unregister_netdevice: waiting for eth7 to become free. Usage count = 2
ref_tracker: netdev@ffff88803736c7c0 has 1/1 users at
     fib_create_info+0x2a72/0x3170 net/ipv4/fib_semantics.c:1493
     fib_table_insert+0xcb/0x1b10 net/ipv4/fib_trie.c:1212
     fib_magic+0x43b/0x530 net/ipv4/fib_frontend.c:1128
     fib_add_ifaddr+0x139/0x5d0 net/ipv4/fib_frontend.c:1150
     fib_inetaddr_event+0x12e/0x190 net/ipv4/fib_frontend.c:1464
     notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85
     blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380
     __inet_insert_ifa+0x9ef/0xbc0 net/ipv4/devinet.c:566
     inet_rtm_newaddr+0x102d/0x19e0 net/ipv4/devinet.c:1001
     rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7076
     netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556
     netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
     netlink_unicast+0x7f5/0x990 net/netlink/af_netlink.c:1345
     netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900
     sock_sendmsg_nosec+0x13a/0x180 net/socket.c:775
     __sock_sendmsg net/socket.c:790 [inline]
     ____sys_sendmsg+0x565/0x870 net/socket.c:2684
     ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738