unregister_netdevice: waiting for lo to become free. Usage count = 2
ref_tracker: netdev@ffff888113234618 has 1/1 users at
     fib_check_nh+0xc46/0x1910
     rtm_new_nexthop+0x3f03/0x8140
     rtnetlink_rcv_msg+0x7cf/0xb70
     netlink_rcv_skb+0x208/0x470
     netlink_unicast+0x82f/0x9e0
     netlink_sendmsg+0x805/0xb30
     __sock_sendmsg+0x21c/0x270
     ____sys_sendmsg+0x52d/0x830
     ___sys_sendmsg+0x21f/0x2a0
     __sys_sendmmsg+0x227/0x430
     __x64_sys_sendmmsg+0xa0/0xc0
     do_syscall_64+0xfa/0xfa0
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

