INFO: task hung in devlink_pernet_pre

INFO: task hung in devlink_pernet_pre_exit (2)

Status: upstream: reported on 2025/06/10 20:38
Reported-by: syzbot+983c422144d245941785@syzkaller.appspotmail.com
First crash: 6d21h, last: 6d21h

▶ ▼ Similar bugs (3)

Kernel	Title	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in devlink_pernet_pre_exit net	1	1336d	1336d	0/28	auto-closed as invalid on 2022/01/18 07:25
upstream	INFO: task hung in devlink_pernet_pre_exit (2) net	32	221d	240d	28/28	fixed on 2024/11/12 23:31
linux-5.15	INFO: task hung in devlink_pernet_pre_exit	1	278d	278d	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.