INFO: task hung in devlink_pernet_pre_exit (2)

Status: auto-obsoleted due to no activity on 2025/09/18 20:38
Reported-by: syzbot+983c422144d245941785@syzkaller.appspotmail.com
First crash: 408d, last: 408d
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in devlink_pernet_pre_exit net 1 1 1737d 1737d 0/29 auto-closed as invalid on 2022/01/18 07:25
upstream INFO: task hung in devlink_pernet_pre_exit (2) net 1 32 622d 641d 28/29 fixed on 2024/11/12 23:31
linux-5.15 INFO: task hung in devlink_pernet_pre_exit 1 1 679d 679d 0/3 auto-obsoleted due to no activity on 2024/12/21 18:04

Sample crash report:
INFO: task syz-executor:7621 blocked for more than 143 seconds.
      Not tainted 5.15.185-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23744 pid: 7621 ppid:     1 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
 __mutex_lock_common+0xc71/0x2390 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 devlink_pernet_pre_exit+0x97/0x300 net/core/devlink.c:11534

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/10 20:38 linux-5.15.y 1c700860e8bc 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan INFO: task hung in devlink_pernet_pre_exit
* Struck through repros no longer work on HEAD.