* [syzbot] BUG: Address NUM::fb on device lo is missing its host route.
@ 2026-08-23 15:56 syzbot
2026-09-28 15:18 ` Forwarded: test syzbot
0 siblings, 1 reply; 30+ messages in thread
From: syzbot @ 2026-08-23 15:56 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: b126f6f5940f Merge tag 'x86_mm_for_7.3-rc1' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15d26e79580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5c9120c514e57ada
dashboard link: https://syzkaller.appspot.com/bug?extid=57f410c9a4f8d7a441d6
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
userspace arch: i386
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17ac7815580000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-b126f6f5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/93496da690a1/vmlinux-b126f6f5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/239dcaeff1b9/bzImage-b126f6f5.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+57f410c9a4f8d7a441d6@syzkaller.appspotmail.com
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
IPv6: BUG: Address 2001::fb on device lo is missing its host route.
---
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^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2026-08-23 15:56 [syzbot] BUG: Address NUM::fb on device lo is missing its host route syzbot
@ 2026-09-28 15:18 ` syzbot
0 siblings, 0 replies; 30+ messages in thread
From: syzbot @ 2026-09-28 15:18 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
Author: idosch@nvidia.com
#syz test
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c90ee6dd7446..e1e672ada7e7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3908,9 +3908,12 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister)
}
/* combine the user config with event to determine if permanent
- * addresses are to be removed from address hash table
+ * addresses are to be removed from address hash table. IPv6 cannot
+ * operate below IPV6_MIN_MTU, so treat that like disable_ipv6 and do
+ * not keep addresses without their host routes.
*/
- if (!unregister && !idev->cnf.disable_ipv6) {
+ if (!unregister && !idev->cnf.disable_ipv6 &&
+ dev->mtu >= IPV6_MIN_MTU) {
/* aggregate the system setting and interface setting */
int _keep_addr = READ_ONCE(net->ipv6.devconf_all->keep_addr_on_down);
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2026-08-07 12:56 [syzbot] BUG: Address fc00:: on device lo is missing its host route syzbot
@ 2026-09-28 15:18 ` syzbot
0 siblings, 0 replies; 30+ messages in thread
From: syzbot @ 2026-09-28 15:18 UTC (permalink / raw)
To: linux-kernel, syzkaller-bugs
For archival purposes, forwarding an incoming command email to
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***
Subject: test
Author: idosch@nvidia.com
#syz test
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c90ee6dd7446..e1e672ada7e7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3908,9 +3908,12 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister)
}
/* combine the user config with event to determine if permanent
- * addresses are to be removed from address hash table
+ * addresses are to be removed from address hash table. IPv6 cannot
+ * operate below IPV6_MIN_MTU, so treat that like disable_ipv6 and do
+ * not keep addresses without their host routes.
*/
- if (!unregister && !idev->cnf.disable_ipv6) {
+ if (!unregister && !idev->cnf.disable_ipv6 &&
+ dev->mtu >= IPV6_MIN_MTU) {
/* aggregate the system setting and interface setting */
int _keep_addr = READ_ONCE(net->ipv6.devconf_all->keep_addr_on_down);
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2026-08-07 12:01 [syzbot] [kernel?] INFO: task hung in copy_ipcs syzbot
@ 2026-08-11 5:59 ` syzbot
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From: syzbot @ 2026-08-11 5:59 UTC (permalink / raw)
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***
Subject: test
Author: ihaveihaveihavea@gmail.com
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
master
Testing patch for syzbot bug 97a62389c5611b0477f3.
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* Forwarded: test
2026-07-28 13:31 [syzbot] [fs?] possible deadlock in configfs_rmdir syzbot
@ 2026-07-31 10:51 ` syzbot
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2026-07-29 0:19 [syzbot] [fs?] general protection fault in start_dirop syzbot
2026-07-29 13:59 ` Forwarded: test syzbot
@ 2026-07-29 14:59 ` syzbot
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2026-07-29 0:19 [syzbot] [fs?] general protection fault in start_dirop syzbot
@ 2026-07-29 13:59 ` syzbot
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2026-07-06 21:44 [syzbot] [netfs?] WARNING in netfs_writepages (3) syzbot
2026-07-07 5:34 ` Forwarded: test syzbot
@ 2026-07-24 6:44 ` syzbot
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2024-08-16 5:17 [syzbot] [xfs?] INFO: task hung in xfs_buf_item_unpin (2) syzbot
@ 2026-07-13 14:52 ` syzbot
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* Forwarded: test
2024-08-28 0:09 [syzbot] [nbd?] INFO: task hung in nbd_queue_rq syzbot
@ 2026-07-07 11:25 ` syzbot
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2026-07-06 21:44 [syzbot] [netfs?] WARNING in netfs_writepages (3) syzbot
@ 2026-07-07 5:34 ` syzbot
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2025-11-13 8:08 [syzbot] [ext4?] possible deadlock in ext4_xattr_set_handle (7) syzbot
@ 2026-06-09 8:41 ` syzbot
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2026-06-04 21:33 [syzbot] [overlayfs?] [ext4?] possible deadlock in lock_two_nondirectories (2) syzbot
@ 2026-06-08 15:46 ` syzbot
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2026-05-31 1:20 [syzbot] [block?] general protection fault in ublk_queue_rq syzbot
@ 2026-06-01 18:58 ` syzbot
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* Forwarded: test
2026-05-19 18:53 [syzbot] [net?] possible deadlock in __sk_receive_skb syzbot
` (2 preceding siblings ...)
2026-05-20 10:27 ` syzbot
@ 2026-05-20 14:33 ` syzbot
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#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2026-05-19 18:53 [syzbot] [net?] possible deadlock in __sk_receive_skb syzbot
2026-05-20 2:05 ` Forwarded: test syzbot
2026-05-20 9:15 ` syzbot
@ 2026-05-20 10:27 ` syzbot
2026-05-20 14:33 ` syzbot
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#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2026-05-19 11:56 [syzbot] [net?] WARNING in netif_rx_mode_run syzbot
2026-05-19 12:49 ` Forwarded: test syzbot
@ 2026-05-20 9:34 ` syzbot
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#syz test
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* Forwarded: test
2026-05-19 18:53 [syzbot] [net?] possible deadlock in __sk_receive_skb syzbot
2026-05-20 2:05 ` Forwarded: test syzbot
@ 2026-05-20 9:15 ` syzbot
2026-05-20 10:27 ` syzbot
2026-05-20 14:33 ` syzbot
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* Forwarded: test
2026-05-19 18:53 [syzbot] [net?] possible deadlock in __sk_receive_skb syzbot
@ 2026-05-20 2:05 ` syzbot
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2026-05-19 11:56 [syzbot] [net?] WARNING in netif_rx_mode_run syzbot
@ 2026-05-19 12:49 ` syzbot
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* Forwarded: test
2026-05-18 1:17 [syzbot] [media?] KASAN: slab-use-after-free Read in dvb_frontend_open syzbot
2026-05-18 11:19 ` Forwarded: test syzbot
@ 2026-05-19 0:36 ` syzbot
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#syz test
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2026-05-18 1:17 [syzbot] [media?] KASAN: slab-use-after-free Read in dvb_frontend_open syzbot
@ 2026-05-18 11:19 ` syzbot
2026-05-19 0:36 ` syzbot
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Subject: test
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* Forwarded: test
2023-01-16 16:40 [syzbot] possible deadlock in br_multicast_rcv (3) syzbot
@ 2026-04-23 16:10 ` syzbot
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Subject: test
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#syz test
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2025-04-30 13:26 [syzbot] [jfs?] UBSAN: shift-out-of-bounds in jfs_statfs (3) syzbot
@ 2025-11-20 15:15 ` syzbot
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Subject: test
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#syz test
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* Forwarded: test
2025-04-30 21:08 [syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbSplit (3) syzbot
@ 2025-11-19 2:55 ` syzbot
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Subject: test
Author: yun.zhou@windriver.com
#syz test
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* Forwarded: test
2024-10-03 19:10 [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in dtInsertEntry syzbot
@ 2025-11-18 14:11 ` syzbot
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Subject: test
Author: yun.zhou@windriver.com
#syz test
diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index ba71eb5ced56..391c0d28e1bc 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -165,7 +165,7 @@ struct linelock {
u8 l2linesize; /* 1: log2 of linesize */
/* (8) */
- struct lv lv[20]; /* 40: */
+ struct lv lv[]; /* 40: */
}; /* (48) */
#define dt_lock linelock
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2025-11-07 7:29 [syzbot] [jfs?] general protection fault in txCommit (2) syzbot
2025-11-14 13:48 ` Forwarded: test syzbot
@ 2025-11-14 14:36 ` syzbot
1 sibling, 0 replies; 30+ messages in thread
From: syzbot @ 2025-11-14 14:36 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
Author: yun.zhou@windriver.com
#syz test
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2025-11-07 7:29 [syzbot] [jfs?] general protection fault in txCommit (2) syzbot
@ 2025-11-14 13:48 ` syzbot
2025-11-14 14:36 ` syzbot
1 sibling, 0 replies; 30+ messages in thread
From: syzbot @ 2025-11-14 13:48 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
Author: yun.zhou@windriver.com
#syz test
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2025-11-01 17:24 [syzbot] [jfs?] stack segment fault in dbUpdatePMap syzbot
@ 2025-11-10 11:30 ` syzbot
0 siblings, 0 replies; 30+ messages in thread
From: syzbot @ 2025-11-10 11:30 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
Author: yun.zhou@windriver.com
#syz test
^ permalink raw reply [flat|nested] 30+ messages in thread
* Forwarded: test
2025-09-30 20:29 [syzbot] [rdma?] KMSAN: uninit-value in ib_nl_handle_ip_res_resp syzbot
@ 2025-11-06 19:28 ` syzbot
0 siblings, 0 replies; 30+ messages in thread
From: syzbot @ 2025-11-06 19:28 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
Author: kriish.sharma2006@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
566771afc7a8
^ permalink raw reply [flat|nested] 30+ messages in thread
end of thread, other threads:[~2026-09-28 15:18 UTC | newest]
Thread overview: 30+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2026-08-23 15:56 [syzbot] BUG: Address NUM::fb on device lo is missing its host route syzbot
2026-09-28 15:18 ` Forwarded: test syzbot
-- strict thread matches above, loose matches on Subject: below --
2026-08-07 12:56 [syzbot] BUG: Address fc00:: on device lo is missing its host route syzbot
2026-09-28 15:18 ` Forwarded: test syzbot
2026-08-07 12:01 [syzbot] [kernel?] INFO: task hung in copy_ipcs syzbot
2026-08-11 5:59 ` Forwarded: test syzbot
2026-07-29 0:19 [syzbot] [fs?] general protection fault in start_dirop syzbot
2026-07-29 13:59 ` Forwarded: test syzbot
2026-07-29 14:59 ` syzbot
2026-07-28 13:31 [syzbot] [fs?] possible deadlock in configfs_rmdir syzbot
2026-07-31 10:51 ` Forwarded: test syzbot
2026-07-06 21:44 [syzbot] [netfs?] WARNING in netfs_writepages (3) syzbot
2026-07-07 5:34 ` Forwarded: test syzbot
2026-07-24 6:44 ` syzbot
2026-06-04 21:33 [syzbot] [overlayfs?] [ext4?] possible deadlock in lock_two_nondirectories (2) syzbot
2026-06-08 15:46 ` Forwarded: test syzbot
2026-05-31 1:20 [syzbot] [block?] general protection fault in ublk_queue_rq syzbot
2026-06-01 18:58 ` Forwarded: test syzbot
2026-05-19 18:53 [syzbot] [net?] possible deadlock in __sk_receive_skb syzbot
2026-05-20 2:05 ` Forwarded: test syzbot
2026-05-20 9:15 ` syzbot
2026-05-20 10:27 ` syzbot
2026-05-20 14:33 ` syzbot
2026-05-19 11:56 [syzbot] [net?] WARNING in netif_rx_mode_run syzbot
2026-05-19 12:49 ` Forwarded: test syzbot
2026-05-20 9:34 ` syzbot
2026-05-18 1:17 [syzbot] [media?] KASAN: slab-use-after-free Read in dvb_frontend_open syzbot
2026-05-18 11:19 ` Forwarded: test syzbot
2026-05-19 0:36 ` syzbot
2025-11-13 8:08 [syzbot] [ext4?] possible deadlock in ext4_xattr_set_handle (7) syzbot
2026-06-09 8:41 ` Forwarded: test syzbot
2025-11-07 7:29 [syzbot] [jfs?] general protection fault in txCommit (2) syzbot
2025-11-14 13:48 ` Forwarded: test syzbot
2025-11-14 14:36 ` syzbot
2025-11-01 17:24 [syzbot] [jfs?] stack segment fault in dbUpdatePMap syzbot
2025-11-10 11:30 ` Forwarded: test syzbot
2025-09-30 20:29 [syzbot] [rdma?] KMSAN: uninit-value in ib_nl_handle_ip_res_resp syzbot
2025-11-06 19:28 ` Forwarded: test syzbot
2025-04-30 21:08 [syzbot] [jfs?] UBSAN: shift-out-of-bounds in dbSplit (3) syzbot
2025-11-19 2:55 ` Forwarded: test syzbot
2025-04-30 13:26 [syzbot] [jfs?] UBSAN: shift-out-of-bounds in jfs_statfs (3) syzbot
2025-11-20 15:15 ` Forwarded: test syzbot
2024-10-03 19:10 [syzbot] [jfs?] UBSAN: array-index-out-of-bounds in dtInsertEntry syzbot
2025-11-18 14:11 ` Forwarded: test syzbot
2024-08-28 0:09 [syzbot] [nbd?] INFO: task hung in nbd_queue_rq syzbot
2026-07-07 11:25 ` Forwarded: test syzbot
2024-08-16 5:17 [syzbot] [xfs?] INFO: task hung in xfs_buf_item_unpin (2) syzbot
2026-07-13 14:52 ` Forwarded: test syzbot
2023-01-16 16:40 [syzbot] possible deadlock in br_multicast_rcv (3) syzbot
2026-04-23 16:10 ` Forwarded: test syzbot
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