INFO: task kworker/u4:0:9 blocked for more than 143 seconds.
      Not tainted 6.1.92-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0    state:D stack:20192 pid:9     ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 devlink_nl_port_fill+0x2b1/0xa00 net/devlink/leftover.c:1296
 devlink_port_notify+0xa0/0x1d0 net/devlink/leftover.c:1361
 devl_port_unregister+0x100/0x290 net/devlink/leftover.c:9981
 __nsim_dev_port_del+0x181/0x1b0 drivers/net/netdevsim/dev.c:1432
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1442 [inline]
 nsim_dev_reload_destroy+0x286/0x490 drivers/net/netdevsim/dev.c:1659
 nsim_dev_reload_down+0x94/0xc0 drivers/net/netdevsim/dev.c:965
 devlink_reload+0x1eb/0x6a0 net/devlink/leftover.c:4492
 devlink_pernet_pre_exit+0x14e/0x2c0 net/devlink/leftover.c:12521
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 cleanup_net+0x59c/0xb60 net/core/net_namespace.c:592
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292