syzbot


WARNING in io_ring_exit_work

Status: upstream: reported on 2025/06/18 00:00
Reported-by: syzbot+19827bd6deb9b24f655f@syzkaller.appspotmail.com
First crash: 71d, last: 2d12h
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 124d 252d 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 778d 869d 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 2018 4h05m 552d 0/29 upstream: reported on 2024/02/22 09:35
linux-6.1 WARNING in io_ring_exit_work (3) -1 5 4d15h 48d 0/3 upstream: reported on 2025/07/10 06:43
linux-5.15 WARNING in io_ring_exit_work -1 9 770d 878d 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 851d 1626d 0/29 auto-obsoleted due to no activity on 2023/07/28 02:36

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1073 at io_uring/io_uring.c:3213 io_ring_exit_work+0x39e/0x7e0 io_uring/io_uring.c:3213
Modules linked in:
CPU: 0 PID: 1073 Comm: kworker/u4:5 Not tainted 6.6.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:io_ring_exit_work+0x39e/0x7e0 io_uring/io_uring.c:3213
Code: e8 27 a4 20 f7 48 89 df 48 c7 c6 10 da 64 8a 4c 8b 24 24 4c 89 e2 b9 01 00 00 00 e8 ec 79 b5 f9 e9 64 ff ff ff e8 02 a4 20 f7 <0f> 0b b8 70 17 00 00 48 89 44 24 08 eb a6 89 d9 80 e1 07 80 c1 03
RSP: 0018:ffffc90004307a40 EFLAGS: 00010293
RAX: ffffffff8a64e71e RBX: 000000010000ffd9 RCX: ffff888023348000
RDX: 0000000000000000 RSI: ffffffffffffffc6 RDI: 0000000000000000
RBP: ffffc90004307bb0 R08: ffffc900043079c7 R09: 1ffff92000860f38
R10: dffffc0000000000 R11: fffff52000860f39 R12: 000000010000ff9f
R13: ffff88805962e288 R14: ffff88805962e510 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c370c78 CR3: 0000000024b9b000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/25 11:17 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/22 08:33 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/20 19:26 linux-6.6.y bb9c90ab9c5a 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/19 18:28 linux-6.6.y bb9c90ab9c5a 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/18 21:52 linux-6.6.y bb9c90ab9c5a 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/14 20:38 linux-6.6.y 3a8ababb8b6a 5d8c2ac2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/14 20:38 linux-6.6.y 3a8ababb8b6a 5d8c2ac2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/13 00:23 linux-6.6.y 3a8ababb8b6a 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/12 02:26 linux-6.6.y 3a8ababb8b6a c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/12 02:26 linux-6.6.y 3a8ababb8b6a c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/08/01 16:04 linux-6.6.y 3a8ababb8b6a 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/07/01 18:21 linux-6.6.y 3f5b4c104b7d 091a06cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/06/24 21:02 linux-6.6.y 6282921b6825 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2025/06/17 23:08 linux-6.6.y c2603c511feb e77fae15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
* Struck through repros no longer work on HEAD.