WARNING in delayed_work_timer_fn

Status: auto-obsoleted due to no activity on 2023/11/02 17:34
Reported-by: syzbot+c9bfdf3d54b66f472eed@syzkaller.appspotmail.com
First crash: 1223d, last: 1120d
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in delayed_work_timer_fn arm -1 syz 312 195d 1153d 0/29 auto-obsoleted due to no activity on 2026/04/16 12:39
upstream WARNING in delayed_work_timer_fn (2) prio:low arm -1 46 19d 99d 0/29 upstream: reported on 2026/05/12 02:53
linux-6.1 WARNING in delayed_work_timer_fn (2) -1 35 502d 982d 0/3 auto-obsoleted due to no activity on 2025/07/13 12:01
linux-6.1 WARNING in delayed_work_timer_fn (3) -1 10 41d 368d 0/3 upstream: reported on 2025/08/15 19:10

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 21 at kernel/workqueue.c:1441 __queue_work+0x10c8/0x136c kernel/workqueue.c:1441
Modules linked in:
CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.1.41-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
pstate: 004000c5 (nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __queue_work+0x10c8/0x136c kernel/workqueue.c:1441
lr : __queue_work+0x10c8/0x136c kernel/workqueue.c:1441
sp : ffff800019c67910
x29: ffff800019c67950 x28: 0000000000000008 x27: dfff800000000000
x26: ffff0000d7f69000 x25: dfff800000000000 x24: 0000000000000100
x23: ffff0000d7f691c0 x22: ffff0000c0a49bc8 x21: 1fffe00018149379
x20: 00000000000b0012 x19: ffff0000d80a6250 x18: ffff800019c67340
x17: 0000000000000000 x16: ffff800012114b4c x15: 0000000000029942
x14: 1ffff00002aba0b0 x13: dfff800000000000 x12: 000000003c3b4b9d
x11: ff80800008214dbc x10: 0000000000000000 x9 : ffff800008214dbc
x8 : ffff0000c0a49bc0 x7 : ffff8000083fb2ac x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80001423cf60
x2 : ffff0000d80a6250 x1 : 0000000000000100 x0 : 0000000000000000
Call trace:
 __queue_work+0x10c8/0x136c kernel/workqueue.c:1441
 delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:1646
 call_timer_fn+0x1c0/0xa1c kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1514 [inline]
 __run_timers+0x584/0x718 kernel/time/timer.c:1790
 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:1803
 __do_softirq+0x30c/0xea0 kernel/softirq.c:571
 run_ksoftirqd+0x68/0x258 kernel/softirq.c:934
 smpboot_thread_fn+0x4b0/0x96c kernel/smpboot.c:164
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
irq event stamp: 835973
hardirqs last  enabled at (835972): [<ffff8000121f3664>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (835972): [<ffff8000121f3664>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (835973): [<ffff8000121f34c4>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline]
hardirqs last disabled at (835973): [<ffff8000121f34c4>] _raw_spin_lock_irq+0x34/0x9c kernel/locking/spinlock.c:170
softirqs last  enabled at (835058): [<ffff800008020d74>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last  enabled at (835058): [<ffff800008020d74>] __do_softirq+0xc14/0xea0 kernel/softirq.c:600
softirqs last disabled at (835063): [<ffff8000081c9580>] run_ksoftirqd+0x68/0x258 kernel/softirq.c:934
---[ end trace 0000000000000000 ]---

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/25 17:33 linux-6.1.y 5302e81aa209 6756545c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in delayed_work_timer_fn
2023/04/13 17:19 linux-6.1.y 543aff194ab6 3cfcaa1b .config console log report info ci2-linux-6-1-kasan-arm64 WARNING in delayed_work_timer_fn
* Struck through repros no longer work on HEAD.