syzbot


WARNING in io_ring_exit_work (2)

Status: upstream: reported on 2024/02/22 09:35
Subsystems: io-uring
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+557a278955ff3a4d3938@syzkaller.appspotmail.com
First crash: 872d, last: 2h33m
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision Error
fcb5d69a-1ea4-43bb-b2fd-f871e41c80cb assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in io_ring_exit_work (2) 2026/05/17 14:13 2026/05/17 14:13 2026/05/17 15:02 de5aae85e5f28e2fa1c7deefcc24fe286abe5140

			
		
d21d7186-37b0-483d-b7ba-bcc3e3a2f4a8 repro WARNING in io_ring_exit_work (2) 2026/03/08 04:54 2026/03/08 04:54 2026/03/08 05:03 31e9c887f7dc24e04b3ca70d0d54fc34141844b0

			
		
Discussions (9)
Title Replies (including bot) Last reply
[syzbot] Monthly io-uring report (Jun 2026) 0 (1) 2026/06/30 20:32
[syzbot] Monthly io-uring report (May 2026) 0 (1) 2026/05/30 12:32
[syzbot] Monthly io-uring report (Jan 2026) 0 (1) 2026/01/14 06:52
[syzbot] Monthly io-uring report (Dec 2025) 1 (2) 2025/12/05 04:05
[syzbot] Monthly io-uring report (Jul 2025) 0 (1) 2025/07/03 08:17
[syzbot] Monthly io-uring report (Feb 2025) 0 (1) 2025/02/08 14:50
[syzbot] Monthly io-uring report (Dec 2024) 0 (1) 2024/12/26 09:01
[syzbot] Monthly io-uring report (Apr 2024) 0 (1) 2024/04/15 09:23
[syzbot] [io-uring?] WARNING in io_ring_exit_work (2) 0 (1) 2024/02/22 09:35
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 440d 568d 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 1094d 1185d 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 82d 82d 0/1 premoderation: reported on 2026/04/18 06:50
linux-6.6 WARNING in io_ring_exit_work -1 865 17m 387d 0/2 upstream: reported on 2025/06/18 00:00
linux-6.1 WARNING in io_ring_exit_work (3) -1 61 104d 364d 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 78d 82d 0/3 upstream: reported on 2026/04/18 11:03
linux-5.15 WARNING in io_ring_exit_work -1 9 1086d 1194d 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 1168d 1942d 0/29 auto-obsoleted due to no activity on 2023/07/28 02:36

Sample crash report:
------------[ cut here ]------------
time_after(jiffies, timeout)
WARNING: io_uring/io_uring.c:2365 at io_ring_exit_work+0x4c8/0x990 io_uring/io_uring.c:2365, CPU#0: kworker/u8:0/12
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: iou_exit io_ring_exit_work
RIP: 0010:io_ring_exit_work+0x4c8/0x990 io_uring/io_uring.c:2365
Code: c6 05 47 79 6e 0e 01 48 c7 c7 c0 d5 c7 8b be 25 00 00 00 48 c7 c2 e0 d0 c7 8b e8 a3 7f 76 00 e9 70 fe ff ff e8 b9 a7 9a 00 90 <0f> 0b 90 b8 70 17 00 00 48 89 44 24 38 eb 9a c7 84 24 b0 00 00 00
RSP: 0018:ffffc90000117960 EFLAGS: 00010293
RAX: ffffffff812a9187 RBX: 000000010001547a RCX: ffff88801ca80000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000117af0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f5ef7f R12: dffffc0000000000
R13: 0000000100015474 R14: 0000000000002000 R15: ffff88803b3e0000
FS:  0000000000000000(0000) GS:ffff888125c4a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee70f4e5c CR3: 000000005208a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (7917):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/09 21:00 upstream 2c7c88a412aa 4167ee25 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in io_ring_exit_work
2026/07/09 17:57 upstream 2c7c88a412aa b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/09 14:08 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/09 12:53 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/09 01:28 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/09 01:09 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in io_ring_exit_work
2026/07/08 15:22 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in io_ring_exit_work
2026/07/08 14:53 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/08 13:48 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in io_ring_exit_work
2026/07/08 12:44 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in io_ring_exit_work
2026/07/08 11:38 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in io_ring_exit_work
2026/07/08 02:20 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in io_ring_exit_work
2026/07/08 00:57 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in io_ring_exit_work
2026/07/07 20:08 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in io_ring_exit_work
2026/07/07 07:17 upstream 0e35b9b6ec0f 8e71ce95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/07 06:05 upstream 0e35b9b6ec0f 8e71ce95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/07 05:20 upstream 0e35b9b6ec0f 8e71ce95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in io_ring_exit_work
2026/07/06 13:20 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in io_ring_exit_work
2026/07/06 12:48 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in io_ring_exit_work
2026/07/05 22:37 upstream f105f3631d51 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in io_ring_exit_work
2026/05/16 23:08 upstream 6916d5703ddf de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in io_ring_exit_work
2026/03/08 01:11 upstream 4ae12d8bd9a8 5cb44a80 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in io_ring_exit_work
2025/09/24 22:02 upstream 4ea5af085908 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in io_ring_exit_work
2026/03/27 15:27 upstream 46b513250491 74a13a23 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in io_ring_exit_work
2026/07/06 19:31 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in io_ring_exit_work
2026/07/06 08:44 upstream 8cdeaa50eae8 fcece630 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in io_ring_exit_work
2026/07/06 03:30 upstream f105f3631d51 fcece630 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in io_ring_exit_work
2026/07/05 19:23 upstream f105f3631d51 fcece630 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in io_ring_exit_work
2026/07/05 18:12 upstream 7404ce516372 fcece630 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in io_ring_exit_work
2026/07/05 16:43 upstream 7404ce516372 fcece630 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in io_ring_exit_work
2026/07/10 01:16 upstream a635d6748234 4167ee25 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/09 23:51 upstream 2c7c88a412aa 4167ee25 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/09 16:42 upstream 2c7c88a412aa a0c310a3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/09 11:50 upstream 0e35b9b6ec0f a0c310a3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/09 10:18 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/09 08:09 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/08 23:48 upstream 0e35b9b6ec0f b9f1ceaa .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/08 22:29 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/08 19:50 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/08 18:47 upstream 0e35b9b6ec0f ab40da58 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/08 06:53 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/07 23:38 upstream 0e35b9b6ec0f 88a4b44c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/07 21:57 upstream 0e35b9b6ec0f 76cdc0c0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/07 21:34 upstream 0e35b9b6ec0f 76cdc0c0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/07 17:24 upstream 0e35b9b6ec0f 76cdc0c0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/07 11:06 upstream 0e35b9b6ec0f 8e71ce95 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/07 03:10 upstream 0e35b9b6ec0f 8e71ce95 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/06 23:36 upstream 8cdeaa50eae8 8e71ce95 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/06 20:59 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/06 16:10 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/06 11:30 upstream 8cdeaa50eae8 88b240e4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/07/06 05:14 upstream f105f3631d51 fcece630 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in io_ring_exit_work
2026/02/02 06:56 upstream 9f2693489ef8 6b8752f2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte WARNING in io_ring_exit_work
2025/12/15 16:48 upstream 8f0b4cce4481 a066d2bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64 WARNING in io_ring_exit_work
2025/09/17 15:13 upstream 5aca7966d2a7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-compat WARNING in io_ring_exit_work
2026/07/07 01:05 linux-next 8e9685d3c41c 8e71ce95 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in io_ring_exit_work
2026/07/06 17:19 linux-next 8e9685d3c41c 88b240e4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in io_ring_exit_work
2026/07/06 02:18 linux-next 2b763db0c276 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in io_ring_exit_work
2024/02/18 09:25 linux-next 2c3b09aac00d 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in io_ring_exit_work
2026/02/07 01:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 59e4d31a0470 f20fc9f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in io_ring_exit_work
2026/03/04 03:04 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next 18be4ca5cb4e 4180d919 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-riscv64 WARNING in io_ring_exit_work
* Struck through repros no longer work on HEAD.