unregister_netdevice: waiting for lo to become free. Usage count = 2
ref_tracker: netdev@ffff888067bfe620 has 1/1 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4403 [inline]
     netdev_hold include/linux/netdevice.h:4432 [inline]
     dst_init+0xd9/0x480 net/core/dst.c:52
     dst_alloc+0x12a/0x170 net/core/dst.c:94
     rt_dst_alloc net/ipv4/route.c:1651 [inline]
     __mkroute_output net/ipv4/route.c:2655 [inline]
     ip_route_output_key_hash_rcu+0x14d0/0x25d0 net/ipv4/route.c:2875
     ip_route_output_key_hash+0x18d/0x2a0 net/ipv4/route.c:2705
     __ip_route_output_key include/net/route.h:169 [inline]
     ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2932
     ip_route_connect include/net/route.h:355 [inline]
     tcp_v4_connect+0x81e/0x1a90 net/ipv4/tcp_ipv4.c:256
     tcp_v6_connect+0xbbb/0x1b20 net/ipv6/tcp_ipv6.c:242
     __inet_stream_connect+0x25a/0xdd0 net/ipv4/af_inet.c:679
     inet_stream_connect+0x66/0xa0 net/ipv4/af_inet.c:750
     __sys_connect_file net/socket.c:2089 [inline]
     __sys_connect+0x312/0x450 net/socket.c:2108
     __do_sys_connect net/socket.c:2114 [inline]
     __se_sys_connect net/socket.c:2111 [inline]
     __x64_sys_connect+0x7a/0x90 net/socket.c:2111
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
     entry_SYSCALL_64_after_hwframe+0x77/0x7f