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: 549d, last: 549d
▶ ▼ Similar bugs (3)
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 677d 819d 0/29 auto-obsoleted due to no activity on 2025/01/07 03:50
upstream INFO: task hung in register_netdevice_notifier_net (4) prio:normal net 1 11 113d 288d 0/29 auto-obsoleted due to no activity on 2026/07/25 21:56
upstream INFO: task hung in register_netdevice_notifier_net (3) net 1 2 410d 437d 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.