INFO: task hung in register_netdevice_notifier

INFO: task hung in register_netdevice_notifier_net (2)

Status: auto-obsoleted due to no activity on 2025/05/15 09:58
Subsystems: kernel
[Documentation on labels]
First crash: 336d, last: 336d

▶ ▼ Similar bugs (2)

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in register_netdevice_notifier_net net	1				7	464d	605d	0/29	auto-obsoleted due to no activity on 2025/01/07 03:50
upstream	INFO: task hung in register_netdevice_notifier_net (3) net	1				2	197d	223d	0/29	auto-obsoleted due to no activity on 2025/10/01 08:57

Sample crash report:

INFO: task kworker/u8:6:1321 blocked for more than 144 seconds.
      Not tainted 6.14.0-rc1-syzkaller-00158-g488fb6effe03 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6    state:D stack:19896 pid:1321  tgid:1321  ppid:2      task_flags:0x4208160 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 rtnl_net_lock include/linux/rtnetlink.h:129 [inline]
 register_netdevice_notifier_net+0x1a/0xa0 net/core/dev.c:2028

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/02/14 09:53	net	488fb6effe03	d9a046cf	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-net-this-kasan-gce	INFO: task hung in register_netdevice_notifier_net

* ~~Struck through~~ repros no longer work on HEAD.