INFO: task hung in pwq_release_workfn (2)

Status: auto-obsoleted due to no activity on 2026/04/18 16:17
Subsystems: kernel
[Documentation on labels]
First crash: 221d, last: 221d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
5101cfd1 repro ❓ INFO: task hung in pwq_release_workfn (2) 2026/03/06 13:09 2026/03/06 13:09 2026/03/06 13:19 31e9c887
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in pwq_release_workfn net 1 1 467d 467d 0/29 auto-obsoleted due to no activity on 2025/08/15 06:35

Sample crash report:
INFO: task pool_workqueue_:3 blocked for more than 144 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:pool_workqueue_ state:D stack:27568 pid:3     tgid:3     ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x149b/0x4fd0 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776
 pwq_release_workfn+0x3dc/0x870 kernel/workqueue.c:5127
 kthread_worker_fn+0x4f0/0xb20 kernel/kthread.c:1005
 kthread+0x711/0x8a0 kernel/kthread.c:463

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/18 16:16 upstream e84d960149e7 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in pwq_release_workfn
* Struck through repros no longer work on HEAD.