unregister_netdevice: waiting for lo to become free. Usage count = 3
ref_tracker: netdev@ffff88816d1b2618 has 1/1 users at
     ib_device_set_netdev+0x31f/0x6d0
     siw_newlink+0x400/0xde0
     nldev_newlink+0x5bd/0x650
     rdma_nl_rcv+0x6d7/0xa10
     netlink_unicast+0x80f/0x9b0
     netlink_sendmsg+0x813/0xb40
     __sock_sendmsg+0x21c/0x270
     ____sys_sendmsg+0x4d7/0x810
     ___sys_sendmsg+0x2a5/0x360
     __x64_sys_sendmsg+0x1bd/0x2a0
     do_syscall_64+0xf0/0xf80
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

