syzbot


WARNING in io_ring_exit_work (3)

Status: upstream: reported on 2025/07/10 06:43
Reported-by: syzbot+b3c7334d848a6f979704@syzkaller.appspotmail.com
First crash: 2d20h, last: 2d20h
Similar bugs (6)
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 78d 206d 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 732d 823d 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 1455 2h03m 506d 0/29 upstream: reported on 2024/02/22 09:35
linux-6.6 WARNING in io_ring_exit_work -1 3 11d 25d 0/2 upstream: reported on 2025/06/18 00:00
linux-5.15 WARNING in io_ring_exit_work -1 9 724d 832d 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 806d 1580d 0/29 auto-obsoleted due to no activity on 2023/07/28 02:36

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4864 at io_uring/io_uring.c:2887 io_ring_exit_work+0x314/0x704 io_uring/io_uring.c:2887
Modules linked in:
CPU: 0 PID: 4864 Comm: kworker/u4:41 Not tainted 6.1.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events_unbound io_ring_exit_work
RIP: 0010:io_ring_exit_work+0x314/0x704 io_uring/io_uring.c:2887
Code: 71 f7 48 8b 7c 24 38 48 8b 74 24 18 e8 09 12 11 00 48 85 c0 4c 8b 7c 24 10 75 3f e8 7a 61 71 f7 e9 09 fe ff ff e8 70 61 71 f7 <0f> 0b b8 70 17 00 00 48 89 44 24 18 eb ca 48 8b 4c 24 08 80 e1 07
RSP: 0018:ffffc90003527ac0 EFLAGS: 00010293
RAX: ffffffff8a0f7610 RBX: 0000000100004985 RCX: ffff888077ba1dc0
RDX: 0000000000000000 RSI: ffffffffffffffe5 RDI: 0000000000000000
RBP: ffffc90003527c30 R08: dffffc0000000000 R09: fffff520006a4f49
R10: fffff520006a4f49 R11: 1ffff920006a4f48 R12: dffffc0000000000
R13: 1ffff1100a81fc4c R14: ffff8880540fe260 R15: 00000001000049a0
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e815ff8 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/10 06:42 linux-6.1.y 04d1ccaa9c28 956bd956 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in io_ring_exit_work
* Struck through repros no longer work on HEAD.