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