unregister_netdevice: waiting for lo to become free. Usage count = 310 ref_tracker: lo@ffff88805eed2608 has 295/309 users at __netdev_tracker_alloc include/linux/netdevice.h:4183 [inline] netdev_hold include/linux/netdevice.h:4212 [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:1654 ip_mc_finish_output+0xbe/0x5a0 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+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x262/0x3b0 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+0x187/0x650 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [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+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 ref_tracker: lo@ffff88805eed2608 has 10/309 users at __netdev_tracker_alloc include/linux/netdevice.h:4183 [inline] netdev_hold include/linux/netdevice.h:4212 [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:1654 ip_mc_finish_output+0xbe/0x5a0 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+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x262/0x3b0 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+0x187/0x650 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [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+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 ref_tracker: lo@ffff88805eed2608 has 2/309 users at __netdev_tracker_alloc include/linux/netdevice.h:4183 [inline] netdev_hold include/linux/netdevice.h:4212 [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:1654 ip_mc_finish_output+0xbe/0x5a0 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+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x262/0x3b0 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+0x187/0x650 kernel/time/timer.c:1793 expire_timers kernel/time/timer.c:1844 [inline] __run_timers kernel/time/timer.c:2418 [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+0x2d4/0x9b0 kernel/softirq.c:561 run_ksoftirqd+0xca/0x130 kernel/softirq.c:950 ref_tracker: lo@ffff88805eed2608 has 1/309 users at __netdev_tracker_alloc include/linux/netdevice.h:4183 [inline] netdev_hold include/linux/netdevice.h:4212 [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:1654 ip_mc_finish_output+0xbe/0x5a0 net/ipv4/ip_output.c:356 NF_HOOK include/linux/netfilter.h:314 [inline] ip_mc_output+0x279/0x5c0 net/ipv4/ip_output.c:400 ip_local_out net/ipv4/ip_output.c:130 [inline] ip_send_skb net/ipv4/ip_output.c:1510 [inline] ip_push_pending_frames+0xbf/0x150 net/ipv4/ip_output.c:1530 raw_sendmsg+0x1ae9/0x24a0 net/ipv4/raw.c:657 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:726 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2594 ___sys_sendmsg net/socket.c:2648 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f ref_tracker: lo@ffff88805eed2608 has 1/309 users at __netdev_tracker_alloc include/linux/netdevice.h:4183 [inline] netdev_hold include/linux/netdevice.h:4212 [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:1654 ip_mc_finish_output+0xbe/0x5a0 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+0x55d/0x9b0 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x262/0x3b0 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:2542 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347