syzbot


WARNING in io_ring_exit_work

Status: premoderation: reported on 2026/04/18 06:50
Reported-by: syzbot+c2b4522107e612fa5e40@syzkaller.appspotmail.com
First crash: 7d20h, last: 7d20h
Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in io_ring_exit_work (2) -1 27 365d 493d 0/3 auto-obsoleted due to no activity on 2025/07/04 09:19
linux-6.1 WARNING in io_ring_exit_work -1 5 1019d 1110d 0/3 auto-obsoleted due to no activity on 2023/10/19 11:52
upstream WARNING in io_ring_exit_work (2) io-uring -1 6728 7h55m 793d 0/29 upstream: reported on 2024/02/22 09:35
linux-6.6 WARNING in io_ring_exit_work -1 295 7d11h 312d 0/2 upstream: reported on 2025/06/18 00:00
linux-6.1 WARNING in io_ring_exit_work (3) -1 61 29d 289d 0/3 upstream: reported on 2025/07/10 06:43
linux-5.15 WARNING in io_ring_exit_work (2) -1 7 3d19h 7d16h 0/3 upstream: reported on 2026/04/18 11:03
linux-5.15 WARNING in io_ring_exit_work -1 9 1011d 1119d 0/3 auto-obsoleted due to no activity on 2023/10/27 08:42
upstream WARNING in io_ring_exit_work io-uring -1 C done done 3550 1093d 1867d 0/29 auto-obsoleted due to no activity on 2023/07/28 02:36

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 46 at io_uring/io_uring.c:2994 io_ring_exit_work+0x3ca/0x83b io_uring/io_uring.c:2994
Modules linked in:
CPU: 0 UID: 0 PID: 46 Comm: kworker/u8:2 Not tainted syzkaller #0 de3e1d1c5728fabb050931035751e453f935abb5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:io_ring_exit_work+0x3ca/0x83b io_uring/io_uring.c:2994
Code: 24 48 48 8b 7c 24 40 48 8b 74 24 20 e8 6f a6 9c 04 48 85 c0 4c 8b 6c 24 58 75 1d e8 e0 1d 82 00 e9 a6 fd ff ff e8 d6 1d 82 00 <0f> 0b b8 70 17 00 00 48 89 44 24 20 eb c2 c7 84 24 b0 00 00 00 00
RSP: 0018:ffffc900002ffb40 EFLAGS: 00010293
RAX: ffffffff81058eda RBX: ffff8881006be000 RCX: ffff88810ae7df00
RDX: 0000000000000000 RSI: ffffffffffffffea RDI: 0000000000000000
RBP: ffffc900002ffca0 R08: ffffc900002ffa87 R09: 1ffff9200005ff50
R10: dffffc0000000000 R11: fffff5200005ff51 R12: dffffc0000000000
R13: ffff8881006be010 R14: 0000000100006668 R15: 0000000100006652
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f73dedcc080 CR3: 00000001c5ff2000 CR4: 00000000003526b0
DR0: 0000000000003000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x7d1/0x1020 kernel/workqueue.c:3319
 worker_thread+0xc70/0x10b0 kernel/workqueue.c:3400
 kthread+0x2c6/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
---[ end trace 0000000000000000 ]---

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/18 06:49 android16-6.12 6532ca3bb1f7 5be7a9de .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust WARNING in io_ring_exit_work
* Struck through repros no longer work on HEAD.