INFO: task kworker/u8:1:12 blocked for more than 154 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00164-g34d35b4edbbe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:22032 pid:12    tgid:12    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773
 __nsim_dev_port_del+0x14b/0x1b0 drivers/net/netdevsim/dev.c:1428