unregister_netdevice: waiting for lo to become free. Usage count = 64
ref_tracker: lo@ffff888062d40620 has 59/63 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     dst_init+0xee/0x490 net/core/dst.c:52
     dst_alloc+0x14f/0x190 net/core/dst.c:93
     rt_dst_clone+0x52/0x650 net/ipv4/route.c:1640
     ip_mc_finish_output+0x102/0x570 net/ipv4/ip_output.c:356
     NF_HOOK include/linux/netfilter.h:314 [inline]
     ip_mc_output+0x3e1/0x5c0 net/ipv4/ip_output.c:416
     iptunnel_xmit+0x540/0x9b0 net/ipv4/ip_tunnel_core.c:82
     udp_tunnel_xmit_skb+0x234/0x350 net/ipv4/udp_tunnel_core.c:173
     tipc_udp_xmit+0x5b6/0xa10 net/tipc/udp_media.c:198
     tipc_udp_send_msg+0x26b/0x3d0 net/tipc/udp_media.c:271
     tipc_bearer_xmit_skb+0x2f5/0x460 net/tipc/bearer.c:575
     tipc_disc_timeout+0x5ee/0x760 net/tipc/discover.c:338
     call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794
     expire_timers kernel/time/timer.c:1845 [inline]
     __run_timers kernel/time/timer.c:2419 [inline]
     __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
     run_timer_base kernel/time/timer.c:2439 [inline]
     run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
     handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
     __do_softirq kernel/softirq.c:588 [inline]
     invoke_softirq kernel/softirq.c:428 [inline]
     __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637

ref_tracker: lo@ffff888062d40620 has 3/63 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     dst_init+0xee/0x490 net/core/dst.c:52
     dst_alloc+0x14f/0x190 net/core/dst.c:93
     rt_dst_clone+0x52/0x650 net/ipv4/route.c:1640
     ip_mc_finish_output+0x102/0x570 net/ipv4/ip_output.c:356
     NF_HOOK include/linux/netfilter.h:314 [inline]
     ip_mc_output+0x3e1/0x5c0 net/ipv4/ip_output.c:416
     iptunnel_xmit+0x540/0x9b0 net/ipv4/ip_tunnel_core.c:82
     udp_tunnel_xmit_skb+0x234/0x350 net/ipv4/udp_tunnel_core.c:173
     tipc_udp_xmit+0x5b6/0xa10 net/tipc/udp_media.c:198
     tipc_udp_send_msg+0x26b/0x3d0 net/tipc/udp_media.c:271
     tipc_bearer_xmit_skb+0x2f5/0x460 net/tipc/bearer.c:575
     tipc_disc_timeout+0x5ee/0x760 net/tipc/discover.c:338
     call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794
     expire_timers kernel/time/timer.c:1845 [inline]
     __run_timers kernel/time/timer.c:2419 [inline]
     __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
     run_timer_base kernel/time/timer.c:2439 [inline]
     run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
     handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
     do_softirq+0x11b/0x1e0 kernel/softirq.c:455

ref_tracker: lo@ffff888062d40620 has 1/63 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     dst_init+0xee/0x490 net/core/dst.c:52
     dst_alloc+0x14f/0x190 net/core/dst.c:93
     rt_dst_clone+0x52/0x650 net/ipv4/route.c:1640
     ip_mc_finish_output+0x102/0x570 net/ipv4/ip_output.c:356
     NF_HOOK include/linux/netfilter.h:314 [inline]
     ip_mc_output+0x3e1/0x5c0 net/ipv4/ip_output.c:416
     iptunnel_xmit+0x540/0x9b0 net/ipv4/ip_tunnel_core.c:82
     udp_tunnel_xmit_skb+0x234/0x350 net/ipv4/udp_tunnel_core.c:173
     tipc_udp_xmit+0x5b6/0xa10 net/tipc/udp_media.c:198
     tipc_udp_send_msg+0x26b/0x3d0 net/tipc/udp_media.c:271
     tipc_bearer_xmit_skb+0x2f5/0x460 net/tipc/bearer.c:575
     tipc_enable_bearer net/tipc/bearer.c:366 [inline]
     __tipc_nl_bearer_enable+0xff8/0x12f0 net/tipc/bearer.c:1047
     tipc_nl_bearer_enable+0x22/0x40 net/tipc/bearer.c:1056
     genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
     genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
     genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
     genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357