WARNING in io_ring_exit_work

Status: upstream: reported syz repro on 2025/06/18 00:00
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+19827bd6deb9b24f655f@syzkaller.appspotmail.com
First crash: 503d, last: 1h07m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2026/10/15 linux-6.6.y (ToT) a91a6aa9253c syz [report] WARNING in io_ring_exit_work
2026/10/15 upstream (ToT) 0fcb05b72344 syz Didn't crash
▶ ▼ Similar bugs (10)
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 557d 685d 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 1211d 1302d 0/3 auto-obsoleted due to no activity on 2023/10/19 11:52
android-6-12 WARNING in io_ring_exit_work -1 1 199d 199d 0/1 auto-obsoleted due to no activity on 2026/07/17 06:56
upstream WARNING in io_ring_exit_work (2) prio:high io-uring -1 syz 12824 1d03h 985d 0/29 upstream: reported syz repro on 2024/02/22 09:35
linux-6.1 WARNING in io_ring_exit_work (3) -1 61 221d 481d 0/3 auto-obsoleted due to no activity on 2026/06/05 18:24
linux-5.15 WARNING in io_ring_exit_work (2) -1 7 195d 199d 0/3 auto-obsoleted due to no activity on 2026/07/31 07:28
linux-5.15 WARNING in io_ring_exit_work -1 9 1203d 1311d 0/3 auto-obsoleted due to no activity on 2023/10/27 08:42
upstream WARNING in io_ring_exit_work io-uring -1 syz, C done done 3550 1284d 2059d 0/29 auto-obsoleted due to no activity on 2023/07/28 02:36
android-6-12 WARNING in io_ring_exit_work (2) -1 14 39d 67d 0/1 premoderation: reported on 2026/08/28 04:27
linux-6.1 WARNING in io_ring_exit_work (4) -1 90 3h11m 104d 0/3 upstream: reported on 2026/07/22 17:40

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1138 at io_uring/io_uring.c:3214 io_ring_exit_work+0x3b9/0x830 io_uring/io_uring.c:3214
Modules linked in:
CPU: 0 PID: 1138 Comm: kworker/u4:7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:io_ring_exit_work+0x3b9/0x830 io_uring/io_uring.c:3214
Code: fd 48 8b 7c 24 40 48 8b 74 24 10 e8 31 02 11 00 48 85 c0 41 bf 00 20 00 00 75 1d e8 e1 c9 fe f6 e9 b1 fd ff ff e8 d7 c9 fe f6 <0f> 0b b8 70 17 00 00 48 89 44 24 10 eb c1 c7 84 24 90 00 00 00 00
RSP: 0000:ffffc900046c7a40 EFLAGS: 00010293
RAX: ffffffff8a88c179 RBX: ffff88807af2e000 RCX: ffff888023d4bc00
RDX: 0000000000000000 RSI: fffffffffffffffc RDI: 0000000000000000
RBP: ffffc900046c7bb0 R08: ffffc900046c79c7 R09: 1ffff920008d8f38
R10: dffffc0000000000 R11: fffff520008d8f39 R12: dffffc0000000000
R13: 0000000100002382 R14: 0000000100002386 R15: ffff88807af2e510
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f11ad9d5300 CR3: 000000000cf32000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 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 (2274):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/28 21:34 linux-6.6.y 79643295eba1 a3c7249d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/03 19:12 linux-6.6.y b5a1dc3ad482 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/03 16:37 linux-6.6.y b5a1dc3ad482 e2d35131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/02 23:19 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/02 20:21 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/02 15:01 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/02 13:52 linux-6.6.y b5a1dc3ad482 6969b601 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/11/01 06:21 linux-6.6.y b5a1dc3ad482 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/31 13:02 linux-6.6.y b5a1dc3ad482 2041d3f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/31 05:48 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/31 01:34 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/30 21:03 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/30 19:57 linux-6.6.y b5a1dc3ad482 0ec395f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/30 01:49 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 23:09 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 21:49 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 20:38 linux-6.6.y 0aebf2870d53 b498adee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 15:31 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 14:08 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 12:11 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 09:06 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 07:58 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/29 06:39 linux-6.6.y 0aebf2870d53 b1d00f76 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/28 17:23 linux-6.6.y 0aebf2870d53 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/28 13:54 linux-6.6.y 0aebf2870d53 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/28 02:11 linux-6.6.y 0aebf2870d53 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/27 22:52 linux-6.6.y 0aebf2870d53 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/27 14:01 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/27 05:35 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/26 22:03 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/26 17:05 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/26 14:59 linux-6.6.y 0aebf2870d53 168cb7a2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/26 10:56 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/26 07:17 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/26 02:12 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/25 07:01 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/25 04:10 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/24 18:06 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/23 22:49 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/23 21:10 linux-6.6.y 0aebf2870d53 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/23 12:52 linux-6.6.y 0aebf2870d53 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/23 10:34 linux-6.6.y 0aebf2870d53 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/23 09:22 linux-6.6.y 0aebf2870d53 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/22 20:52 linux-6.6.y 0aebf2870d53 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/22 16:30 linux-6.6.y 0aebf2870d53 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/22 15:03 linux-6.6.y 0aebf2870d53 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/22 15:03 linux-6.6.y 0aebf2870d53 b55fad29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in io_ring_exit_work
2026/10/22 00:34 linux-6.6.y 0aebf2870d53 4ba27f85 .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.