unregister_netdevice: waiting for lo to become free. Usage count = 7
ref_tracker: netdev@ffff88804a9c6700 has 1/6 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4531 [inline]
     netdev_hold include/linux/netdevice.h:4560 [inline]
     dst_init+0xda/0x5b0 net/core/dst.c:52
     dst_alloc+0xbb/0x1a0 net/core/dst.c:94
     ip6_dst_alloc net/ipv6/route.c:343 [inline]
     ip6_rt_pcpu_alloc net/ipv6/route.c:1424 [inline]
     rt6_make_pcpu_route net/ipv6/route.c:1473 [inline]
     ip6_pol_route+0x9fd/0x1310 net/ipv6/route.c:2336
     pol_lookup_func include/net/ip6_fib.h:670 [inline]
     fib6_rule_lookup+0x24c/0x720 net/ipv6/fib6_rules.c:123
     ip6_route_output_flags_noref net/ipv6/route.c:2716 [inline]
     ip6_route_output_flags+0x1d0/0x650 net/ipv6/route.c:2728
     ip6_route_output include/net/ip6_route.h:100 [inline]
     ip6_dst_lookup_tail.constprop.0+0x95b/0x2110 net/ipv6/ip6_output.c:1160
     ip6_dst_lookup_flow+0x122/0x240 net/ipv6/ip6_output.c:1293
     ip6_datagram_dst_update+0x7ab/0xf80 net/ipv6/datagram.c:97
     __ip6_datagram_connect+0xb0c/0x1500 net/ipv6/datagram.c:256
     l2tp_ip6_connect+0x1b0/0x450 net/l2tp/l2tp_ip6.c:421
     inet_dgram_connect+0x143/0x200 net/ipv4/af_inet.c:599
     connect_socket net/socket.c:2141 [inline]
     connect_socket net/socket.c:2131 [inline]
     __sys_connect_file+0x146/0x1a0 net/socket.c:2166
     __sys_connect+0x141/0x170 net/socket.c:2183
     __do_sys_connect net/socket.c:2189 [inline]
     __se_sys_connect net/socket.c:2186 [inline]
     __ia32_sys_connect+0x71/0xb0 net/socket.c:2186
     do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
     __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
     do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316

ref_tracker: netdev@ffff88804a9c6700 has 2/6 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4531 [inline]
     netdev_hold include/linux/netdevice.h:4560 [inline]
     dst_init+0xda/0x5b0 net/core/dst.c:52
     dst_alloc+0xbb/0x1a0 net/core/dst.c:94
     ip6_dst_alloc net/ipv6/route.c:343 [inline]
     ip6_rt_pcpu_alloc net/ipv6/route.c:1424 [inline]
     rt6_make_pcpu_route net/ipv6/route.c:1473 [inline]
     ip6_pol_route+0x9fd/0x1310 net/ipv6/route.c:2336
     pol_lookup_func include/net/ip6_fib.h:670 [inline]
     fib6_rule_lookup+0x24c/0x720 net/ipv6/fib6_rules.c:123
     ip6_route_output_flags_noref net/ipv6/route.c:2716 [inline]
     ip6_route_output_flags+0x1d0/0x650 net/ipv6/route.c:2728
     ip6_dst_lookup_tail.constprop.0+0x116/0x2110 net/ipv6/ip6_output.c:1188
     ip6_dst_lookup_flow+0x122/0x240 net/ipv6/ip6_output.c:1293
     send6+0x5dc/0xc40 drivers/net/wireguard/socket.c:139
     wg_socket_send_skb_to_peer+0xf6/0x210 drivers/net/wireguard/socket.c:177
     wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline]
     wg_packet_tx_worker+0x199/0x7f0 drivers/net/wireguard/send.c:276
     process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
     process_scheduled_works kernel/workqueue.c:3479 [inline]
     worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
     kthread+0x373/0x450 kernel/kthread.c:436
     ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
     ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

ref_tracker: netdev@ffff88804a9c6700 has 1/6 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4531 [inline]
     netdev_hold include/linux/netdevice.h:4560 [inline]
     dst_init+0xda/0x5b0 net/core/dst.c:52
     dst_alloc+0xbb/0x1a0 net/core/dst.c:94
     ip6_dst_alloc net/ipv6/route.c:343 [inline]
     ip6_rt_pcpu_alloc net/ipv6/route.c:1424 [inline]
     rt6_make_pcpu_route net/ipv6/route.c:1473 [inline]
     ip6_pol_route+0x9fd/0x1310 net/ipv6/route.c:2336
     pol_lookup_func include/net/ip6_fib.h:670 [inline]
     fib6_rule_lookup+0x24c/0x720 net/ipv6/fib6_rules.c:123
     ip6_route_output_flags_noref net/ipv6/route.c:2716 [inline]
     ip6_route_output_flags+0x1d0/0x650 net/ipv6/route.c:2728
     ip6_route_output include/net/ip6_route.h:100 [inline]
     ip6_dst_lookup_tail.constprop.0+0x95b/0x2110 net/ipv6/ip6_output.c:1160
     ip6_dst_lookup_flow+0x122/0x240 net/ipv6/ip6_output.c:1293
     send6+0x5dc/0xc40 drivers/net/wireguard/socket.c:139
     wg_socket_send_skb_to_peer+0xf6/0x210 drivers/net/wireguard/socket.c:177
     wg_socket_send_buffer_to_peer+0x148/0x1a0 drivers/net/wireguard/socket.c:199
     wg_packet_send_handshake_initiation+0x227/0x360 drivers/net/wireguard/send.c:40
     wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
     process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
     process_scheduled_works kernel/workqueue.c:3479 [inline]
     worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
     kthread+0x373/0x450 kernel/kthread.c:436
     ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158