[10648.593599] unregister_netdevice: waiting for w2 to become free. Usage count = 6
[10648.593646] unregister_netdevice: waiting for v3 to become free. Usage count = 6
[10648.593782] unregister_netdevice: waiting for lo to become free. Usage count = 2
[10648.593887] unregister_netdevice: waiting for v4 to become free. Usage count = 11