| TITLE: INFO: task hung in copy_net_ns |
| TYPE: HANG |
| |
| [ 361.246294] INFO: task syz-executor0:6102 blocked for more than 120 seconds. |
| [ 361.253503] Not tainted 4.4.96+ #180 |
| [ 361.257716] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. |
| [ 361.265660] syz-executor0 D ffff8800b901f990 0 6102 1942 0x00000004 |
| [ 361.273110] ffff8800b901f990 ffffffff835a8e78 ffff8800ac111780 0000000000000000 |
| [ 361.281099] 0000000000000000 ffff8801db61f5b8 ffff8801db61f5e0 ffff8801db61ec58 |
| [ 361.289101] ffff8801db61ec40 ffffffff83218200 ffff8800ac111780 ffff8800b9018000 |
| [ 361.297131] Call Trace: |
| [ 361.299714] [<ffffffff829f5a8c>] schedule+0x9c/0x1b0 |
| [ 361.300009] unregister_netdevice: waiting for lo to become free. Usage count = 6 |
| [ 361.312401] [<ffffffff829f6315>] schedule_preempt_disabled+0x15/0x20 |
| [ 361.318972] [<ffffffff829fb0c0>] mutex_lock_nested+0x3b0/0x1130 |
| [ 361.325100] [<ffffffff8223552c>] ? copy_net_ns+0xcc/0x220 |
| [ 361.330709] [<ffffffff814cc088>] ? ___slab_alloc+0x458/0x550 |
| [ 361.336566] [<ffffffff829fad10>] ? mutex_lock_killable_nested+0x1260/0x1260 |
| [ 361.343732] [<ffffffff814cc1de>] ? __slab_alloc+0x5e/0x90 |
| [ 361.349328] [<ffffffff822354cc>] ? copy_net_ns+0x6c/0x220 |
| [ 361.354932] [<ffffffff81229c28>] ? rcu_read_lock_sched_held+0x108/0x120 |
| [ 361.361746] [<ffffffff814cc4b8>] ? kmem_cache_alloc+0x2a8/0x320 |
| [ 361.367875] [<ffffffff822354cc>] ? copy_net_ns+0x6c/0x220 |
| [ 361.373472] [<ffffffff8223552c>] copy_net_ns+0xcc/0x220 |
