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: 38d, last: 10d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bluetooth?] WARNING in l2cap_chan_del 0 (1) 2024/03/17 15:15
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 WARNING in l2cap_chan_del 1 173d 173d 0/3 auto-obsoleted due to no activity on 2024/02/07 22:44

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 57 at kernel/workqueue.c:2322 __queue_work+0xc6a/0xec0 kernel/workqueue.c:2321
Modules linked in:
CPU: 0 PID: 57 Comm: kworker/0:2 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events l2cap_chan_timeout
RIP: 0010:__queue_work+0xc6a/0xec0 kernel/workqueue.c:2321
Code: ff e8 1a e5 35 00 eb 21 e8 13 e5 35 00 eb 1a e8 0c e5 35 00 eb 13 e8 05 e5 35 00 90 0f 0b 90 e9 74 fd ff ff e8 f7 e4 35 00 90 <0f> 0b 90 48 83 c4 68 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc9000132f900 EFLAGS: 00010093
RAX: ffffffff815f0f59 RBX: ffff888014c98008 RCX: ffff88801aeeda00
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: 0000000000000020 R08: ffffffff8161eb49 R09: 1ffff1100f20e918
R10: dffffc0000000000 R11: ffffed100f20e919 R12: dffffc0000000000
R13: ffff8880795df1c0 R14: ffff8880795df000 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd79dc7321 CR3: 0000000065b86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_delayed_work_on+0x15a/0x260 kernel/workqueue.c:2595
 l2cap_chan_del+0x291/0x5d0 net/bluetooth/l2cap_core.c:647
 l2cap_chan_close+0x38b/0x9f0
 l2cap_chan_timeout+0x139/0x340 net/bluetooth/l2cap_core.c:432
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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
* Struck through repros no longer work on HEAD.