syzbot


WARNING in l2cap_chan_del

Status: upstream: reported on 2024/03/17 15:15
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+3272785b7a1fc9b510f6@syzkaller.appspotmail.com
First crash: 477d, last: 1d04h
Discussions (8)
Title Replies (including bot) Last reply
[syzbot] Monthly bluetooth report (Jun 2025) 0 (1) 2025/06/23 07:31
[syzbot] Monthly bluetooth report (Apr 2025) 0 (1) 2025/04/22 10:11
[syzbot] Monthly bluetooth report (Mar 2025) 0 (1) 2025/03/20 23:48
[syzbot] Monthly bluetooth report (Feb 2025) 0 (1) 2025/02/17 12:44
[syzbot] Monthly bluetooth report (Jan 2025) 0 (1) 2025/01/17 10:35
[syzbot] Monthly bluetooth report (Dec 2024) 0 (1) 2024/12/17 09:47
[syzbot] Monthly bluetooth report (Nov 2024) 0 (1) 2024/11/15 14:41
[syzbot] [bluetooth?] WARNING in l2cap_chan_del 0 (1) 2024/03/17 15:15
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in l2cap_chan_del (2) 1 29d 29d 0/3 upstream: reported on 2025/06/04 04:03
linux-6.1 WARNING in l2cap_chan_del 1 268d 268d 0/3 auto-obsoleted due to no activity on 2025/01/16 12:44
linux-5.15 WARNING in l2cap_chan_del 1 612d 612d 0/3 auto-obsoleted due to no activity on 2024/02/07 22:44
linux-5.15 WARNING in l2cap_chan_del (2) 1 365d 365d 0/3 auto-obsoleted due to no activity on 2024/10/11 21:12

Sample crash report:
------------[ cut here ]------------
workqueue: cannot queue hci_conn_timeout on wq hci4
WARNING: CPU: 1 PID: 5879 at kernel/workqueue.c:2258 __queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Modules linked in:
CPU: 1 UID: 0 PID: 5879 Comm: kworker/1:4 Not tainted 6.16.0-rc2-syzkaller-00378-gb67ec639010f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xd62/0xfe0 kernel/workqueue.c:2256
Code: 42 80 3c 20 00 74 08 4c 89 ef e8 f9 e1 96 00 49 8b 75 00 49 81 c7 78 01 00 00 48 c7 c7 40 e1 89 8b 4c 89 fa e8 5f 34 f9 ff 90 <0f> 0b 90 90 e9 f1 f4 ff ff e8 40 8a 35 00 90 0f 0b 90 e9 dd fc ff
RSP: 0018:ffffc90004caf7a8 EFLAGS: 00010046
RAX: 0deecd63f176f300 RBX: 0000000000000020 RCX: ffff88802f003c00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100af15f38 R08: ffff8880b8724293 R09: 1ffff110170e4852
R10: dffffc0000000000 R11: ffffed10170e4853 R12: dffffc0000000000
R13: ffff888031af4960 R14: ffff88801a494408 R15: ffff8880578af978
FS:  0000000000000000(0000) GS:ffff888125d85000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006680 CR3: 00000000589a6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_delayed_work_on+0x18b/0x280 kernel/workqueue.c:2561
 l2cap_chan_del+0x285/0x5e0 net/bluetooth/l2cap_core.c:671
 l2cap_chan_close+0x597/0x980 net/bluetooth/l2cap_core.c:-1
 l2cap_chan_timeout+0x158/0x390 net/bluetooth/l2cap_core.c:431
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (268):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/22 23:21 upstream b67ec639010f d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in l2cap_chan_del
2025/06/14 20:07 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in l2cap_chan_del
2025/06/12 06:05 upstream 488ef3560196 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in l2cap_chan_del
2025/05/15 12:31 upstream 546bce579204 d6b2ee52 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in l2cap_chan_del
2025/05/12 18:58 upstream 82f2b0b97b36 f6671af7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in l2cap_chan_del
2025/02/19 08:49 upstream 6537cfb395f3 9a14138f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in l2cap_chan_del
2024/04/10 21:05 upstream fe46a7dd189e 4320ec32 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in l2cap_chan_del
2025/02/03 22:21 upstream 2014c95afece a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in l2cap_chan_del
2025/06/27 07:32 upstream f02769e7f272 803ce19b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/26 00:03 upstream 92ca6c498a5e 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/24 07:39 upstream 78f4e737a53e e2f27c35 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in l2cap_chan_del
2025/06/22 14:43 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/21 11:02 upstream 11313e2f7812 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/15 14:46 upstream 8c6bc74c7f89 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/13 19:41 upstream 27605c8c0f69 1f72c409 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in l2cap_chan_del
2025/06/10 06:01 upstream 19272b37aa4f 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/09 11:20 upstream 19272b37aa4f 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in l2cap_chan_del
2025/06/09 08:06 upstream 939f15e640f1 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/06 16:03 upstream e271ed52b344 3d899f2c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/06 04:21 upstream e271ed52b344 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/06 00:12 upstream e271ed52b344 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/06/03 17:40 upstream 546b1c9e93c2 a30356b7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/31 04:51 upstream 8477ab143069 3d2f584d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/27 07:52 upstream 785cdec46e92 874a1386 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/26 11:48 upstream 0ff41df1cb26 874a1386 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/25 13:09 upstream d0c22de9995b ed351ea7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/21 04:35 upstream b36ddb9210e6 b47f9e02 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/21 00:55 upstream b36ddb9210e6 b47f9e02 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/17 06:32 upstream 3c21441eeffc f41472b0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/11 16:05 upstream 3ce9925823c7 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/05/11 08:22 upstream 3ce9925823c7 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_chan_del
2025/07/02 19:44 upstream b4911fb0b060 0cd59a8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/30 11:20 upstream d0b3b7b22dfa fc9d8ee5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/26 14:49 upstream ee88bddf7f2f 1ae8177e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/25 13:54 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/25 05:20 upstream 7595b66ae9de 26d77996 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/22 08:15 upstream 739a6c93cc75 d6cdfb8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/08 21:36 upstream 939f15e640f1 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/08 04:48 upstream 8630c59e9936 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/01 14:48 upstream 7d4e49a77d99 3d2f584d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/05/31 07:11 upstream 8477ab143069 3d2f584d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/05/30 02:15 upstream 9d230d500b0e 3d2f584d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/05/27 13:01 upstream 785cdec46e92 874a1386 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/05/24 13:38 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/05/24 11:55 upstream 4856ebd99715 ed351ea7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/05/10 19:46 upstream 1a33418a69cc 77908e5f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2024/03/13 15:10 upstream b0546776ad3f f919f202 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in l2cap_chan_del
2025/06/27 10:27 net e34a79b96ab9 803ce19b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in l2cap_chan_del
2025/06/01 06:45 net 558428921edd 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in l2cap_chan_del
2025/05/29 04:41 net 57a92d14659d 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in l2cap_chan_del
2025/05/16 16:42 net c39b1bb5bc6d cfde8269 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in l2cap_chan_del
2025/06/29 14:51 net-next 20a0c20f82ac fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/06/19 09:05 net-next 253833da4e56 ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/06/18 01:26 net-next d74520f39cdb 417d98fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/06/12 21:08 net-next 5d6d67c4cb10 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/06/07 02:39 net-next 2c7e4a2663a1 f61267d4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/05/29 22:45 net-next 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/05/28 20:53 net-next f6bd8faeb113 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/05/28 08:12 net-next 6682bfc1b227 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/05/22 22:39 net-next 3da895b23901 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2025/05/14 00:07 net-next 9f607dc39b66 7344edeb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in l2cap_chan_del
2024/11/05 21:10 linux-next 850f22c42f4b 3a465482 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in l2cap_chan_del
* Struck through repros no longer work on HEAD.