INFO: task kworker/u8:3:51 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc1-syzkaller-00115-g33700a0c9b56 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:3    state:D stack:22480 pid:51    tgid:51    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 fib_seq_sum+0x31/0x290 net/core/fib_notifier.c:46
 fib_dump_is_consistent net/core/fib_notifier.c:90 [inline]
 register_fib_notifier+0x2db/0x370 net/core/fib_notifier.c:113
 nsim_fib_create+0x902/0xa70 drivers/net/netdevsim/fib.c:1595
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1480 [inline]
 nsim_dev_reload_up+0x3d1/0x8e0 drivers/net/netdevsim/dev.c:985