From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Zhengping Jiang <jiangzp@google.com>,
Luiz Augusto von Dentz <luiz.von.dentz@intel.com>,
Jakub Kicinski <kuba@kernel.org>, Sasha Levin <sashal@kernel.org>,
marcel@holtmann.org, gustavo@padovan.org,
johan.hedberg@gmail.com, davem@davemloft.net,
linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 14/24] Bluetooth: L2CAP: Fix use-after-free
Date: Sun, 23 Jul 2023 21:33:15 -0400 [thread overview]
Message-ID: <20230724013325.2332084-14-sashal@kernel.org> (raw)
In-Reply-To: <20230724013325.2332084-1-sashal@kernel.org>
From: Zhengping Jiang <jiangzp@google.com>
[ Upstream commit f752a0b334bb95fe9b42ecb511e0864e2768046f ]
Fix potential use-after-free in l2cap_le_command_rej.
Signed-off-by: Zhengping Jiang <jiangzp@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/bluetooth/l2cap_core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 9dd54247029a8..0770286ecf0bc 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -6375,9 +6375,14 @@ static inline int l2cap_le_command_rej(struct l2cap_conn *conn,
if (!chan)
goto done;
+ chan = l2cap_chan_hold_unless_zero(chan);
+ if (!chan)
+ goto done;
+
l2cap_chan_lock(chan);
l2cap_chan_del(chan, ECONNREFUSED);
l2cap_chan_unlock(chan);
+ l2cap_chan_put(chan);
done:
mutex_unlock(&conn->chan_lock);
--
2.39.2
next prev parent reply other threads:[~2023-07-24 1:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-24 1:33 [PATCH AUTOSEL 5.15 01/24] media: v4l2-mem2mem: add lock to protect parameter num_rdy Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 02/24] media: camss: set VFE bpl_alignment to 16 for sdm845 and sm8250 Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 03/24] usb: gadget: u_serial: Avoid spinlock recursion in __gs_console_push Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 04/24] media: platform: mediatek: vpu: fix NULL ptr dereference Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 05/24] thunderbolt: Read retimer NVM authentication status prior tb_retimer_set_inbound_sbtx() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 06/24] xhci: Don't require a valid get_quirks() function pointer during xhci setup Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 07/24] usb: chipidea: imx: don't request QoS for imx8ulp Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 08/24] usb: cdns2: Device side header file for CDNS2 driver Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 09/24] usb: chipidea: imx: add missing USB PHY DPDM wakeup setting Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 10/24] gfs2: Fix possible data races in gfs2_show_options() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 11/24] pcmcia: rsrc_nonstatic: Fix memory leak in nonstatic_release_resource_db() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 12/24] firewire: net: fix use after free in fwnet_finish_incoming_packet() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 13/24] watchdog: sp5100_tco: support Hygon FCH/SCH (Server Controller Hub) Sasha Levin
2023-07-24 1:33 ` Sasha Levin [this message]
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 15/24] Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 16/24] Bluetooth: btusb: Add MT7922 bluetooth ID for the Asus Ally Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 17/24] drm/amdgpu: Fix potential fence use-after-free v2 Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 18/24] fs/ntfs3: Enhance sanity check while generating attr_list Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 19/24] fs: ntfs3: Fix possible null-pointer dereferences in mi_read() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 20/24] fs/ntfs3: Use __GFP_NOWARN allocation at ntfs_load_attr_list() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 21/24] fs/ntfs3: Mark ntfs dirty when on-disk struct is corrupted Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 22/24] ALSA: hda/realtek: Add quirks for Unis H3C Desktop B760 & Q760 Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 23/24] ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync() Sasha Levin
2023-07-24 1:33 ` [PATCH AUTOSEL 5.15 24/24] apparmor: fix use of strcpy in policy_unpack_test Sasha Levin
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