk->sk_state = BT_DISCONN; > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > - sco_conn_lock(sco_pi(sk)->conn); > - hci_conn_drop(sco_pi(sk)->conn->hcon); > - sco_pi(sk)->conn->hcon = NULL; > - sco_conn_unlock(sco_pi(sk)->conn); > - } else > - sco_chan_del(sk, ECONNRESET); > - break; > - > case BT_CONNECT2: > case BT_CONNECT: > case BT_DISCONN: > -- > 2.46.1 > -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (5 preceding siblings ...) 2024-10-02 19:20 ` [syzbot] Re: [PATCH v3] " syzbot @ 2024-10-02 19:47 ` syzbot 2024-10-02 20:46 ` syzbot ` (9 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 19:47 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > This makes use of disable_delayed_work_sync instead > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > disables new submit which is disarable since the object holding the work > > is about to be freed. > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > since at that point it is useless to set a timer as the sk will be freed > > there is nothing to be done in sco_sock_timeout. > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > --- > > net/bluetooth/sco.c | 13 +------------ > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > index a5ac160c592e..2b1e66976068 100644 > > --- a/net/bluetooth/sco.c > > +++ b/net/bluetooth/sco.c > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > } > > > > /* Ensure no more work items will run before freeing conn. */ > > - cancel_delayed_work_sync(&conn->timeout_work); > > + disable_delayed_work_sync(&conn->timeout_work); > > > > hcon->sco_data = NULL; > > kfree(conn); > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > case BT_CONNECTED: > > case BT_CONFIG: > > - if (sco_pi(sk)->conn->hcon) { > > - sk->sk_state = BT_DISCONN; > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > - sco_conn_lock(sco_pi(sk)->conn); > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > - sco_pi(sk)->conn->hcon = NULL; > > - sco_conn_unlock(sco_pi(sk)->conn); > > - } else > > - sco_chan_del(sk, ECONNRESET); > > - break; > > - > > case BT_CONNECT2: > > case BT_CONNECT: > > case BT_DISCONN: > > -- > > 2.46.1 > > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (6 preceding siblings ...) 2024-10-02 19:47 ` syzbot @ 2024-10-02 20:46 ` syzbot 2024-10-03 15:38 ` syzbot ` (8 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 20:46 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > This makes use of disable_delayed_work_sync instead > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > disables new submit which is disarable since the object holding the work > > > is about to be freed. > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > since at that point it is useless to set a timer as the sk will be freed > > > there is nothing to be done in sco_sock_timeout. > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > --- > > > net/bluetooth/sco.c | 13 +------------ > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > index a5ac160c592e..2b1e66976068 100644 > > > --- a/net/bluetooth/sco.c > > > +++ b/net/bluetooth/sco.c > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > } > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > hcon->sco_data = NULL; > > > kfree(conn); > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > case BT_CONNECTED: > > > case BT_CONFIG: > > > - if (sco_pi(sk)->conn->hcon) { > > > - sk->sk_state = BT_DISCONN; > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > - sco_conn_lock(sco_pi(sk)->conn); > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > - sco_pi(sk)->conn->hcon = NULL; > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > - } else > > > - sco_chan_del(sk, ECONNRESET); > > > - break; > > > - > > > case BT_CONNECT2: > > > case BT_CONNECT: > > > case BT_DISCONN: > > > -- > > > 2.46.1 > > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (7 preceding siblings ...) 2024-10-02 20:46 ` syzbot @ 2024-10-03 15:38 ` syzbot 2024-10-03 16:33 ` syzbot ` (7 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-03 15:38 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > disables new submit which is disarable since the object holding the work > > > > is about to be freed. > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > since at that point it is useless to set a timer as the sk will be freed > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > --- > > > > net/bluetooth/sco.c | 13 +------------ > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > index a5ac160c592e..2b1e66976068 100644 > > > > --- a/net/bluetooth/sco.c > > > > +++ b/net/bluetooth/sco.c > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > } > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > hcon->sco_data = NULL; > > > > kfree(conn); > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > case BT_CONNECTED: > > > > case BT_CONFIG: > > > > - if (sco_pi(sk)->conn->hcon) { > > > > - sk->sk_state = BT_DISCONN; > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > - } else > > > > - sco_chan_del(sk, ECONNRESET); > > > > - break; > > > > - > > > > case BT_CONNECT2: > > > > case BT_CONNECT: > > > > case BT_DISCONN: > > > > -- > > > > 2.46.1 > > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (8 preceding siblings ...) 2024-10-03 15:38 ` syzbot @ 2024-10-03 16:33 ` syzbot 2024-10-03 19:21 ` syzbot ` (6 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-03 16:33 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > disables new submit which is disarable since the object holding the work > > > > > is about to be freed. > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > --- > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > --- a/net/bluetooth/sco.c > > > > > +++ b/net/bluetooth/sco.c > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > } > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > hcon->sco_data = NULL; > > > > > kfree(conn); > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > case BT_CONNECTED: > > > > > case BT_CONFIG: > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > - sk->sk_state = BT_DISCONN; > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > - } else > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > - break; > > > > > - > > > > > case BT_CONNECT2: > > > > > case BT_CONNECT: > > > > > case BT_DISCONN: > > > > > -- > > > > > 2.46.1 > > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (9 preceding siblings ...) 2024-10-03 16:33 ` syzbot @ 2024-10-03 19:21 ` syzbot 2024-10-04 16:06 ` syzbot ` (5 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-03 19:21 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > disables new submit which is disarable since the object holding the work > > > > > > is about to be freed. > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > --- > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > --- a/net/bluetooth/sco.c > > > > > > +++ b/net/bluetooth/sco.c > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > } > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > kfree(conn); > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > case BT_CONNECTED: > > > > > > case BT_CONFIG: > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > - } else > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > - break; > > > > > > - > > > > > > case BT_CONNECT2: > > > > > > case BT_CONNECT: > > > > > > case BT_DISCONN: > > > > > > -- > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (10 preceding siblings ...) 2024-10-03 19:21 ` syzbot @ 2024-10-04 16:06 ` syzbot 2024-10-04 17:24 ` syzbot ` (4 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-04 16:06 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Thu, Oct 3, 2024 at 3:21 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > #syz test > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > > disables new submit which is disarable since the object holding the work > > > > > > > is about to be freed. > > > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > --- > > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > > --- a/net/bluetooth/sco.c > > > > > > > +++ b/net/bluetooth/sco.c > > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > > } > > > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > > kfree(conn); > > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > > > case BT_CONNECTED: > > > > > > > case BT_CONFIG: > > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > > - } else > > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > > - break; > > > > > > > - > > > > > > > case BT_CONNECT2: > > > > > > > case BT_CONNECT: > > > > > > > case BT_DISCONN: > > > > > > > -- > > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (11 preceding siblings ...) 2024-10-04 16:06 ` syzbot @ 2024-10-04 17:24 ` syzbot 2024-10-07 17:16 ` syzbot ` (3 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-04 17:24 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Fri, Oct 4, 2024 at 12:06 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Thu, Oct 3, 2024 at 3:21 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > #syz test > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > > > disables new submit which is disarable since the object holding the work > > > > > > > > is about to be freed. > > > > > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > --- > > > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > > > --- a/net/bluetooth/sco.c > > > > > > > > +++ b/net/bluetooth/sco.c > > > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > > > } > > > > > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > > > kfree(conn); > > > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > > > > > case BT_CONNECTED: > > > > > > > > case BT_CONFIG: > > > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > > > - } else > > > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > > > - break; > > > > > > > > - > > > > > > > > case BT_CONNECT2: > > > > > > > > case BT_CONNECT: > > > > > > > > case BT_DISCONN: > > > > > > > > -- > > > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (12 preceding siblings ...) 2024-10-04 17:24 ` syzbot @ 2024-10-07 17:16 ` syzbot 2024-10-07 20:54 ` syzbot ` (2 subsequent siblings) 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-07 17:16 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Fri, Oct 4, 2024 at 1:24 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Fri, Oct 4, 2024 at 12:06 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Thu, Oct 3, 2024 at 3:21 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > #syz test > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > > > > disables new submit which is disarable since the object holding the work > > > > > > > > > is about to be freed. > > > > > > > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > --- > > > > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > > > > --- a/net/bluetooth/sco.c > > > > > > > > > +++ b/net/bluetooth/sco.c > > > > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > > > > } > > > > > > > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > > > > kfree(conn); > > > > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > > > > > > > case BT_CONNECTED: > > > > > > > > > case BT_CONFIG: > > > > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > > > > - } else > > > > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > > > > - break; > > > > > > > > > - > > > > > > > > > case BT_CONNECT2: > > > > > > > > > case BT_CONNECT: > > > > > > > > > case BT_DISCONN: > > > > > > > > > -- > > > > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (13 preceding siblings ...) 2024-10-07 17:16 ` syzbot @ 2024-10-07 20:54 ` syzbot 2024-10-22 16:44 ` syzbot 2024-10-22 19:19 ` syzbot 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-07 20:54 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Mon, Oct 7, 2024 at 1:16 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Fri, Oct 4, 2024 at 1:24 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Fri, Oct 4, 2024 at 12:06 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Thu, Oct 3, 2024 at 3:21 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > #syz test > > > > > > > > > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > > > > > disables new submit which is disarable since the object holding the work > > > > > > > > > > is about to be freed. > > > > > > > > > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > --- > > > > > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > > > > > --- a/net/bluetooth/sco.c > > > > > > > > > > +++ b/net/bluetooth/sco.c > > > > > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > > > > > } > > > > > > > > > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > > > > > kfree(conn); > > > > > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > > > > > > > > > case BT_CONNECTED: > > > > > > > > > > case BT_CONFIG: > > > > > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > > > > > - } else > > > > > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > > > > > - break; > > > > > > > > > > - > > > > > > > > > > case BT_CONNECT2: > > > > > > > > > > case BT_CONNECT: > > > > > > > > > > case BT_DISCONN: > > > > > > > > > > -- > > > > > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (14 preceding siblings ...) 2024-10-07 20:54 ` syzbot @ 2024-10-22 16:44 ` syzbot 2024-10-22 19:19 ` syzbot 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-22 16:44 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Mon, Oct 7, 2024 at 4:54 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Mon, Oct 7, 2024 at 1:16 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Fri, Oct 4, 2024 at 1:24 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Fri, Oct 4, 2024 at 12:06 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Thu, Oct 3, 2024 at 3:21 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > #syz test > > > > > > > > > > > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > > > > > > disables new submit which is disarable since the object holding the work > > > > > > > > > > > is about to be freed. > > > > > > > > > > > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > --- > > > > > > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > > > > > > --- a/net/bluetooth/sco.c > > > > > > > > > > > +++ b/net/bluetooth/sco.c > > > > > > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > > > > > > } > > > > > > > > > > > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > > > > > > kfree(conn); > > > > > > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > > > > > > > > > > > case BT_CONNECTED: > > > > > > > > > > > case BT_CONFIG: > > > > > > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > > > > > > - } else > > > > > > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > > > > > > - break; > > > > > > > > > > > - > > > > > > > > > > > case BT_CONNECT2: > > > > > > > > > > > case BT_CONNECT: > > > > > > > > > > > case BT_DISCONN: > > > > > > > > > > > -- > > > > > > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync 2023-11-16 14:03 [syzbot] Test on mainline syzbot ` (15 preceding siblings ...) 2024-10-22 16:44 ` syzbot @ 2024-10-22 19:19 ` syzbot 16 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-22 19:19 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [PATCH v3] Bluetooth: SCO: Use disable_delayed_work_sync Author: luiz.dentz@gmail.com #syz test On Tue, Oct 22, 2024 at 12:44 PM Luiz Augusto von Dentz <luiz.dentz@gmail.com> wrote: > > #syz test > > On Mon, Oct 7, 2024 at 4:54 PM Luiz Augusto von Dentz > <luiz.dentz@gmail.com> wrote: > > > > #syz test > > > > On Mon, Oct 7, 2024 at 1:16 PM Luiz Augusto von Dentz > > <luiz.dentz@gmail.com> wrote: > > > > > > #syz test > > > > > > On Fri, Oct 4, 2024 at 1:24 PM Luiz Augusto von Dentz > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > #syz test > > > > > > > > On Fri, Oct 4, 2024 at 12:06 PM Luiz Augusto von Dentz > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > #syz test > > > > > > > > > > On Thu, Oct 3, 2024 at 3:21 PM Luiz Augusto von Dentz > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > #syz test > > > > > > > > > > > > On Thu, Oct 3, 2024 at 12:32 PM Luiz Augusto von Dentz > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > On Thu, Oct 3, 2024 at 11:38 AM Luiz Augusto von Dentz > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 4:46 PM Luiz Augusto von Dentz > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:46 PM Luiz Augusto von Dentz > > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:19 PM Luiz Augusto von Dentz > > > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > > > > > #syz test > > > > > > > > > > > > > > > > > > > > > > On Wed, Oct 2, 2024 at 3:04 PM Luiz Augusto von Dentz > > > > > > > > > > > <luiz.dentz@gmail.com> wrote: > > > > > > > > > > > > > > > > > > > > > > > > From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > > > > > > > > > > > > > This makes use of disable_delayed_work_sync instead > > > > > > > > > > > > cancel_delayed_work_sync as it not only cancel the ongoing work but also > > > > > > > > > > > > disables new submit which is disarable since the object holding the work > > > > > > > > > > > > is about to be freed. > > > > > > > > > > > > > > > > > > > > > > > > In addition to it remove call to sco_sock_set_timer on __sco_sock_close > > > > > > > > > > > > since at that point it is useless to set a timer as the sk will be freed > > > > > > > > > > > > there is nothing to be done in sco_sock_timeout. > > > > > > > > > > > > > > > > > > > > > > > > Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com > > > > > > > > > > > > Closes: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > > > > > > > > > > > > Fixes: ba316be1b6a0 ("Bluetooth: schedule SCO timeouts with delayed_work") > > > > > > > > > > > > Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> > > > > > > > > > > > > --- > > > > > > > > > > > > net/bluetooth/sco.c | 13 +------------ > > > > > > > > > > > > 1 file changed, 1 insertion(+), 12 deletions(-) > > > > > > > > > > > > > > > > > > > > > > > > diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c > > > > > > > > > > > > index a5ac160c592e..2b1e66976068 100644 > > > > > > > > > > > > --- a/net/bluetooth/sco.c > > > > > > > > > > > > +++ b/net/bluetooth/sco.c > > > > > > > > > > > > @@ -208,7 +208,7 @@ static void sco_conn_del(struct hci_conn *hcon, int err) > > > > > > > > > > > > } > > > > > > > > > > > > > > > > > > > > > > > > /* Ensure no more work items will run before freeing conn. */ > > > > > > > > > > > > - cancel_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > + disable_delayed_work_sync(&conn->timeout_work); > > > > > > > > > > > > > > > > > > > > > > > > hcon->sco_data = NULL; > > > > > > > > > > > > kfree(conn); > > > > > > > > > > > > @@ -442,17 +442,6 @@ static void __sco_sock_close(struct sock *sk) > > > > > > > > > > > > > > > > > > > > > > > > case BT_CONNECTED: > > > > > > > > > > > > case BT_CONFIG: > > > > > > > > > > > > - if (sco_pi(sk)->conn->hcon) { > > > > > > > > > > > > - sk->sk_state = BT_DISCONN; > > > > > > > > > > > > - sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); > > > > > > > > > > > > - sco_conn_lock(sco_pi(sk)->conn); > > > > > > > > > > > > - hci_conn_drop(sco_pi(sk)->conn->hcon); > > > > > > > > > > > > - sco_pi(sk)->conn->hcon = NULL; > > > > > > > > > > > > - sco_conn_unlock(sco_pi(sk)->conn); > > > > > > > > > > > > - } else > > > > > > > > > > > > - sco_chan_del(sk, ECONNRESET); > > > > > > > > > > > > - break; > > > > > > > > > > > > - > > > > > > > > > > > > case BT_CONNECT2: > > > > > > > > > > > > case BT_CONNECT: > > > > > > > > > > > > case BT_DISCONN: > > > > > > > > > > > > -- > > > > > > > > > > > > 2.46.1 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > > > > > -- > > > > > Luiz Augusto von Dentz > > > > > > > > > > > > > > > > -- > > > > Luiz Augusto von Dentz > > > > > > > > > > > > -- > > > Luiz Augusto von Dentz > > > > > > > > -- > > Luiz Augusto von Dentz > > > > -- > Luiz Augusto von Dentz -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZJYtnHH1MjnNFdzfvu6jFOypL6iHjQ1Ujh8aYaycZzjFQ@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZJYtnHH1MjnNFdzfvu6jFOypL6iHjQ1Ujh8aYaycZzjFQ@mail.gmail.com> @ 2024-10-22 19:51 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-22 19:51 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com Tested-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com Tested on: commit: c2ee9f59 KVM: selftests: Fix build on on non-x86 archi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12a34a5f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=346c6d758171538d dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=101c0c30580000 Note: testing is done by a robot and is best-effort only. ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZLHhVmQj3R5JS13HTp7KrCrs-HBcRFLqn6AU44uLpbXjA@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZLHhVmQj3R5JS13HTp7KrCrs-HBcRFLqn6AU44uLpbXjA@mail.gmail.com> @ 2024-10-22 17:15 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-22 17:15 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_conn_del ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_conn_del+0xa5/0x310 net/bluetooth/sco.c:220 Write of size 4 at addr ffff88807bd72080 by task syz-executor.0/5406 CPU: 0 UID: 0 PID: 5406 Comm: syz-executor.0 Not tainted 6.12.0-rc4-syzkaller-gc2ee9f594da8-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_conn_del+0xa5/0x310 net/bluetooth/sco.c:220 hci_disconn_cfm include/net/bluetooth/hci_core.h:1975 [inline] hci_conn_hash_flush+0x101/0x240 net/bluetooth/hci_conn.c:2592 hci_dev_close_sync+0x9ef/0x11a0 net/bluetooth/hci_sync.c:5195 hci_dev_do_close net/bluetooth/hci_core.c:483 [inline] hci_unregister_dev+0x20b/0x510 net/bluetooth/hci_core.c:2698 vhci_release+0x80/0xd0 drivers/bluetooth/hci_vhci.c:664 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:939 do_group_exit+0x207/0x2c0 kernel/exit.c:1088 __do_sys_exit_group kernel/exit.c:1099 [inline] __se_sys_exit_group kernel/exit.c:1097 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f018087de69 Code: Unable to access opcode bytes at 0x7f018087de3f. RSP: 002b:00007fffa31fb468 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f018087de69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043 RBP: 00007f01808ca45b R08: 00007fffa31f9207 R09: 000000000006d03d R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006 R13: 000000000006d03d R14: 000000000006ccf5 R15: 0000000000000004 </TASK> Allocated by task 5400: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4141 getname_flags+0xb7/0x540 fs/namei.c:139 getname fs/namei.c:225 [inline] __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0x3a/0x50 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5400: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kmem_cache_free+0x1a2/0x420 mm/slub.c:4681 do_unlinkat+0x7b0/0x830 fs/namei.c:4556 __do_sys_unlink fs/namei.c:4581 [inline] __se_sys_unlink fs/namei.c:4579 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4579 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807bd71100 which belongs to the cache names_cache of size 4096 The buggy address is located 3968 bytes inside of freed 4096-byte region [ffff88807bd71100, ffff88807bd72100) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7bd70 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff8880162f4780 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000070007 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff8880162f4780 dead000000000122 0000000000000000 head: 0000000000000000 0000000000070007 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0001ef5c01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5400, tgid 5400 (udevd), ts 432009536360, free_ts 431999575653 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2412 allocate_slab+0x5a/0x2f0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818 __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4141 getname_flags+0xb7/0x540 fs/namei.c:139 vfs_fstatat+0x12c/0x190 fs/stat.c:340 __do_sys_newfstatat fs/stat.c:505 [inline] __se_sys_newfstatat fs/stat.c:499 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 4552 tgid 4552 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2677 [inline] __put_partials+0xeb/0x130 mm/slub.c:3145 put_cpu_partial+0x17c/0x250 mm/slub.c:3220 __slab_free+0x2ea/0x3d0 mm/slub.c:4449 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x2b7/0x740 security/tomoyo/file.c:822 security_inode_getattr+0x130/0x330 security/security.c:2373 vfs_getattr+0x45/0x430 fs/stat.c:204 vfs_fstat fs/stat.c:229 [inline] vfs_fstatat+0xe4/0x190 fs/stat.c:338 __do_sys_newfstatat fs/stat.c:505 [inline] __se_sys_newfstatat fs/stat.c:499 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807bd71f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807bd72000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807bd72080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807bd72100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807bd72180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Tested on: commit: c2ee9f59 KVM: selftests: Fix build on on non-x86 archi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=103ff430580000 kernel config: https://syzkaller.appspot.com/x/.config?x=346c6d758171538d dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=13264a5f980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZKc5UFjYL5XxX0qy7vdOEENT1Pj7u6U4Pk+_cdJE+zAsg@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZKc5UFjYL5XxX0qy7vdOEENT1Pj7u6U4Pk+_cdJE+zAsg@mail.gmail.com> @ 2024-10-07 21:15 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-07 21:15 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0xa2/0x2d0 net/bluetooth/sco.c:140 Write of size 4 at addr ffff888140eac080 by task kworker/0:2/921 CPU: 0 UID: 0 PID: 921 Comm: kworker/0:2 Not tainted 6.12.0-rc2-syzkaller-g87d6aab2389e-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0xa2/0x2d0 net/bluetooth/sco.c:140 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5764: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:543 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:574 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5765: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x1a0/0x440 mm/slub.c:4727 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1302 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888140eac000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff888140eac000, ffff888140eac800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888140eab000 pfn:0x140ea8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x57ff00000000240(workingset|head|node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000240 ffff888015442000 ffffea000515b410 ffffea000510e610 raw: ffff888140eab000 0000000000080006 00000001f5000000 0000000000000000 head: 057ff00000000240 ffff888015442000 ffffea000515b410 ffffea000510e610 head: ffff888140eab000 0000000000080006 00000001f5000000 0000000000000000 head: 057ff00000000003 ffffea000503aa01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2263006817, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2412 allocate_slab+0x5a/0x2f0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818 __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4290 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] acpi_ds_create_walk_state+0x103/0x2a0 drivers/acpi/acpica/dswstate.c:518 acpi_ds_auto_serialize_method+0xe7/0x240 drivers/acpi/acpica/dsmethod.c:81 acpi_ds_init_one_object+0x1bb/0x370 drivers/acpi/acpica/dsinit.c:110 acpi_ns_walk_namespace+0x296/0x4f0 acpi_ds_initialize_objects+0x199/0x2b0 drivers/acpi/acpica/dsinit.c:189 acpi_ns_load_table+0xfd/0x120 drivers/acpi/acpica/nsload.c:106 acpi_tb_load_namespace+0x291/0x6d0 drivers/acpi/acpica/tbxfload.c:158 page_owner free stack trace missing Memory state around the buggy address: ffff888140eabf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888140eac000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888140eac080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888140eac100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888140eac180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 87d6aab2 Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=101aa707980000 kernel config: https://syzkaller.appspot.com/x/.config?x=a5119ec8290b5433 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=124a3b80580000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZ+XB+hAN7BmOQiKpdBBHXX_8JrDm3HpXJ=JKVBg8R1CGA@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZ+XB+hAN7BmOQiKpdBBHXX_8JrDm3HpXJ=JKVBg8R1CGA@mail.gmail.com> @ 2024-10-07 17:33 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-07 17:33 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff8880237b3080 by task kworker/0:1/9 CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.12.0-rc2-syzkaller-g8cf0b93919e1-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5742: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:521 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:552 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5743: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kfree+0x1a0/0x440 mm/slub.c:4727 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1280 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880237b3000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff8880237b3000, ffff8880237b3800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880237b5000 pfn:0x237b0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000240 ffff888015442000 ffffea00008c6a10 ffffea0001f13610 raw: ffff8880237b5000 0000000000080005 00000001f5000000 0000000000000000 head: 00fff00000000240 ffff888015442000 ffffea00008c6a10 ffffea0001f13610 head: ffff8880237b5000 0000000000080005 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea00008dec01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4550, tgid 4550 (udevd), ts 62011136939, free_ts 61932137647 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2412 allocate_slab+0x5a/0x2f0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818 __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] __do_kmalloc_node mm/slub.c:4263 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 __netlink_create+0x65/0x260 net/netlink/af_netlink.c:646 netlink_create+0x3ab/0x560 net/netlink/af_netlink.c:704 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 page last free pid 4539 tgid 4539 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2677 [inline] __put_partials+0xeb/0x130 mm/slub.c:3145 put_cpu_partial+0x17c/0x250 mm/slub.c:3220 __slab_free+0x2ea/0x3d0 mm/slub.c:4449 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4186 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1322 [inline] alloc_skb_with_frags+0xc3/0x820 net/core/skbuff.c:6612 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2883 unix_dgram_sendmsg+0x6d3/0x1f80 net/unix/af_unix.c:2027 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:744 __sys_sendto+0x39b/0x4f0 net/socket.c:2209 __do_sys_sendto net/socket.c:2221 [inline] __se_sys_sendto net/socket.c:2217 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2217 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 Memory state around the buggy address: ffff8880237b2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880237b3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880237b3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880237b3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880237b3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 8cf0b939 Linux 6.12-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11e7db80580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a5119ec8290b5433 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=150b2707980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZLfELHraPs15x1PYhBUQrd_OQTnef00Y+5nm0w7US2_Wg@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZLfELHraPs15x1PYhBUQrd_OQTnef00Y+5nm0w7US2_Wg@mail.gmail.com> @ 2024-10-04 17:40 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-04 17:40 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff88802719a080 by task kworker/1:3/5509 CPU: 1 UID: 0 PID: 5509 Comm: kworker/1:3 Not tainted 6.12.0-rc1-syzkaller-00125-g0c559323bbaa-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5115: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4284 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x254/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 5115: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 skb_kfree_head net/core/skbuff.c:1086 [inline] skb_free_head net/core/skbuff.c:1098 [inline] skb_release_data+0x6a0/0x8a0 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1436 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] nsim_dev_trap_report_work+0x765/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88802719a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 128 bytes inside of freed 4096-byte region [ffff88802719a000, ffff88802719b000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27198 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea00009c6601 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5115, tgid 5115 (kworker/0:4), ts 122322399972, free_ts 122095257880 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4284 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x254/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 page last free pid 5425 tgid 5425 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 __slab_free+0x31b/0x3d0 mm/slub.c:4491 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4142 getname_flags+0xb7/0x540 fs/namei.c:139 do_sys_openat2+0xd2/0x1d0 fs/open.c:1409 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1441 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888027199f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802719a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802719a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802719a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802719a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 0c559323 Merge tag 'rust-fixes-6.12' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=152e9307980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=12d69307980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZ+i88jmqD3pV2Czh=7fBhZ0_73s1+tsumt0+oVo8kSm1w@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZ+i88jmqD3pV2Czh=7fBhZ0_73s1+tsumt0+oVo8kSm1w@mail.gmail.com> @ 2024-10-04 16:34 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-04 16:34 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_conn_del ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_conn_del+0x9a/0x2c0 net/bluetooth/sco.c:227 Write of size 4 at addr ffff88801f485080 by task kworker/u9:1/4491 CPU: 0 UID: 0 PID: 4491 Comm: kworker/u9:1 Not tainted 6.12.0-rc1-syzkaller-00125-g0c559323bbaa-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci0 hci_cmd_sync_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_conn_del+0x9a/0x2c0 net/bluetooth/sco.c:227 sco_connect_cfm+0xe6/0xb40 net/bluetooth/sco.c:1381 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1d0/0x300 net/bluetooth/hci_conn.c:1262 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5586 hci_cmd_sync_work+0x22d/0x400 net/bluetooth/hci_sync.c:328 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5576: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:517 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:548 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5577: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1276 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801f485000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff88801f485000, ffff88801f485800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f480 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442000 ffffea00007d4800 0000000000000002 raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442000 ffffea00007d4800 0000000000000002 head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea00007d2001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5098, tgid 5098 (syz-executor.0), ts 63096504293, free_ts 61414295203 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] kmalloc_array_noprof include/linux/slab.h:923 [inline] cache_create_net+0x83/0x270 net/sunrpc/cache.c:1743 nfsd_idmap_init+0xe8/0x1e0 fs/nfsd/nfs4idmap.c:476 nfsd_net_init+0x4b/0x450 fs/nfsd/nfsctl.c:2242 ops_init+0x320/0x590 net/core/net_namespace.c:139 setup_net+0x287/0x9e0 net/core/net_namespace.c:356 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 page last free pid 5088 tgid 5085 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2678 [inline] __put_partials+0xeb/0x130 mm/slub.c:3146 put_cpu_partial+0x17c/0x250 mm/slub.c:3221 __slab_free+0x2ea/0x3d0 mm/slub.c:4450 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_add_entry security/tomoyo/common.c:2033 [inline] tomoyo_supervisor+0xe0d/0x11f0 security/tomoyo/common.c:2105 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0x243/0x360 security/tomoyo/file.c:587 tomoyo_path_perm+0x480/0x740 security/tomoyo/file.c:838 security_inode_getattr+0x130/0x330 security/security.c:2371 vfs_getattr+0x45/0x430 fs/stat.c:204 vfs_statx_path fs/stat.c:251 [inline] vfs_statx+0x199/0x490 fs/stat.c:315 vfs_fstatat+0x145/0x190 fs/stat.c:341 __do_sys_newfstatat fs/stat.c:505 [inline] __se_sys_newfstatat fs/stat.c:499 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 Memory state around the buggy address: ffff88801f484f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801f485000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801f485080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801f485100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801f485180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 0c559323 Merge tag 'rust-fixes-6.12' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13fdb3d0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=160db3d0580000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZ+=iNpM0TF4jDCqfJM4VWHY+CY5Vp1Ah91i8jGNKUeMKQ@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZ+=iNpM0TF4jDCqfJM4VWHY+CY5Vp1Ah91i8jGNKUeMKQ@mail.gmail.com> @ 2024-10-03 19:44 ` syzbot 2024-10-03 20:06 ` Luiz Augusto von Dentz 0 siblings, 1 reply; 40+ messages in thread From: syzbot @ 2024-10-03 19:44 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff88802639a080 by task kworker/1:2/1808 CPU: 1 UID: 0 PID: 1808 Comm: kworker/1:2 Not tainted 6.12.0-rc1-syzkaller-00113-g8c245fe7dde3-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 25: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4284 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x254/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Freed by task 25: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 skb_kfree_head net/core/skbuff.c:1086 [inline] skb_free_head net/core/skbuff.c:1098 [inline] skb_release_data+0x6a0/0x8a0 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] consume_skb+0x9f/0xf0 net/core/skbuff.c:1436 nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] nsim_dev_trap_report_work+0x765/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88802639a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 128 bytes inside of freed 4096-byte region [ffff88802639a000, ffff88802639b000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26398 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea000098e601 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5398, tgid 5398 (udevd), ts 123333990998, free_ts 123322335448 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path2_perm+0x3eb/0xbb0 security/tomoyo/file.c:923 tomoyo_path_rename+0x198/0x1e0 security/tomoyo/hooks.h:274 security_path_rename+0x266/0x4e0 security/security.c:2020 do_renameat2+0x94a/0x13f0 fs/namei.c:5157 __do_sys_rename fs/namei.c:5217 [inline] __se_sys_rename fs/namei.c:5215 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5215 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 page last free pid 4548 tgid 4548 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 __slab_free+0x31b/0x3d0 mm/slub.c:4491 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x2b7/0x740 security/tomoyo/file.c:822 security_inode_getattr+0x130/0x330 security/security.c:2371 vfs_getattr+0x45/0x430 fs/stat.c:204 vfs_fstat fs/stat.c:229 [inline] vfs_fstatat+0xe4/0x190 fs/stat.c:338 __do_sys_newfstatat fs/stat.c:505 [inline] __se_sys_newfstatat fs/stat.c:499 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888026399f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802639a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802639a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802639a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802639a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 8c245fe7 Merge tag 'net-6.12-rc2' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13156307980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=17377580580000 ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout 2024-10-03 19:44 ` syzbot @ 2024-10-03 20:06 ` Luiz Augusto von Dentz 0 siblings, 0 replies; 40+ messages in thread From: Luiz Augusto von Dentz @ 2024-10-03 20:06 UTC (permalink / raw) To: syzbot; +Cc: linux-bluetooth, linux-kernel, syzkaller-bugs On Thu, Oct 3, 2024 at 3:44 PM syzbot <syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com> wrote: > > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > KASAN: slab-use-after-free Write in sco_sock_timeout > > ================================================================== > BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] > BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] > BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] > BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] > BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] > BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] > BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 > Write of size 4 at addr ffff88802639a080 by task kworker/1:2/1808 This really doesn't make much sense, it seems this is catching a UAF on sock_hold but the backtrace shows it was freed with skb_free, even if the memory was reclaimed and then reallocated that would just it more difficult to find out why this is happening. > CPU: 1 UID: 0 PID: 1808 Comm: kworker/1:2 Not tainted 6.12.0-rc1-syzkaller-00113-g8c245fe7dde3-dirty #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 > Workqueue: events sco_sock_timeout > Call Trace: > <TASK> > __dump_stack lib/dump_stack.c:94 [inline] > dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 > print_address_description mm/kasan/report.c:377 [inline] > print_report+0x169/0x550 mm/kasan/report.c:488 > kasan_report+0x143/0x180 mm/kasan/report.c:601 > kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 > instrument_atomic_read_write include/linux/instrumented.h:96 [inline] > atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] > __refcount_add include/linux/refcount.h:184 [inline] > __refcount_inc include/linux/refcount.h:241 [inline] > refcount_inc include/linux/refcount.h:258 [inline] > sock_hold include/net/sock.h:781 [inline] > sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 > process_one_work kernel/workqueue.c:3229 [inline] > process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 > worker_thread+0x870/0xd30 kernel/workqueue.c:3391 > kthread+0x2f2/0x390 kernel/kthread.c:389 > ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > </TASK> > > Allocated by task 25: > kasan_save_stack mm/kasan/common.c:47 [inline] > kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 > poison_kmalloc_redzone mm/kasan/common.c:377 [inline] > __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 > kasan_kmalloc include/linux/kasan.h:257 [inline] > __do_kmalloc_node mm/slub.c:4265 [inline] > __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4284 > kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609 > __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678 > alloc_skb include/linux/skbuff.h:1322 [inline] > nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] > nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] > nsim_dev_trap_report_work+0x254/0xaa0 drivers/net/netdevsim/dev.c:850 > process_one_work kernel/workqueue.c:3229 [inline] > process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 > worker_thread+0x870/0xd30 kernel/workqueue.c:3391 > kthread+0x2f2/0x390 kernel/kthread.c:389 > ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > > Freed by task 25: > kasan_save_stack mm/kasan/common.c:47 [inline] > kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 > kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 > poison_slab_object mm/kasan/common.c:247 [inline] > __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 > kasan_slab_free include/linux/kasan.h:230 [inline] > slab_free_hook mm/slub.c:2343 [inline] > slab_free mm/slub.c:4580 [inline] > kfree+0x1a0/0x440 mm/slub.c:4728 > skb_kfree_head net/core/skbuff.c:1086 [inline] > skb_free_head net/core/skbuff.c:1098 [inline] > skb_release_data+0x6a0/0x8a0 net/core/skbuff.c:1125 > skb_release_all net/core/skbuff.c:1190 [inline] > __kfree_skb net/core/skbuff.c:1204 [inline] > consume_skb+0x9f/0xf0 net/core/skbuff.c:1436 > nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline] > nsim_dev_trap_report_work+0x765/0xaa0 drivers/net/netdevsim/dev.c:850 > process_one_work kernel/workqueue.c:3229 [inline] > process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 > worker_thread+0x870/0xd30 kernel/workqueue.c:3391 > kthread+0x2f2/0x390 kernel/kthread.c:389 > ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 > > The buggy address belongs to the object at ffff88802639a000 > which belongs to the cache kmalloc-4k of size 4096 > The buggy address is located 128 bytes inside of > freed 4096-byte region [ffff88802639a000, ffff88802639b000) > > The buggy address belongs to the physical page: > page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26398 > head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 > flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) > page_type: f5(slab) > raw: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 > raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 > head: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 > head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 > head: 00fff00000000003 ffffea000098e601 ffffffffffffffff 0000000000000000 > head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 > page dumped because: kasan: bad access detected > page_owner tracks the page as allocated > page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5398, tgid 5398 (udevd), ts 123333990998, free_ts 123322335448 > set_page_owner include/linux/page_owner.h:32 [inline] > post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 > prep_new_page mm/page_alloc.c:1545 [inline] > get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 > __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 > alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 > alloc_slab_page+0x6a/0x120 mm/slub.c:2413 > allocate_slab+0x5a/0x2f0 mm/slub.c:2579 > new_slab mm/slub.c:2632 [inline] > ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 > __slab_alloc+0x58/0xa0 mm/slub.c:3909 > __slab_alloc_node mm/slub.c:3962 [inline] > slab_alloc_node mm/slub.c:4123 [inline] > __do_kmalloc_node mm/slub.c:4264 [inline] > __kmalloc_noprof+0x25a/0x400 mm/slub.c:4277 > kmalloc_noprof include/linux/slab.h:882 [inline] > tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 > tomoyo_get_realpath security/tomoyo/file.c:151 [inline] > tomoyo_path2_perm+0x3eb/0xbb0 security/tomoyo/file.c:923 > tomoyo_path_rename+0x198/0x1e0 security/tomoyo/hooks.h:274 > security_path_rename+0x266/0x4e0 security/security.c:2020 > do_renameat2+0x94a/0x13f0 fs/namei.c:5157 > __do_sys_rename fs/namei.c:5217 [inline] > __se_sys_rename fs/namei.c:5215 [inline] > __x64_sys_rename+0x82/0x90 fs/namei.c:5215 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > page last free pid 4548 tgid 4548 stack trace: > reset_page_owner include/linux/page_owner.h:25 [inline] > free_pages_prepare mm/page_alloc.c:1108 [inline] > free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 > __slab_free+0x31b/0x3d0 mm/slub.c:4491 > qlink_free mm/kasan/quarantine.c:163 [inline] > qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 > kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 > __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 > kasan_slab_alloc include/linux/kasan.h:247 [inline] > slab_post_alloc_hook mm/slub.c:4086 [inline] > slab_alloc_node mm/slub.c:4135 [inline] > __do_kmalloc_node mm/slub.c:4264 [inline] > __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4277 > kmalloc_noprof include/linux/slab.h:882 [inline] > tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 > tomoyo_get_realpath security/tomoyo/file.c:151 [inline] > tomoyo_path_perm+0x2b7/0x740 security/tomoyo/file.c:822 > security_inode_getattr+0x130/0x330 security/security.c:2371 > vfs_getattr+0x45/0x430 fs/stat.c:204 > vfs_fstat fs/stat.c:229 [inline] > vfs_fstatat+0xe4/0x190 fs/stat.c:338 > __do_sys_newfstatat fs/stat.c:505 [inline] > __se_sys_newfstatat fs/stat.c:499 [inline] > __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > Memory state around the buggy address: > ffff888026399f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff88802639a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > >ffff88802639a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ^ > ffff88802639a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff88802639a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ================================================================== > > > Tested on: > > commit: 8c245fe7 Merge tag 'net-6.12-rc2' of git://git.kernel... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=13156307980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e > dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > patch: https://syzkaller.appspot.com/x/patch.diff?x=17377580580000 > -- Luiz Augusto von Dentz ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZJGF4156YhdOH5DoZ7hkh1NTrpQwntwJZiYJ9AyHYr14w@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZJGF4156YhdOH5DoZ7hkh1NTrpQwntwJZiYJ9AyHYr14w@mail.gmail.com> @ 2024-10-03 16:53 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-03 16:53 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_destruct ================================================================== BUG: KASAN: slab-use-after-free in sco_conn_destruct net/bluetooth/sco.c:167 [inline] BUG: KASAN: slab-use-after-free in sco_sock_destruct+0xb9/0x170 net/bluetooth/sco.c:409 Write of size 8 at addr ffff88807926cfe8 by task syz-executor.0/5580 CPU: 0 UID: 0 PID: 5580 Comm: syz-executor.0 Not tainted 6.12.0-rc1-syzkaller-g7ec462100ef9-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 sco_conn_destruct net/bluetooth/sco.c:167 [inline] sco_sock_destruct+0xb9/0x170 net/bluetooth/sco.c:409 __sk_destruct+0x5a/0x5f0 net/core/sock.c:2259 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1261 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f16c9a7de69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f16ca8910c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: fffffffffffffffc RBX: 00007f16c9babf80 RCX: 00007f16c9a7de69 RDX: 0000000000000008 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007f16c9aca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f16c9babf80 R15: 00007ffceef62378 </TASK> Allocated by task 5580: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4296 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] __hci_conn_add+0x2f9/0x1850 net/bluetooth/hci_conn.c:932 hci_conn_add_unset net/bluetooth/hci_conn.c:1041 [inline] hci_connect_sco+0xd0/0x370 net/bluetooth/hci_conn.c:1689 sco_connect net/bluetooth/sco.c:281 [inline] sco_sock_connect+0x2fc/0x990 net/bluetooth/sco.c:598 __sys_connect_file net/socket.c:2066 [inline] __sys_connect+0x2d3/0x300 net/socket.c:2083 __do_sys_connect net/socket.c:2093 [inline] __se_sys_connect net/socket.c:2090 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2090 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 54: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 device_release+0x9b/0x1c0 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x231/0x480 lib/kobject.c:737 hci_conn_cleanup net/bluetooth/hci_conn.c:174 [inline] hci_conn_del+0x8c4/0xc40 net/bluetooth/hci_conn.c:1160 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5586 hci_cmd_sync_work+0x22d/0x400 net/bluetooth/hci_sync.c:328 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 insert_work+0x3e/0x330 kernel/workqueue.c:2183 __queue_work+0xc8b/0xf50 kernel/workqueue.c:2339 queue_delayed_work_on+0x1ca/0x390 kernel/workqueue.c:2552 sco_chan_del net/bluetooth/sco.c:190 [inline] __sco_sock_close+0x22b/0x430 net/bluetooth/sco.c:461 sco_sock_close net/bluetooth/sco.c:476 [inline] sco_sock_release+0xb3/0x320 net/bluetooth/sco.c:1251 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807926c000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 4072 bytes inside of freed 8192-byte region [ffff88807926c000, ffff88807926e000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x79268 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442280 0000000000000000 0000000000000001 raw: 0000000000000000 0000000080020002 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442280 0000000000000000 0000000000000001 head: 0000000000000000 0000000080020002 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0001e49a01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4757, tgid 4757 (start-stop-daem), ts 32264510159, free_ts 32243341192 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0x11cd/0x2050 security/tomoyo/audit.c:264 tomoyo_supervisor+0x38a/0x11f0 security/tomoyo/common.c:2099 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x146e/0x1d40 security/tomoyo/domain.c:881 tomoyo_bprm_check_security+0x114/0x180 security/tomoyo/hooks.h:76 security_bprm_check+0x86/0x250 security/security.c:1296 search_binary_handler fs/exec.c:1740 [inline] exec_binprm fs/exec.c:1794 [inline] bprm_execve+0xa56/0x1770 fs/exec.c:1845 page last free pid 4757 tgid 4757 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2678 [inline] __put_partials+0xeb/0x130 mm/slub.c:3146 put_cpu_partial+0x17c/0x250 mm/slub.c:3221 __slab_free+0x2ea/0x3d0 mm/slub.c:4450 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] load_elf_phdrs fs/binfmt_elf.c:526 [inline] load_elf_binary+0x2eb/0x2710 fs/binfmt_elf.c:855 search_binary_handler fs/exec.c:1752 [inline] exec_binprm fs/exec.c:1794 [inline] bprm_execve+0xafa/0x1770 fs/exec.c:1845 do_execveat_common+0x55f/0x6f0 fs/exec.c:1952 do_execve fs/exec.c:2026 [inline] __do_sys_execve fs/exec.c:2102 [inline] __se_sys_execve fs/exec.c:2097 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2097 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88807926ce80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807926cf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807926cf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807926d000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807926d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 7ec46210 Merge tag 'pull-work.unaligned' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13e97580580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=11f17580580000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZJLj6gSa-1prGM5aLKTJbFJo5mxxJkBU=WoqEx-P6TdOA@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZJLj6gSa-1prGM5aLKTJbFJo5mxxJkBU=WoqEx-P6TdOA@mail.gmail.com> @ 2024-10-03 15:55 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-03 15:55 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in hci_conn_drop ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] BUG: KASAN: slab-use-after-free in hci_conn_drop+0x34/0x280 include/net/bluetooth/hci_core.h:1548 Write of size 4 at addr ffff88801ea58010 by task syz-executor.0/5537 CPU: 0 UID: 0 PID: 5537 Comm: syz-executor.0 Not tainted 6.12.0-rc1-syzkaller-g7ec462100ef9-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] hci_conn_drop+0x34/0x280 include/net/bluetooth/hci_core.h:1548 sco_conn_destruct+0x57/0x100 net/bluetooth/sco.c:166 sco_sock_destruct+0x43/0x90 net/bluetooth/sco.c:407 __sk_destruct+0x5a/0x5f0 net/core/sock.c:2259 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1259 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 __do_sys_close fs/open.c:1565 [inline] __se_sys_close fs/open.c:1550 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1550 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa71cc7cd5a Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24 RSP: 002b:00007ffc91af2860 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 00007fa71cc7cd5a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007fa71cdad980 R08: 0000001b2d160000 R09: 7fffffffffffffff R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000016f8e R13: ffffffffffffffff R14: 00007fa71c800000 R15: 0000000000016c4d </TASK> Allocated by task 5455: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4296 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] __hci_conn_add+0x2f9/0x1850 net/bluetooth/hci_conn.c:932 hci_conn_add_unset net/bluetooth/hci_conn.c:1041 [inline] hci_connect_sco+0xd0/0x370 net/bluetooth/hci_conn.c:1689 sco_connect net/bluetooth/sco.c:279 [inline] sco_sock_connect+0x2fc/0x990 net/bluetooth/sco.c:596 __sys_connect_file net/socket.c:2066 [inline] __sys_connect+0x2d3/0x300 net/socket.c:2083 __do_sys_connect net/socket.c:2093 [inline] __se_sys_connect net/socket.c:2090 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2090 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 4494: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 device_release+0x9b/0x1c0 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x231/0x480 lib/kobject.c:737 hci_conn_cleanup net/bluetooth/hci_conn.c:174 [inline] hci_conn_del+0x8c4/0xc40 net/bluetooth/hci_conn.c:1160 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5586 hci_cmd_sync_work+0x22d/0x400 net/bluetooth/hci_sync.c:328 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 insert_work+0x3e/0x330 kernel/workqueue.c:2183 __queue_work+0xc8b/0xf50 kernel/workqueue.c:2339 queue_delayed_work_on+0x1ca/0x390 kernel/workqueue.c:2552 sco_conn_destruct+0x57/0x100 net/bluetooth/sco.c:166 sco_sock_destruct+0x43/0x90 net/bluetooth/sco.c:407 __sk_destruct+0x5a/0x5f0 net/core/sock.c:2259 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1259 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801ea58000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 16 bytes inside of freed 8192-byte region [ffff88801ea58000, ffff88801ea5a000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ea58 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442280 0000000000000000 dead000000000001 raw: 0000000000000000 0000000080020002 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442280 0000000000000000 dead000000000001 head: 0000000000000000 0000000080020002 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea00007a9601 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4772, tgid 4772 (dhcpcd-run-hook), ts 33884825404, free_ts 32631813811 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] tomoyo_print_bprm security/tomoyo/audit.c:26 [inline] tomoyo_init_log+0x11cd/0x2050 security/tomoyo/audit.c:264 tomoyo_supervisor+0x38a/0x11f0 security/tomoyo/common.c:2099 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x178/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:672 [inline] tomoyo_find_next_domain+0x146e/0x1d40 security/tomoyo/domain.c:881 tomoyo_bprm_check_security+0x114/0x180 security/tomoyo/hooks.h:76 security_bprm_check+0x86/0x250 security/security.c:1296 search_binary_handler fs/exec.c:1740 [inline] exec_binprm fs/exec.c:1794 [inline] bprm_execve+0xa56/0x1770 fs/exec.c:1845 page last free pid 4743 tgid 4743 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2678 [inline] __put_partials+0xeb/0x130 mm/slub.c:3146 put_cpu_partial+0x17c/0x250 mm/slub.c:3221 __slab_free+0x2ea/0x3d0 mm/slub.c:4450 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] tomoyo_print_header security/tomoyo/audit.c:156 [inline] tomoyo_init_log+0x1ca/0x2050 security/tomoyo/audit.c:255 tomoyo_supervisor+0x38a/0x11f0 security/tomoyo/common.c:2099 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission+0x243/0x360 security/tomoyo/file.c:587 tomoyo_path_perm+0x480/0x740 security/tomoyo/file.c:838 security_inode_getattr+0x130/0x330 security/security.c:2371 vfs_getattr+0x45/0x430 fs/stat.c:204 vfs_fstat fs/stat.c:229 [inline] vfs_fstatat+0xe4/0x190 fs/stat.c:338 __do_sys_newfstatat fs/stat.c:505 [inline] __se_sys_newfstatat fs/stat.c:499 [inline] __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499 Memory state around the buggy address: ffff88801ea57f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801ea57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801ea58000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801ea58080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801ea58100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: 7ec46210 Merge tag 'pull-work.unaligned' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=114d5527980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=15355527980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZLeWWtX9PdNarFajZynUSsyrd4mavExPXzY2GUf_ZzECw@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZLeWWtX9PdNarFajZynUSsyrd4mavExPXzY2GUf_ZzECw@mail.gmail.com> @ 2024-10-02 23:16 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 23:16 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff8881442d6080 by task kworker/1:3/5112 CPU: 1 UID: 0 PID: 5112 Comm: kworker/1:3 Not tainted 6.12.0-rc1-syzkaller-gf23aa4c0761a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5785: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:490 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:521 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5786: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1249 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8881442d6000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff8881442d6000, ffff8881442d6800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1442d0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000040 ffff888015442000 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 057ff00000000040 ffff888015442000 0000000000000000 dead000000000001 head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 057ff00000000003 ffffea000510b401 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2464151042, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] acpi_ds_create_walk_state+0x103/0x2a0 drivers/acpi/acpica/dswstate.c:518 acpi_ps_execute_method+0x245/0x880 drivers/acpi/acpica/psxface.c:134 acpi_ns_evaluate+0x5df/0xa40 drivers/acpi/acpica/nseval.c:205 acpi_evaluate_object+0x59b/0xaf0 drivers/acpi/acpica/nsxfeval.c:354 map_mat_entry drivers/acpi/processor_core.c:241 [inline] acpi_get_phys_id+0xa5/0xd00 drivers/acpi/processor_core.c:274 acpi_get_cpuid+0x28/0x1f0 drivers/acpi/processor_core.c:332 processor_physically_present+0x29a/0x380 drivers/acpi/acpi_processor.c:565 page_owner free stack trace missing Memory state around the buggy address: ffff8881442d5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881442d6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881442d6080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881442d6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881442d6180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: f23aa4c0 Merge tag 'hid-for-linus-2024090201' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d02307980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0ca089c3fc6b54e dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=14559927980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZLoh-K2QLinNwJrbQgSccTKW37C2wt5+AmM272Du3p81A@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZLoh-K2QLinNwJrbQgSccTKW37C2wt5+AmM272Du3p81A@mail.gmail.com> @ 2024-10-02 20:05 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 20:05 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff8881436fb080 by task kworker/0:3/1150 CPU: 0 UID: 0 PID: 1150 Comm: kworker/0:3 Not tainted 6.12.0-rc1-syzkaller-ge32cde8d2bd7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5769: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:489 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:520 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5770: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1248 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8881436fb000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff8881436fb000, ffff8881436fb800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1436f8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000040 ffff888015442000 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 057ff00000000040 ffff888015442000 0000000000000000 dead000000000001 head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 057ff00000000003 ffffea00050dbe01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 2322085089, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] acpi_add_single_object+0xe5/0x1e00 drivers/acpi/scan.c:1876 acpi_bus_check_add+0x32b/0x980 drivers/acpi/scan.c:2181 acpi_ns_walk_namespace+0x296/0x4f0 acpi_walk_namespace+0xeb/0x130 drivers/acpi/acpica/nsxfeval.c:606 acpi_bus_scan+0x4c1/0x560 drivers/acpi/scan.c:2595 acpi_scan_init+0x267/0x730 drivers/acpi/scan.c:2747 acpi_init+0x159/0x240 drivers/acpi/bus.c:1466 page_owner free stack trace missing Memory state around the buggy address: ffff8881436faf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881436fb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881436fb080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881436fb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881436fb180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: e32cde8d Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13299927980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5997f8b13c390e73 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=121f23d0580000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZKqrja__qdidRwqXh9wcJJ6YdGqdh4bejU5HsL02qcFpw@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZKqrja__qdidRwqXh9wcJJ6YdGqdh4bejU5HsL02qcFpw@mail.gmail.com> @ 2024-10-02 19:37 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 19:37 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff88807e2d5080 by task kworker/1:1/47 CPU: 1 UID: 0 PID: 47 Comm: kworker/1:1 Not tainted 6.12.0-rc1-syzkaller-ge32cde8d2bd7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5759: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:500 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:531 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5760: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1259 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807e2d5000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff88807e2d5000, ffff88807e2d5800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e2d0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442000 ffffea0000a07800 dead000000000002 raw: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442000 ffffea0000a07800 dead000000000002 head: 0000000000000000 0000000000080008 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0001f8b401 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4533, tgid 4533 (acpid), ts 19751533769, free_ts 17515017965 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x25a/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 __netlink_create+0x65/0x260 net/netlink/af_netlink.c:646 netlink_create+0x3ab/0x560 net/netlink/af_netlink.c:704 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 free_contig_range+0x152/0x550 mm/page_alloc.c:6748 destroy_args+0x8a/0x840 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x24a/0x880 init/main.c:1269 do_initcall_level+0x157/0x210 init/main.c:1331 do_initcalls+0x3f/0x80 init/main.c:1347 kernel_init_freeable+0x435/0x5d0 init/main.c:1580 kernel_init+0x1d/0x2b0 init/main.c:1469 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88807e2d4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88807e2d5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807e2d5080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807e2d5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e2d5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: e32cde8d Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=174f23d0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5997f8b13c390e73 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied. ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZKvkU59_bpzxd0fKMsDkhhSWiE41bF83ycP1FMXiMqeEg@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZKvkU59_bpzxd0fKMsDkhhSWiE41bF83ycP1FMXiMqeEg@mail.gmail.com> @ 2024-10-02 18:46 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-02 18:46 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_conn_del ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_conn_del+0xa5/0x310 net/bluetooth/sco.c:199 Write of size 4 at addr ffff88802ad8c080 by task kworker/u9:2/5106 CPU: 0 UID: 0 PID: 5106 Comm: kworker/u9:2 Not tainted 6.12.0-rc1-syzkaller-ge32cde8d2bd7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci0 hci_cmd_sync_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_conn_del+0xa5/0x310 net/bluetooth/sco.c:199 sco_connect_cfm+0xe6/0xb40 net/bluetooth/sco.c:1363 hci_connect_cfm include/net/bluetooth/hci_core.h:1960 [inline] hci_conn_failed+0x1d0/0x300 net/bluetooth/hci_conn.c:1262 hci_abort_conn_sync+0x583/0xde0 net/bluetooth/hci_sync.c:5586 hci_cmd_sync_work+0x22d/0x400 net/bluetooth/hci_sync.c:328 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 5633: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] sk_prot_alloc+0xe0/0x210 net/core/sock.c:2164 sk_alloc+0x38/0x370 net/core/sock.c:2217 bt_sock_alloc+0x3c/0x340 net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:499 [inline] sco_sock_create+0xbb/0x390 net/bluetooth/sco.c:530 bt_sock_create+0x163/0x230 net/bluetooth/af_bluetooth.c:132 __sock_create+0x492/0x920 net/socket.c:1576 sock_create net/socket.c:1627 [inline] __sys_socket_create net/socket.c:1664 [inline] __sys_socket+0x150/0x3c0 net/socket.c:1711 __do_sys_socket net/socket.c:1725 [inline] __se_sys_socket net/socket.c:1723 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1723 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5634: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 sk_prot_free net/core/sock.c:2200 [inline] __sk_destruct+0x479/0x5f0 net/core/sock.c:2292 sco_sock_release+0x25e/0x320 net/bluetooth/sco.c:1258 __sock_release net/socket.c:658 [inline] sock_close+0xbe/0x240 net/socket.c:1426 __fput+0x241/0x880 fs/file_table.c:431 task_work_run+0x251/0x310 kernel/task_work.c:228 get_signal+0x15e8/0x1740 kernel/signal.c:2690 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802ad8c000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff88802ad8c000, ffff88802ad8c800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2ad88 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442000 0000000000000000 0000000000000001 raw: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442000 0000000000000000 0000000000000001 head: 0000000000000000 0000000080080008 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0000ab6201 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4761, tgid 4761 (dhcpcd), ts 68514784369, free_ts 68293337708 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] rtnl_newlink+0xf2/0x20a0 net/core/rtnetlink.c:3739 rtnetlink_rcv_msg+0x741/0xcf0 net/core/rtnetlink.c:6646 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f8/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2602 page last free pid 5174 tgid 5174 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2678 [inline] __put_partials+0xeb/0x130 mm/slub.c:3146 put_cpu_partial+0x17c/0x250 mm/slub.c:3221 __slab_free+0x2ea/0x3d0 mm/slub.c:4450 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4142 vm_area_alloc+0x24/0x1d0 kernel/fork.c:472 mmap_region+0x1132/0x2990 mm/mmap.c:1424 do_mmap+0x8f0/0x1000 mm/mmap.c:496 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588 ksys_mmap_pgoff+0x4eb/0x720 mm/mmap.c:542 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88802ad8bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88802ad8c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802ad8c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802ad8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802ad8c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: e32cde8d Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13bb23d0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5997f8b13c390e73 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=14ebd39f980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <CABBYNZKmxnB=QK7REZvoT-32uH3Oy8SwgP+Ars8ok6ZD-HjvLg@mail.gmail.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <CABBYNZKmxnB=QK7REZvoT-32uH3Oy8SwgP+Ars8ok6ZD-HjvLg@mail.gmail.com> @ 2024-10-01 20:13 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2024-10-01 20:13 UTC (permalink / raw) To: linux-bluetooth, linux-kernel, luiz.dentz, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:781 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 Write of size 4 at addr ffff888022136080 by task kworker/1:0/25 CPU: 1 UID: 0 PID: 25 Comm: kworker/1:0 Not tainted 6.12.0-rc1-syzkaller-ge32cde8d2bd7-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events sco_sock_timeout Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:781 [inline] sco_sock_timeout+0x8b/0x270 net/bluetooth/sco.c:92 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Allocated by task 4550: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4265 [inline] __kmalloc_noprof+0x1fc/0x400 mm/slub.c:4277 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xcf/0x5e0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x777/0x990 security/security.c:3107 do_dentry_open+0x369/0x1460 fs/open.c:945 vfs_open+0x3e/0x330 fs/open.c:1088 do_open fs/namei.c:3774 [inline] path_openat+0x2c84/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1441 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 4550: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:2343 [inline] slab_free mm/slub.c:4580 [inline] kfree+0x1a0/0x440 mm/slub.c:4728 tomoyo_realpath_from_path+0x5a9/0x5e0 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x777/0x990 security/security.c:3107 do_dentry_open+0x369/0x1460 fs/open.c:945 vfs_open+0x3e/0x330 fs/open.c:1088 do_open fs/namei.c:3774 [inline] path_openat+0x2c84/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1441 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888022136000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 128 bytes inside of freed 4096-byte region [ffff888022136000, ffff888022137000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22130 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff888015442140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0000884c01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4550, tgid 4550 (udevd), ts 121918980453, free_ts 121043303487 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2413 allocate_slab+0x5a/0x2f0 mm/slub.c:2579 new_slab mm/slub.c:2632 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3819 __slab_alloc+0x58/0xa0 mm/slub.c:3909 __slab_alloc_node mm/slub.c:3962 [inline] slab_alloc_node mm/slub.c:4123 [inline] __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] kernfs_iop_get_link+0x67/0x5a0 fs/kernfs/symlink.c:135 vfs_readlink+0x170/0x3b0 fs/namei.c:5267 do_readlinkat+0x249/0x3a0 fs/stat.c:551 __do_sys_readlink fs/stat.c:574 [inline] __se_sys_readlink fs/stat.c:571 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:571 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 54 tgid 54 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 __slab_free+0x31b/0x3d0 mm/slub.c:4491 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] __kmalloc_cache_noprof+0x132/0x2c0 mm/slub.c:4291 kmalloc_noprof include/linux/slab.h:878 [inline] hci_cmd_sync_submit+0xcb/0x2f0 net/bluetooth/hci_sync.c:710 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff888022135f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888022136000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888022136080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888022136100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888022136180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== Tested on: commit: e32cde8d Merge tag 'sched_ext-for-6.12-rc1-fixes-1' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14e62580580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5997f8b13c390e73 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=12698927980000 ^ permalink raw reply [flat|nested] 40+ messages in thread
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout
@ 2023-12-09 13:29 xingwei lee
0 siblings, 0 replies; 40+ messages in thread
From: xingwei lee @ 2023-12-09 13:29 UTC (permalink / raw)
To: syzbot+4c0d0c4cde787116d465, syzbot+6b9277cad941daf126a2
Cc: linux-kernel, syzkaller-bugs, yuran.pereira, hdanton,
johan.hedberg, Luiz Augusto von Dentz, marcel
Hello
I reproduced both two bugs with relatively stable poc, hope it helps.
In my prograss, I meet three bugs titles are respectively
KASAN: slab-out-of-bounds Write in sco_sock_timeout
https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465
KASAN: slab-use-after-free Write in sco_conn_del
https://syzkaller.appspot.com/bug?extid=6b9277cad941daf126a2
KASAN: wild-memory-access Read in lock_sock_nested may be new.
My reproducer can crash in the latest net tree HEAD:
1ae4cd3cbdd08287c56c4cc816ebf05eb6681a0f and also the latest upstream
mainline.
However, when I try to execute their reproducer, the crash seems the
same, this makes me very likely that they are maybe the same bug.
TITLE: KASAN: slab-use-after-free Write in sco_sock_timeout
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write
home/dubbo/net/./include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed
home/dubbo/net/./include/linux/atomic/atomic-instrumented.h:252
[inline]
BUG: KASAN: slab-use-after-free in __refcount_add
home/dubbo/net/./include/linux/refcount.h:193 [inline]
BUG: KASAN: slab-use-after-free in __refcount_inc
home/dubbo/net/./include/linux/refcount.h:250 [inline]
BUG: KASAN: slab-use-after-free in refcount_inc
home/dubbo/net/./include/linux/refcount.h:267 [inline]
BUG: KASAN: slab-use-after-free in sock_hold
home/dubbo/net/./include/net/sock.h:777 [inline]
BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x68/0x2b0
home/dubbo/net/net/bluetooth/sco.c:88
Write of size 4 at addr ffff888156922080 by task kworker/1:0/8390
CPU: 1 PID: 8390 Comm: kworker/1:0 Not tainted 6.7.0-rc4-00141-g1ae4cd3cbdd0 #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.2-debian-1.16.2-1 04/01/4
Workqueue: events sco_sock_timeout
Call Trace:
<TASK>
__dump_stack home/dubbo/net/lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 home/dubbo/net/lib/dump_stack.c:106
print_address_description home/dubbo/net/mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 home/dubbo/net/mm/kasan/report.c:475
kasan_report+0xda/0x110 home/dubbo/net/mm/kasan/report.c:588
check_region_inline home/dubbo/net/mm/kasan/generic.c:181 [inline]
kasan_check_range+0xef/0x190 home/dubbo/net/mm/kasan/generic.c:187
instrument_atomic_read_write
home/dubbo/net/./include/linux/instrumented.h:96 [inline]
atomic_fetch_add_relaxed
home/dubbo/net/./include/linux/atomic/atomic-instrumented.h:252
[inline]
__refcount_add home/dubbo/net/./include/linux/refcount.h:193 [inline]
__refcount_inc home/dubbo/net/./include/linux/refcount.h:250 [inline]
refcount_inc home/dubbo/net/./include/linux/refcount.h:267 [inline]
sock_hold home/dubbo/net/./include/net/sock.h:777 [inline]
sco_sock_timeout+0x68/0x2b0 home/dubbo/net/net/bluetooth/sco.c:88
process_one_work+0x830/0x1550 home/dubbo/net/kernel/workqueue.c:2627
process_scheduled_works home/dubbo/net/kernel/workqueue.c:2700 [inline]
worker_thread+0x8b9/0x1290 home/dubbo/net/kernel/workqueue.c:2781
kthread+0x33c/0x440 home/dubbo/net/kernel/kthread.c:388
ret_from_fork+0x45/0x80 home/dubbo/net/arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 home/dubbo/net/arch/x86/entry/entry_64.S:242
</TASK>
Allocated by task 8208:
kasan_save_stack+0x33/0x50 home/dubbo/net/mm/kasan/common.c:45
kasan_set_track+0x25/0x30 home/dubbo/net/mm/kasan/common.c:52
____kasan_kmalloc home/dubbo/net/mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 home/dubbo/net/mm/kasan/common.c:383
kasan_kmalloc home/dubbo/net/./include/linux/kasan.h:198 [inline]
__do_kmalloc_node home/dubbo/net/mm/slab_common.c:1007 [inline]
__kmalloc+0x60/0x100 home/dubbo/net/mm/slab_common.c:1020
kmalloc home/dubbo/net/./include/linux/slab.h:604 [inline]
sk_prot_alloc+0x1a4/0x2a0 home/dubbo/net/net/core/sock.c:2075
sk_alloc+0x36/0xb80 home/dubbo/net/net/core/sock.c:2128
bt_sock_alloc+0x3b/0x3e0 home/dubbo/net/net/bluetooth/af_bluetooth.c:148
sco_sock_alloc home/dubbo/net/net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xe3/0x3b0 home/dubbo/net/net/bluetooth/sco.c:526
bt_sock_create+0x180/0x340 home/dubbo/net/net/bluetooth/af_bluetooth.c:132
__sock_create+0x328/0x800 home/dubbo/net/net/socket.c:1569
sock_create home/dubbo/net/net/socket.c:1620 [inline]
__sys_socket_create home/dubbo/net/net/socket.c:1657 [inline]
__sys_socket+0x14c/0x260 home/dubbo/net/net/socket.c:1704
__do_sys_socket home/dubbo/net/net/socket.c:1718 [inline]
__se_sys_socket home/dubbo/net/net/socket.c:1716 [inline]
__x64_sys_socket+0x72/0xb0 home/dubbo/net/net/socket.c:1716
do_syscall_x64 home/dubbo/net/arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x3f/0x110 home/dubbo/net/arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Freed by task 8209:
kasan_save_stack+0x33/0x50 home/dubbo/net/mm/kasan/common.c:45
kasan_set_track+0x25/0x30 home/dubbo/net/mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 home/dubbo/net/mm/kasan/generic.c:522
____kasan_slab_free home/dubbo/net/mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 home/dubbo/net/mm/kasan/common.c:200
kasan_slab_free home/dubbo/net/./include/linux/kasan.h:164 [inline]
slab_free_hook home/dubbo/net/mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 home/dubbo/net/mm/slub.c:1826
slab_free home/dubbo/net/mm/slub.c:3809 [inline]
__kmem_cache_free+0xc0/0x180 home/dubbo/net/mm/slub.c:3822
sk_prot_free home/dubbo/net/net/core/sock.c:2111 [inline]
__sk_destruct+0x602/0x770 home/dubbo/net/net/core/sock.c:2203
sk_destruct+0xc2/0xf0 home/dubbo/net/net/core/sock.c:2218
__sk_free+0xf4/0x3e0 home/dubbo/net/net/core/sock.c:2229
sk_free+0x7c/0xa0 home/dubbo/net/net/core/sock.c:2240
sock_put home/dubbo/net/./include/net/sock.h:1990 [inline]
sco_sock_kill home/dubbo/net/net/bluetooth/sco.c:426 [inline]
sco_sock_kill+0x19d/0x1c0 home/dubbo/net/net/bluetooth/sco.c:416
sco_sock_release+0x154/0x2c0 home/dubbo/net/net/bluetooth/sco.c:1256
__sock_release+0xae/0x260 home/dubbo/net/net/socket.c:659
sock_close+0x1c/0x20 home/dubbo/net/net/socket.c:1419
__fput+0x270/0xbb0 home/dubbo/net/fs/file_table.c:394
task_work_run+0x14d/0x240 home/dubbo/net/kernel/task_work.c:180
get_signal+0x1077/0x26e0 home/dubbo/net/kernel/signal.c:2680
arch_do_signal_or_restart+0x90/0x7f0
home/dubbo/net/arch/x86/kernel/signal.c:309
exit_to_user_mode_loop home/dubbo/net/kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 home/dubbo/net/kernel/entry/common.c:204
__syscall_exit_to_user_mode_work
home/dubbo/net/kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 home/dubbo/net/kernel/entry/common.c:296
do_syscall_64+0x4b/0x110 home/dubbo/net/arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Last potentially related work creation:
kasan_save_stack+0x33/0x50 home/dubbo/net/mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 home/dubbo/net/mm/kasan/generic.c:492
__call_rcu_common.constprop.0+0x9a/0x790 home/dubbo/net/kernel/rcu/tree.c:2681
netlink_release+0x120d/0x1ff0 home/dubbo/net/net/netlink/af_netlink.c:831
__sock_release+0xae/0x260 home/dubbo/net/net/socket.c:659
sock_close+0x1c/0x20 home/dubbo/net/net/socket.c:1419
__fput+0x270/0xbb0 home/dubbo/net/fs/file_table.c:394
__fput_sync+0x47/0x50 home/dubbo/net/fs/file_table.c:475
__do_sys_close home/dubbo/net/fs/open.c:1590 [inline]
__se_sys_close home/dubbo/net/fs/open.c:1575 [inline]
__x64_sys_close+0x87/0xf0 home/dubbo/net/fs/open.c:1575
do_syscall_x64 home/dubbo/net/arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x3f/0x110 home/dubbo/net/arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
The buggy address belongs to the object at ffff888156922000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 128 bytes inside of
freed 2048-byte region [ffff888156922000, ffff888156922800)
The buggy address belongs to the physical page:
page:ffffea00055a4800 refcount:1 mapcount:0 mapping:0000000000000000
index:0x0 pfn:0x15690
head:ffffea00055a4800 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000840(slab|head|node=1|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 057ff00000000840 ffff888012c43240 ffffea00053b0e10 ffffea000502e810
raw: 0000000000000000 0000000000050005 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask
0xd2040(__GFP_IO|__GFP_N3
set_page_owner home/dubbo/net/./include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 home/dubbo/net/mm/page_alloc.c:1537
prep_new_page home/dubbo/net/mm/page_alloc.c:1544 [inline]
get_page_from_freelist+0xa28/0x36c0 home/dubbo/net/mm/page_alloc.c:3312
__alloc_pages+0x1d0/0x4a0 home/dubbo/net/mm/page_alloc.c:4568
alloc_pages_mpol+0x258/0x5f0 home/dubbo/net/mm/mempolicy.c:2133
alloc_slab_page home/dubbo/net/mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 home/dubbo/net/mm/slub.c:2017
new_slab home/dubbo/net/mm/slub.c:2070 [inline]
___slab_alloc+0x8c7/0x1580 home/dubbo/net/mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 home/dubbo/net/mm/slub.c:3322
__slab_alloc_node home/dubbo/net/mm/slub.c:3375 [inline]
slab_alloc_node home/dubbo/net/mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x131/0x310 home/dubbo/net/mm/slub.c:3517
__do_kmalloc_node home/dubbo/net/mm/slab_common.c:1006 [inline]
__kmalloc+0x4f/0x100 home/dubbo/net/mm/slab_common.c:1020
kmalloc home/dubbo/net/./include/linux/slab.h:604 [inline]
kzalloc home/dubbo/net/./include/linux/slab.h:721 [inline]
tomoyo_init_log+0x1276/0x1f60 home/dubbo/net/security/tomoyo/audit.c:275
tomoyo_supervisor+0x30c/0x1170 home/dubbo/net/security/tomoyo/common.c:2089
tomoyo_audit_env_log home/dubbo/net/security/tomoyo/environ.c:36 [inline]
tomoyo_env_perm+0x18f/0x200 home/dubbo/net/security/tomoyo/environ.c:63
tomoyo_environ home/dubbo/net/security/tomoyo/domain.c:672 [inline]
tomoyo_find_next_domain+0xed8/0x2020
home/dubbo/net/security/tomoyo/domain.c:878
tomoyo_bprm_check_security home/dubbo/net/security/tomoyo/tomoyo.c:101 [inline]
tomoyo_bprm_check_security+0x12b/0x1d0
home/dubbo/net/security/tomoyo/tomoyo.c:91
security_bprm_check+0x6a/0xe0 home/dubbo/net/security/security.c:1103
search_binary_handler home/dubbo/net/fs/exec.c:1725 [inline]
exec_binprm home/dubbo/net/fs/exec.c:1779 [inline]
bprm_execve home/dubbo/net/fs/exec.c:1854 [inline]
bprm_execve+0x73a/0x1a90 home/dubbo/net/fs/exec.c:1810
page last free stack trace:
reset_page_owner home/dubbo/net/./include/linux/page_owner.h:24 [inline]
free_pages_prepare home/dubbo/net/mm/page_alloc.c:1137 [inline]
free_unref_page_prepare+0x4e5/0xa20 home/dubbo/net/mm/page_alloc.c:2347
free_unref_page+0x33/0x3b0 home/dubbo/net/mm/page_alloc.c:2487
qlink_free home/dubbo/net/mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 home/dubbo/net/mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x18e/0x1d0 home/dubbo/net/mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x65/0x90 home/dubbo/net/mm/kasan/common.c:305
kasan_slab_alloc home/dubbo/net/./include/linux/kasan.h:188 [inline]
slab_post_alloc_hook home/dubbo/net/mm/slab.h:763 [inline]
slab_alloc_node home/dubbo/net/mm/slub.c:3478 [inline]
slab_alloc home/dubbo/net/mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru home/dubbo/net/mm/slub.c:3493 [inline]
kmem_cache_alloc+0x163/0x390 home/dubbo/net/mm/slub.c:3502
kmem_cache_zalloc home/dubbo/net/./include/linux/slab.h:711 [inline]
alloc_empty_file+0x73/0x1d0 home/dubbo/net/fs/file_table.c:216
path_openat+0xdd/0x2c40 home/dubbo/net/fs/namei.c:3765
do_filp_open+0x1de/0x430 home/dubbo/net/fs/namei.c:3809
do_sys_openat2+0x176/0x1e0 home/dubbo/net/fs/open.c:1440
do_sys_open home/dubbo/net/fs/open.c:1455 [inline]
__do_sys_openat home/dubbo/net/fs/open.c:1471 [inline]
__se_sys_openat home/dubbo/net/fs/open.c:1466 [inline]
__x64_sys_openat+0x175/0x210 home/dubbo/net/fs/open.c:1466
do_syscall_x64 home/dubbo/net/arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x3f/0x110 home/dubbo/net/arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
Memory state around the buggy address:
ffff888156921f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888156922000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888156922080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888156922100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888156922180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
and my reproducer is at the same kernel commit at the lastest net tree
kernel commit: 1ae4cd3cbdd08287c56c4cc816ebf05eb6681a0f
kernel config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=b50bd31249191be8
KASAN: slab-out-of-bounds Write in sco_sock_timeout:
https://gist.github.com/xrivendell7/0dbaa3529a9845b008c31e0bc6c29236
KASAN: slab-use-after-free Write in sco_conn_del:
https://gist.github.com/xrivendell7/b813252b1c8f3f35aaee1af60b698d0a
KASAN: wild-memory-access Read in lock_sock_nested:
https://gist.github.com/xrivendell7/f2a0fba9a55413c64c6153d03cd3df58
all the gist contains the report, repro.c and repro.txt
BTW, I also run another crash maybe related to this one, Titled:
KASAN: use-after-free Write in sco_sock_timeout
KASAN: slab-out-of-bounds Write in sco_sock_timeout
KASAN: slab-use-after-free Write in __sco_sock_close
WARNING: refcount bug in sco_sock_timeout
INFO: trying to register non-static key in sco_sock_timeout
However, for now, i can not reproduce those bugs with stable reproducer.
I hope is helps.
Best Regards
xingwei Lee
^ permalink raw reply [flat|nested] 40+ messages in thread[parent not found: <tencent_85865BC99E2ECEEEDC4CA2A7CC46E912F006@qq.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <tencent_85865BC99E2ECEEEDC4CA2A7CC46E912F006@qq.com> @ 2023-11-18 4:14 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-18 4:14 UTC (permalink / raw) To: eadavis, linux-kernel, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in sco_sock_timeout ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:193 [inline] BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:250 [inline] BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:267 [inline] BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:777 [inline] BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x64/0x25c net/bluetooth/sco.c:88 Write of size 4 at addr ffff0000db795080 by task kworker/0:3/6101 CPU: 0 PID: 6101 Comm: kworker/0:3 Not tainted 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: events sco_sock_timeout Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x174/0x514 mm/kasan/report.c:475 kasan_report+0xd8/0x138 mm/kasan/report.c:588 kasan_check_range+0x254/0x294 mm/kasan/generic.c:187 __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:193 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] sock_hold include/net/sock.h:777 [inline] sco_sock_timeout+0x64/0x25c net/bluetooth/sco.c:88 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 Allocated by task 6617: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1026 [inline] __kmalloc+0xcc/0x1b8 mm/slab_common.c:1039 kmalloc include/linux/slab.h:603 [inline] sk_prot_alloc+0xc4/0x1f0 net/core/sock.c:2090 sk_alloc+0x44/0x3f4 net/core/sock.c:2143 bt_sock_alloc+0x4c/0x32c net/bluetooth/af_bluetooth.c:148 sco_sock_alloc net/bluetooth/sco.c:496 [inline] sco_sock_create+0xbc/0x31c net/bluetooth/sco.c:527 bt_sock_create+0x14c/0x248 net/bluetooth/af_bluetooth.c:132 __sock_create+0x43c/0x884 net/socket.c:1569 sock_create net/socket.c:1620 [inline] __sys_socket_create net/socket.c:1657 [inline] __sys_socket+0x134/0x340 net/socket.c:1708 __do_sys_socket net/socket.c:1722 [inline] __se_sys_socket net/socket.c:1720 [inline] __arm64_sys_socket+0x7c/0x94 net/socket.c:1720 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Freed by task 6617: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x2ac/0x480 mm/slub.c:3822 kfree+0xb8/0x19c mm/slab_common.c:1075 sk_prot_free net/core/sock.c:2126 [inline] __sk_destruct+0x4c0/0x770 net/core/sock.c:2218 sk_destruct net/core/sock.c:2233 [inline] __sk_free+0x37c/0x4e8 net/core/sock.c:2244 sk_free+0x60/0xc8 net/core/sock.c:2255 sock_put include/net/sock.h:1989 [inline] sco_sock_kill+0xfc/0x1b4 net/bluetooth/sco.c:427 sco_sock_release+0x1fc/0x2c0 net/bluetooth/sco.c:1257 __sock_release net/socket.c:659 [inline] sock_close+0xa4/0x1e8 net/socket.c:1419 __fput+0x324/0x7f8 fs/file_table.c:384 ____fput+0x20/0x30 fs/file_table.c:412 task_work_run+0x230/0x2e0 kernel/task_work.c:180 get_signal+0x13f4/0x15ec kernel/signal.c:2668 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x3bc/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 The buggy address belongs to the object at ffff0000db795000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 128 bytes inside of freed 2048-byte region [ffff0000db795000, ffff0000db795800) The buggy address belongs to the physical page: page:0000000058a39b68 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000db797000 pfn:0x11b790 head:0000000058a39b68 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000840 ffff0000c0002000 ffff0000c0000948 fffffc0003359410 raw: ffff0000db797000 0000000000080006 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000db794f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000db795000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff0000db795080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000db795100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000db795180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ refcount_t: addition on 0; use-after-free. WARNING: CPU: 0 PID: 6101 at lib/refcount.c:25 refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25 Modules linked in: CPU: 0 PID: 6101 Comm: kworker/0:3 Tainted: G B 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: events sco_sock_timeout pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25 lr : refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25 sp : ffff800096c47af0 x29: ffff800096c47af0 x28: 1fffe0001abfc00a x27: dfff800000000000 x26: ffff0000c1084008 x25: ffff0000d5fe0050 x24: ffff0001b418b500 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000002 x20: ffff0000db795080 x19: ffff8000910a2000 x18: ffff800096c47800 x17: 0000000000000000 x16: ffff80008a6688c0 x15: 0000000000000001 x14: 1ffff00012d88e78 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000000000 x9 : 345179c02a25c000 x8 : 345179c02a25c000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800096c473d8 x4 : ffff80008e4210a0 x3 : ffff8000803639bc x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25 __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] sock_hold include/net/sock.h:777 [inline] sco_sock_timeout+0x19c/0x25c net/bluetooth/sco.c:88 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 irq event stamp: 5571 hardirqs last enabled at (5571): [<ffff80008a719050>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (5571): [<ffff80008a719050>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (5570): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569 softirqs last enabled at (5414): [<ffff800085cd6e40>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (5414): [<ffff800085cd6e40>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] softirqs last enabled at (5414): [<ffff800085cd6e40>] nsim_dev_trap_report_work+0x620/0x924 drivers/net/netdevsim/dev.c:850 softirqs last disabled at (5412): [<ffff800085cd6dbc>] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (5412): [<ffff800085cd6dbc>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:816 [inline] softirqs last disabled at (5412): [<ffff800085cd6dbc>] nsim_dev_trap_report_work+0x59c/0x924 drivers/net/netdevsim/dev.c:850 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 0 PID: 6101 at lib/refcount.c:28 refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28 Modules linked in: CPU: 0 PID: 6101 Comm: kworker/0:3 Tainted: G B W 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Workqueue: events sco_sock_timeout pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28 lr : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28 sp : ffff800096c47af0 x29: ffff800096c47af0 x28: 1fffe0001abfc00a x27: dfff800000000000 x26: ffff0000c1084008 x25: ffff0000d5fe0050 x24: ffff0001b418b500 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000003 x20: ffff0000db795080 x19: ffff8000910a2000 x18: 1fffe0003682efce x17: 0000000000000000 x16: ffff80008a71b1fc x15: 0000000000000001 x14: 1ffff00012d88eb0 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000000 x9 : 345179c02a25c000 x8 : 345179c02a25c000 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800096c473d8 x4 : ffff80008e4210a0 x3 : ffff800082b180c4 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28 __refcount_sub_and_test include/linux/refcount.h:283 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] sock_put include/net/sock.h:1988 [inline] sco_sock_timeout+0x1b0/0x25c net/bluetooth/sco.c:100 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 irq event stamp: 5571 hardirqs last enabled at (5571): [<ffff80008a719050>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (5571): [<ffff80008a719050>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (5570): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569 softirqs last enabled at (5414): [<ffff800085cd6e40>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (5414): [<ffff800085cd6e40>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] softirqs last enabled at (5414): [<ffff800085cd6e40>] nsim_dev_trap_report_work+0x620/0x924 drivers/net/netdevsim/dev.c:850 softirqs last disabled at (5412): [<ffff800085cd6dbc>] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (5412): [<ffff800085cd6dbc>] nsim_dev_trap_report drivers/net/netdevsim/dev.c:816 [inline] softirqs last disabled at (5412): [<ffff800085cd6dbc>] nsim_dev_trap_report_work+0x59c/0x924 drivers/net/netdevsim/dev.c:850 ---[ end trace 0000000000000000 ]--- Tested on: commit: 8de1e7af Merge branch 'for-next/core' into for-kernelci git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=14336477680000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e6feaeda5dcbc27 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=139b4e48e80000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <20231118012439.1685-1-hdanton@sina.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <20231118012439.1685-1-hdanton@sina.com> @ 2023-11-18 2:07 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-18 2:07 UTC (permalink / raw) To: hdanton, linux-kernel, syzkaller-bugs Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-and-tested-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com Tested on: commit: 8de1e7af Merge branch 'for-next/core' into for-kernelci git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=14ace3d4e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e6feaeda5dcbc27 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=15faf610e80000 Note: testing is done by a robot and is best-effort only. ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <20231117121920.1599-1-hdanton@sina.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <20231117121920.1599-1-hdanton@sina.com> @ 2023-11-17 12:39 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-17 12:39 UTC (permalink / raw) To: hdanton, linux-kernel, syzkaller-bugs Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: slab-use-after-free Write in hci_conn_drop ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1375 [inline] BUG: KASAN: slab-use-after-free in hci_conn_drop+0x34/0x2bc include/net/bluetooth/hci_core.h:1523 Write of size 4 at addr ffff0000c892c010 by task syz-executor.0/6752 CPU: 0 PID: 6752 Comm: syz-executor.0 Not tainted 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x174/0x514 mm/kasan/report.c:475 kasan_report+0xd8/0x138 mm/kasan/report.c:588 kasan_check_range+0x254/0x294 mm/kasan/generic.c:187 __kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1375 [inline] hci_conn_drop+0x34/0x2bc include/net/bluetooth/hci_core.h:1523 __sco_sock_close+0x3a8/0x7b0 net/bluetooth/sco.c:443 sco_sock_close net/bluetooth/sco.c:468 [inline] sco_sock_release+0xb4/0x2c0 net/bluetooth/sco.c:1245 __sock_release net/socket.c:659 [inline] sock_close+0xa4/0x1e8 net/socket.c:1419 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Allocated by task 6753: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] kmalloc_trace+0x70/0x88 mm/slab_common.c:1122 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] hci_conn_add+0xcc/0x1210 net/bluetooth/hci_conn.c:957 hci_connect_sco+0x94/0x2bc net/bluetooth/hci_conn.c:1701 sco_connect net/bluetooth/sco.c:265 [inline] sco_sock_connect+0x270/0x8bc net/bluetooth/sco.c:590 __sys_connect_file net/socket.c:2050 [inline] __sys_connect+0x268/0x290 net/socket.c:2067 __do_sys_connect net/socket.c:2077 [inline] __se_sys_connect net/socket.c:2074 [inline] __arm64_sys_connect+0x7c/0x94 net/socket.c:2074 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Freed by task 5665: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x7c mm/kasan/common.c:52 kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522 ____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236 __kasan_slab_free+0x18/0x28 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x2ac/0x480 mm/slub.c:3822 kfree+0xb8/0x19c mm/slab_common.c:1075 bt_link_release+0x20/0x30 net/bluetooth/hci_sysfs.c:16 device_release+0x8c/0x1ac kobject_cleanup lib/kobject.c:682 [inline] kobject_release lib/kobject.c:716 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c4/0x3c4 lib/kobject.c:733 put_device+0x28/0x40 drivers/base/core.c:3732 hci_conn_put include/net/bluetooth/hci_core.h:1506 [inline] hci_conn_cleanup net/bluetooth/hci_conn.c:178 [inline] hci_conn_del+0x78c/0xabc net/bluetooth/hci_conn.c:1156 hci_conn_failed+0x204/0x2c0 net/bluetooth/hci_conn.c:1252 hci_abort_conn_sync+0x688/0xe38 net/bluetooth/hci_sync.c:5428 abort_conn_sync+0x5c/0x8c net/bluetooth/hci_conn.c:2910 hci_cmd_sync_work+0x1cc/0x34c net/bluetooth/hci_sync.c:306 process_one_work+0x694/0x1204 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:2784 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857 The buggy address belongs to the object at ffff0000c892c000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 16 bytes inside of freed 4096-byte region [ffff0000c892c000, ffff0000c892d000) The buggy address belongs to the physical page: page:00000000c7691a02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x108928 head:00000000c7691a02 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 05ffc00000000840 ffff0000c0002140 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000c892bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000c892bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000c892c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff0000c892c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff0000c892c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object: 000000000c51268a object type: timer_list hint: hci_conn_timeout+0x0/0x1e8 net/bluetooth/hci_conn.c:928 WARNING: CPU: 0 PID: 6752 at lib/debugobjects.c:517 debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 Modules linked in: CPU: 0 PID: 6752 Comm: syz-executor.0 Tainted: G B 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 lr : debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 sp : ffff800096f67790 x29: ffff800096f67790 x28: dfff800000000000 x27: ffff700012decf00 x26: dfff800000000000 x25: dfff800000000000 x24: ffff0000c892c390 x23: ffff80008ad651a0 x22: ffff800089881d98 x21: ffff80008a89c360 x20: 0000000000000000 x19: ffff80008ad64cc0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008a668980 x15: 0000000000000001 x14: 1ffff00012dece0c x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 0000000000000000 x9 : c73071275ea21a00 x8 : c73071275ea21a00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800096f67078 x4 : ffff80008e4210a0 x3 : ffff8000803639bc x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 debug_object_assert_init+0x318/0x3c8 lib/debugobjects.c:941 debug_timer_assert_init kernel/time/timer.c:792 [inline] debug_assert_init kernel/time/timer.c:837 [inline] __timer_delete+0xac/0x2f8 kernel/time/timer.c:1321 timer_delete+0x24/0x34 kernel/time/timer.c:1361 del_timer include/linux/timer.h:213 [inline] try_to_grab_pending+0x8c/0x618 kernel/workqueue.c:1564 __cancel_work+0xb0/0x2a8 kernel/workqueue.c:3582 cancel_delayed_work+0x24/0x38 kernel/workqueue.c:3620 hci_conn_drop+0x150/0x2bc include/net/bluetooth/hci_core.h:1548 __sco_sock_close+0x3a8/0x7b0 net/bluetooth/sco.c:443 sco_sock_close net/bluetooth/sco.c:468 [inline] sco_sock_release+0xb4/0x2c0 net/bluetooth/sco.c:1245 __sock_release net/socket.c:659 [inline] sock_close+0xa4/0x1e8 net/socket.c:1419 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 15717 hardirqs last enabled at (15717): [<ffff80008a719110>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (15717): [<ffff80008a719110>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (15716): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569 softirqs last enabled at (15458): [<ffff8000888c272c>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (15458): [<ffff8000888c272c>] lock_sock_nested+0xcc/0x11c net/core/sock.c:3512 softirqs last disabled at (15456): [<ffff8000888c26d4>] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (15456): [<ffff8000888c26d4>] lock_sock_nested+0x74/0x11c net/core/sock.c:3508 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6752 at kernel/workqueue.c:1939 __queue_delayed_work kernel/workqueue.c:1939 [inline] WARNING: CPU: 0 PID: 6752 at kernel/workqueue.c:1939 queue_delayed_work_on+0x214/0x2e4 kernel/workqueue.c:1986 Modules linked in: CPU: 0 PID: 6752 Comm: syz-executor.0 Tainted: G B W 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __queue_delayed_work kernel/workqueue.c:1939 [inline] pc : queue_delayed_work_on+0x214/0x2e4 kernel/workqueue.c:1986 lr : __queue_delayed_work kernel/workqueue.c:1939 [inline] lr : queue_delayed_work_on+0x214/0x2e4 kernel/workqueue.c:1986 sp : ffff800096f67af0 x29: ffff800096f67af0 x28: 1fffe0001a828d80 x27: dfff800000000000 x26: 0000000000000000 x25: ffff0000c892c3a8 x24: ffff0000cb635400 x23: 0000000000000000 x22: ffff0000c892c348 x21: 0000000000000008 x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008a71b2bc x15: ffff600019125869 x14: 1fffe00019125869 x13: 00000000000000fb x12: ffffffffffffffff x11: 0000000000000001 x10: 0000000000000000 x9 : 0000000000000000 x8 : ffff0000d5f21bc0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080221e68 x2 : 0000000000000000 x1 : 0000000000000008 x0 : 0000000000000000 Call trace: __queue_delayed_work kernel/workqueue.c:1939 [inline] queue_delayed_work_on+0x214/0x2e4 kernel/workqueue.c:1986 queue_delayed_work include/linux/workqueue.h:569 [inline] hci_conn_drop+0x198/0x2bc include/net/bluetooth/hci_core.h:1549 __sco_sock_close+0x3a8/0x7b0 net/bluetooth/sco.c:443 sco_sock_close net/bluetooth/sco.c:468 [inline] sco_sock_release+0xb4/0x2c0 net/bluetooth/sco.c:1245 __sock_release net/socket.c:659 [inline] sock_close+0xa4/0x1e8 net/socket.c:1419 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 15717 hardirqs last enabled at (15717): [<ffff80008a719110>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (15717): [<ffff80008a719110>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (15716): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569 softirqs last enabled at (15458): [<ffff8000888c272c>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (15458): [<ffff8000888c272c>] lock_sock_nested+0xcc/0x11c net/core/sock.c:3512 softirqs last disabled at (15456): [<ffff8000888c26d4>] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (15456): [<ffff8000888c26d4>] lock_sock_nested+0x74/0x11c net/core/sock.c:3508 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ ODEBUG: activate not available (active state 0) object: 000000002ed6b31e object type: work_struct hint: hci_conn_timeout+0x0/0x1e8 net/bluetooth/hci_conn.c:928 WARNING: CPU: 0 PID: 6752 at lib/debugobjects.c:517 debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 Modules linked in: CPU: 0 PID: 6752 Comm: syz-executor.0 Tainted: G B W 6.6.0-rc7-syzkaller-00089-g8de1e7afcc1c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 lr : debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 sp : ffff800096f67870 x29: ffff800096f67870 x28: dfff800000000000 x27: ffff700012decf1c x26: ffff0000e2130b78 x25: dfff800000000000 x24: ffff0000c892c348 x23: ffff80008ad651a0 x22: ffff800089881d98 x21: ffff80008a8710a0 x20: 0000000000000000 x19: ffff80008ad64c40 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008a71b2bc x15: 0000000000000001 x14: 1fffe0003682f032 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000002 x10: 0000000000000000 x9 : c73071275ea21a00 x8 : c73071275ea21a00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800096f67158 x4 : ffff80008e4210a0 x3 : ffff8000805a359c x2 : 0000000000000001 x1 : 0000000000000002 x0 : 0000000000000000 Call trace: debug_print_object+0x168/0x1e0 lib/debugobjects.c:514 debug_object_activate+0x600/0x7e0 lib/debugobjects.c:760 debug_work_activate kernel/workqueue.c:572 [inline] insert_work+0x4c/0x2d4 kernel/workqueue.c:1644 __queue_work+0xcf4/0x1338 kernel/workqueue.c:1799 __queue_delayed_work kernel/workqueue.c:1950 [inline] queue_delayed_work_on+0x1f4/0x2e4 kernel/workqueue.c:1986 queue_delayed_work include/linux/workqueue.h:569 [inline] hci_conn_drop+0x198/0x2bc include/net/bluetooth/hci_core.h:1549 __sco_sock_close+0x3a8/0x7b0 net/bluetooth/sco.c:443 sco_sock_close net/bluetooth/sco.c:468 [inline] sco_sock_release+0xb4/0x2c0 net/bluetooth/sco.c:1245 __sock_release net/socket.c:659 [inline] sock_close+0xa4/0x1e8 net/socket.c:1419 __fput+0x324/0x7f8 fs/file_table.c:384 __fput_sync+0x60/0x9c fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __arm64_sys_close+0x150/0x1e0 fs/open.c:1557 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 irq event stamp: 15717 hardirqs last enabled at (15717): [<ffff80008a719110>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (15717): [<ffff80008a719110>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (15716): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569 softirqs last enabled at (15458): [<ffff8000888c272c>] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (15458): [<ffff8000888c272c>] lock_sock_nested+0xcc/0x11c net/core/sock.c:3512 softirqs last disabled at (15456): [<ffff8000888c26d4>] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (15456): [<ffff8000888c26d4>] lock_sock_nested+0x74/0x11c net/core/sock.c:3508 ---[ end trace 0000000000000000 ]--- Tested on: commit: 8de1e7af Merge branch 'for-next/core' into for-kernelci git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=13ba3458e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=3e6feaeda5dcbc27 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=150ac400e80000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <20231117010151.3517036-1-lizhi.xu@windriver.com>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <20231117010151.3517036-1-lizhi.xu@windriver.com> @ 2023-11-17 1:12 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-17 1:12 UTC (permalink / raw) To: linux-kernel, lizhi.xu, syzkaller-bugs Hello, syzbot tried to test the proposed patch but the build/boot failed: net/bluetooth/sco.c:418:26: error: static assertion failed due to requirement '__builtin_types_compatible_p(struct sock, struct sock *) || __builtin_types_compatible_p(struct sock, void)': pointer type mismatch in container_of() Tested on: commit: 8de1e7af Merge branch 'for-next/core' into for-kernelci git tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git kernel config: https://syzkaller.appspot.com/x/.config?x=3e6feaeda5dcbc27 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=1417b23f680000 ^ permalink raw reply [flat|nested] 40+ messages in thread
[parent not found: <GV1PR10MB6563F8D2678DC24937488D80E8B0A@GV1PR10MB6563.EURPRD10.PROD.OUTLOOK.COM>]
* Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout [not found] <GV1PR10MB6563F8D2678DC24937488D80E8B0A@GV1PR10MB6563.EURPRD10.PROD.OUTLOOK.COM> @ 2023-11-16 16:50 ` syzbot 0 siblings, 0 replies; 40+ messages in thread From: syzbot @ 2023-11-16 16:50 UTC (permalink / raw) To: linux-kernel, syzkaller-bugs, yuran.pereira Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-and-tested-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com Tested on: commit: 7475e51b Merge tag 'net-6.7-rc2' of git://git.kernel.o.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=17b8635b680000 kernel config: https://syzkaller.appspot.com/x/.config?x=696dc362ad4818c4 dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 Note: no patches were applied. Note: testing is done by a robot and is best-effort only. ^ permalink raw reply [flat|nested] 40+ messages in thread
* [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout
@ 2023-11-16 11:20 syzbot
0 siblings, 0 replies; 40+ messages in thread
From: syzbot @ 2023-11-16 11:20 UTC (permalink / raw)
To: johan.hedberg, linux-bluetooth, linux-kernel, luiz.dentz, marcel,
syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 8de1e7afcc1c Merge branch 'for-next/core' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=1126f190e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=3e6feaeda5dcbc27
dashboard link: https://syzkaller.appspot.com/bug?extid=4c0d0c4cde787116d465
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=122a2560e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136e08df680000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0f00907f9764/disk-8de1e7af.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0502fe78c60d/vmlinux-8de1e7af.xz
kernel image: https://storage.googleapis.com/syzbot-assets/192135168cc0/Image-8de1e7af.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4c0d0c4cde787116d465@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]
BUG: KASAN: slab-use-after-free in __refcount_add include/linux/refcount.h:193 [inline]
BUG: KASAN: slab-use-after-free in __refcount_inc include/linux/refcount.h:250 [inline]
BUG: KASAN: slab-use-after-free in refcount_inc include/linux/refcount.h:267 [inline]
BUG: KASAN: slab-use-after-free in sock_hold include/net/sock.h:777 [inline]
BUG: KASAN: slab-use-after-free in sco_sock_timeout+0x64/0x25c net/bluetooth/sco.c:88
Write of size 4 at addr ffff0000dba59080 by task kworker/0:1/10
CPU: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events sco_sock_timeout
Call trace:
dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0x174/0x514 mm/kasan/report.c:475
kasan_report+0xd8/0x138 mm/kasan/report.c:588
kasan_check_range+0x254/0x294 mm/kasan/generic.c:187
__kasan_check_write+0x20/0x30 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]
__refcount_add include/linux/refcount.h:193 [inline]
__refcount_inc include/linux/refcount.h:250 [inline]
refcount_inc include/linux/refcount.h:267 [inline]
sock_hold include/net/sock.h:777 [inline]
sco_sock_timeout+0x64/0x25c net/bluetooth/sco.c:88
process_one_work+0x694/0x1204 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x938/0xef4 kernel/workqueue.c:2784
kthread+0x288/0x310 kernel/kthread.c:388
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857
Allocated by task 6180:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:511
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1026 [inline]
__kmalloc+0xcc/0x1b8 mm/slab_common.c:1039
kmalloc include/linux/slab.h:603 [inline]
sk_prot_alloc+0xc4/0x1f0 net/core/sock.c:2090
sk_alloc+0x44/0x3f4 net/core/sock.c:2143
bt_sock_alloc+0x4c/0x32c net/bluetooth/af_bluetooth.c:148
sco_sock_alloc net/bluetooth/sco.c:495 [inline]
sco_sock_create+0xbc/0x31c net/bluetooth/sco.c:526
bt_sock_create+0x14c/0x248 net/bluetooth/af_bluetooth.c:132
__sock_create+0x43c/0x884 net/socket.c:1569
sock_create net/socket.c:1620 [inline]
__sys_socket_create net/socket.c:1657 [inline]
__sys_socket+0x134/0x340 net/socket.c:1708
__do_sys_socket net/socket.c:1722 [inline]
__se_sys_socket net/socket.c:1720 [inline]
__arm64_sys_socket+0x7c/0x94 net/socket.c:1720
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
Freed by task 6179:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
kasan_save_free_info+0x38/0x5c mm/kasan/generic.c:522
____kasan_slab_free+0x144/0x1c0 mm/kasan/common.c:236
__kasan_slab_free+0x18/0x28 mm/kasan/common.c:244
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook mm/slub.c:1826 [inline]
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0x2ac/0x480 mm/slub.c:3822
kfree+0xb8/0x19c mm/slab_common.c:1075
sk_prot_free net/core/sock.c:2126 [inline]
__sk_destruct+0x4c0/0x770 net/core/sock.c:2218
sk_destruct net/core/sock.c:2233 [inline]
__sk_free+0x37c/0x4e8 net/core/sock.c:2244
sk_free+0x60/0xc8 net/core/sock.c:2255
sock_put include/net/sock.h:1989 [inline]
sco_sock_kill+0xfc/0x1b4 net/bluetooth/sco.c:426
sco_sock_release+0x1fc/0x2c0 net/bluetooth/sco.c:1256
__sock_release net/socket.c:659 [inline]
sock_close+0xa4/0x1e8 net/socket.c:1419
__fput+0x324/0x7f8 fs/file_table.c:384
__fput_sync+0x60/0x9c fs/file_table.c:465
__do_sys_close fs/open.c:1572 [inline]
__se_sys_close fs/open.c:1557 [inline]
__arm64_sys_close+0x150/0x1e0 fs/open.c:1557
__invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
The buggy address belongs to the object at ffff0000dba59000
which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 128 bytes inside of
freed 2048-byte region [ffff0000dba59000, ffff0000dba59800)
The buggy address belongs to the physical page:
page:00000000f24a79df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ba58
head:00000000f24a79df order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000840 ffff0000c0002000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0000dba58f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff0000dba59000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff0000dba59080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff0000dba59100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff0000dba59180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 0 PID: 10 at lib/refcount.c:25 refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25
Modules linked in:
CPU: 0 PID: 10 Comm: kworker/0:1 Tainted: G B 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events sco_sock_timeout
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25
lr : refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25
sp : ffff800092d57af0
x29: ffff800092d57af0 x28: 1fffe0001a9b5a4a x27: dfff800000000000
x26: ffff0000c1084008 x25: ffff0000d4dad250 x24: ffff0001b418b500
x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000002
x20: ffff0000dba59080 x19: ffff8000910a2000 x18: ffff800092d57800
x17: 0000000000000000 x16: ffff80008a71b23c x15: 0000000000000001
x14: 1ffff000125aaeb0 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000001 x10: 0000000000000000 x9 : c0b0806111008b00
x8 : c0b0806111008b00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800092d573d8 x4 : ffff80008e4210a0 x3 : ffff800082b180c4
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
refcount_warn_saturate+0x1a8/0x20c lib/refcount.c:25
__refcount_inc include/linux/refcount.h:250 [inline]
refcount_inc include/linux/refcount.h:267 [inline]
sock_hold include/net/sock.h:777 [inline]
sco_sock_timeout+0x19c/0x25c net/bluetooth/sco.c:88
process_one_work+0x694/0x1204 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x938/0xef4 kernel/workqueue.c:2784
kthread+0x288/0x310 kernel/kthread.c:388
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857
irq event stamp: 29659
hardirqs last enabled at (29659): [<ffff80008a719090>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last enabled at (29659): [<ffff80008a719090>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (29658): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569
softirqs last enabled at (19646): [<ffff800080021894>] softirq_handle_end kernel/softirq.c:399 [inline]
softirqs last enabled at (19646): [<ffff800080021894>] __do_softirq+0xac0/0xd54 kernel/softirq.c:582
softirqs last disabled at (19597): [<ffff80008002aadc>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 10 at lib/refcount.c:28 refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 10 Comm: kworker/0:1 Tainted: G B W 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: events sco_sock_timeout
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
lr : refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
sp : ffff800092d57af0
x29: ffff800092d57af0 x28: 1fffe0001a9b5a4a x27: dfff800000000000
x26: ffff0000c1084008 x25: ffff0000d4dad250 x24: ffff0001b418b500
x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000003
x20: ffff0000dba59080 x19: ffff8000910a2000 x18: ffff800092d57800
x17: 0000000000000000 x16: ffff80008a71b23c x15: 0000000000000001
x14: 1fffe0003682f032 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000000000 x9 : c0b0806111008b00
x8 : c0b0806111008b00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800092d573d8 x4 : ffff80008e4210a0 x3 : ffff8000805a359c
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
refcount_warn_saturate+0x1c8/0x20c lib/refcount.c:28
__refcount_sub_and_test include/linux/refcount.h:283 [inline]
__refcount_dec_and_test include/linux/refcount.h:315 [inline]
refcount_dec_and_test include/linux/refcount.h:333 [inline]
sock_put include/net/sock.h:1988 [inline]
sco_sock_timeout+0x1b0/0x25c net/bluetooth/sco.c:100
process_one_work+0x694/0x1204 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x938/0xef4 kernel/workqueue.c:2784
kthread+0x288/0x310 kernel/kthread.c:388
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:857
irq event stamp: 29659
hardirqs last enabled at (29659): [<ffff80008a719090>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline]
hardirqs last enabled at (29659): [<ffff80008a719090>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94
hardirqs last disabled at (29658): [<ffff800080021724>] __do_softirq+0x950/0xd54 kernel/softirq.c:569
softirqs last enabled at (19646): [<ffff800080021894>] softirq_handle_end kernel/softirq.c:399 [inline]
softirqs last enabled at (19646): [<ffff800080021894>] __do_softirq+0xac0/0xd54 kernel/softirq.c:582
softirqs last disabled at (19597): [<ffff80008002aadc>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
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If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 40+ messages in threadend of thread, other threads:[~2024-10-22 19:51 UTC | newest]
Thread overview: 40+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-11-16 14:03 [syzbot] Test on mainline syzbot
2023-11-17 1:01 ` [syzbot] [PATCH] test uaf in sco_sock_timeout syzbot
2023-11-18 3:25 ` [syzbot] [PATCH] Test " syzbot
2023-12-06 3:58 ` [syzbot] [bluetooth?] KASAN: slab-use-after-free Write " syzbot
2024-10-01 19:50 ` [syzbot] Re: [PATCH v1] Bluetooth: SCO: Use disable_delayed_work_sync syzbot
2024-10-02 18:27 ` [syzbot] Re: [PATCH v2] " syzbot
2024-10-02 19:20 ` [syzbot] Re: [PATCH v3] " syzbot
2024-10-02 19:47 ` syzbot
2024-10-02 20:46 ` syzbot
2024-10-03 15:38 ` syzbot
2024-10-03 16:33 ` syzbot
2024-10-03 19:21 ` syzbot
2024-10-04 16:06 ` syzbot
2024-10-04 17:24 ` syzbot
2024-10-07 17:16 ` syzbot
2024-10-07 20:54 ` syzbot
2024-10-22 16:44 ` syzbot
2024-10-22 19:19 ` syzbot
[not found] <CABBYNZJYtnHH1MjnNFdzfvu6jFOypL6iHjQ1Ujh8aYaycZzjFQ@mail.gmail.com>
2024-10-22 19:51 ` [syzbot] [bluetooth?] KASAN: slab-use-after-free Write in sco_sock_timeout syzbot
[not found] <CABBYNZLHhVmQj3R5JS13HTp7KrCrs-HBcRFLqn6AU44uLpbXjA@mail.gmail.com>
2024-10-22 17:15 ` syzbot
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2024-10-07 21:15 ` syzbot
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2024-10-07 17:33 ` syzbot
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2024-10-04 17:40 ` syzbot
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2024-10-03 19:44 ` syzbot
2024-10-03 20:06 ` Luiz Augusto von Dentz
[not found] <CABBYNZJGF4156YhdOH5DoZ7hkh1NTrpQwntwJZiYJ9AyHYr14w@mail.gmail.com>
2024-10-03 16:53 ` syzbot
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2024-10-03 15:55 ` syzbot
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2024-10-02 23:16 ` syzbot
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2024-10-01 20:13 ` syzbot
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2023-12-09 13:29 xingwei lee
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2023-11-18 4:14 ` syzbot
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