unregister_netdevice: waiting for vxcan1 to become free. Usage count = 4
ref_tracker: vxcan1@ffff888036338610 has 1/1 users at
     ib_device_set_netdev+0x31f/0x6d0
     rxe_register_device+0x1c7/0x310
     rxe_net_add+0x7a/0x100
     rxe_newlink+0xdd/0x190
     nldev_newlink+0x4a5/0x5a0
     rdma_nl_rcv+0x6ae/0x980
     netlink_unicast+0x75b/0x8d0
     netlink_sendmsg+0x805/0xb30
     __sock_sendmsg+0x21c/0x270
     ____sys_sendmsg+0x505/0x830
     ___sys_sendmsg+0x21f/0x2a0
     __x64_sys_sendmsg+0x19b/0x260
     do_syscall_64+0xfa/0x3b0
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

