WARNING in process_one_work (2)

Status: upstream: reported on 2026/08/16 05:57
Reported-by: syzbot+cfd70907b3e618414560@syzkaller.appspotmail.com
First crash: 4d15h, last: 4d15h
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in process_one_work -1 syz, C inconclusive 7 2256d 2491d 0/1 upstream: reported C repro on 2019/10/25 11:01
linux-5.15 WARNING in process_one_work origin:upstream -1 syz error 291 115d 1251d 0/3 auto-obsoleted due to no activity on 2026/07/06 10:25
linux-4.19 WARNING in process_one_work (2) -1 1 1446d 1446d 0/1 auto-obsoleted due to no activity on 2023/01/02 02:07
linux-4.19 WARNING in process_one_work -1 syz, C done 9 1893d 2459d 1/1 fixed on 2021/07/14 12:04

Sample crash report:
Bluetooth: hci5: command 0x0406 tx timeout
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7147 at kernel/workqueue.c:1453 __queue_work+0xb46/0xc80 kernel/workqueue.c:1453
Modules linked in:
CPU: 0 PID: 7147 Comm: kworker/0:25 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events hci_cmd_timeout
RIP: 0010:__queue_work+0xb46/0xc80 kernel/workqueue.c:1453
Code: e9 09 fd ff ff 49 8d 4f 5c 80 e1 07 80 c1 03 38 c1 0f 8c 29 fd ff ff 49 8d 7f 5c e8 14 3d 70 00 e9 1b fd ff ff e8 5a 1a 2b 00 <0f> 0b 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 44 1a 2b 00
RSP: 0018:ffffc9000394fae0 EFLAGS: 00010093
RAX: ffffffff814de256 RBX: dffffc0000000000 RCX: ffff88802bc05940
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 0000000000000000
RBP: 0000000000010000 R08: ffff888057130f37 R09: 1ffff1100ae261e6
R10: dffffc0000000000 R11: ffffed100ae261e7 R12: 0000000000000008
R13: 1ffff92000729f70 R14: ffff88807878f1c0 R15: ffff88807878f000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1a1b88a08 CR3: 000000002a76c000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 queue_work_on+0x124/0x1f0 kernel/workqueue.c:1559
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/16 05:57 linux-5.15.y aabd761612db 746171ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in process_one_work
* Struck through repros no longer work on HEAD.