======================================
| [ 3144.665496][   T11] veth_A-C (unregistering): left promiscuous mode
| [ 3157.586169][T14786] geneve_a: left promiscuous mode
| [ 3162.720363][T14801] ovs_br0: left promiscuous mode
| [ 4005.214150][T19302] Initializing XFRM netlink socket
| [ 4489.781574][T21696] unregister_netdevice: waiting for veth_A-R1 to become free. Usage count = 5
[ 4489.782062][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4489.782062][T21696] dst_init (net/core/dst.c:53) 
[4489.782062][T21696] dst_alloc (net/core/dst.c:96) 
[4489.782062][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4489.782062][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4489.782062][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4489.782062][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4489.782062][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4489.782062][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4489.782062][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4489.782062][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4489.782062][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4489.782062][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4489.782062][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4489.782062][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4489.782062][T21696] arp_solicit (net/ipv4/arp.c:392) 
[4489.782062][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [4489.782062][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4489.782062][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4489.782062][T21696] arp_solicit (net/ipv4/arp.c:392) 
| [4489.782062][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [ 4489.782062][T21696]
[ 4489.784752][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4489.784752][T21696] dst_init (net/core/dst.c:53) 
[4489.784752][T21696] dst_alloc (net/core/dst.c:96) 
[4489.784752][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4489.784752][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4489.784752][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4489.784752][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4489.784752][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4489.784752][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4489.784752][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4489.784752][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4489.784752][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4489.784752][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4489.784752][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4489.784752][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4489.784752][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
[4489.784752][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [4489.784752][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4489.784752][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4489.784752][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
| [4489.784752][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [ 4489.784752][T21696]
[ 4489.787122][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4489.787122][T21696] netdev_get_by_index (net/core/dev.c:917) 
[4489.787122][T21696] fib6_nh_init (net/ipv6/route.c:3543) 
[4489.787122][T21696] nh_create_ipv6 (net/ipv4/nexthop.c:2841) 
[4489.787122][T21696] nexthop_create (net/ipv4/nexthop.c:2892) 
[4489.787122][T21696] rtm_new_nexthop (net/ipv4/nexthop.c:2934 net/ipv4/nexthop.c:3220) 
[4489.787122][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4489.787122][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4489.787122][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4489.787122][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4489.787122][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4489.787122][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4489.787122][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4489.787122][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4489.787122][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [4489.787122][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4489.787122][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4489.787122][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4489.787122][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [ 4489.787122][T21696]
[ 4489.789156][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4489.789156][T21696] ipv6_add_dev (net/ipv6/addrconf.c:344 net/ipv6/addrconf.c:409) 
[4489.789156][T21696] addrconf_notify (net/ipv6/addrconf.c:3656) 
[4489.789156][T21696] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[4489.789156][T21696] register_netdevice (./include/linux/notifier.h:207 net/core/dev.c:10499) 
[4489.789156][T21696] veth_newlink (drivers/net/veth.c:1861) 
[4489.789156][T21696] rtnl_newlink_create (net/core/rtnetlink.c:3510) 
[4489.789156][T21696] __rtnl_newlink (net/core/rtnetlink.c:3730) 
[4489.789156][T21696] rtnl_newlink (net/core/rtnetlink.c:3744) 
[4489.789156][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4489.789156][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4489.789156][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4489.789156][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4489.789156][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4489.789156][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4489.789156][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4489.789156][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4489.789156][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4489.789156][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4489.789156][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [ 4489.789156][T21696]
| [ 4500.021446][T21696] unregister_netdevice: waiting for veth_A-R1 to become free. Usage count = 5
[ 4500.021825][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4500.021825][T21696] dst_init (net/core/dst.c:53) 
[4500.021825][T21696] dst_alloc (net/core/dst.c:96) 
[4500.021825][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4500.021825][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4500.021825][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4500.021825][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4500.021825][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4500.021825][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4500.021825][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4500.021825][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4500.021825][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4500.021825][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4500.021825][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4500.021825][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4500.021825][T21696] arp_solicit (net/ipv4/arp.c:392) 
[4500.021825][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [4500.021825][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4500.021825][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4500.021825][T21696] arp_solicit (net/ipv4/arp.c:392) 
| [4500.021825][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [ 4500.021825][T21696]
[ 4500.024124][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4500.024124][T21696] dst_init (net/core/dst.c:53) 
[4500.024124][T21696] dst_alloc (net/core/dst.c:96) 
[4500.024124][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4500.024124][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4500.024124][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4500.024124][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4500.024124][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4500.024124][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4500.024124][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4500.024124][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4500.024124][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4500.024124][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4500.024124][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4500.024124][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4500.024124][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
[4500.024124][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [4500.024124][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4500.024124][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4500.024124][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
| [4500.024124][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [ 4500.024124][T21696]
[ 4500.026381][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4500.026381][T21696] netdev_get_by_index (net/core/dev.c:917) 
[4500.026381][T21696] fib6_nh_init (net/ipv6/route.c:3543) 
[4500.026381][T21696] nh_create_ipv6 (net/ipv4/nexthop.c:2841) 
[4500.026381][T21696] nexthop_create (net/ipv4/nexthop.c:2892) 
[4500.026381][T21696] rtm_new_nexthop (net/ipv4/nexthop.c:2934 net/ipv4/nexthop.c:3220) 
[4500.026381][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4500.026381][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4500.026381][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4500.026381][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4500.026381][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4500.026381][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4500.026381][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4500.026381][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4500.026381][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [4500.026381][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4500.026381][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4500.026381][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4500.026381][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [ 4500.026381][T21696]
[ 4500.028366][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4500.028366][T21696] ipv6_add_dev (net/ipv6/addrconf.c:344 net/ipv6/addrconf.c:409) 
[4500.028366][T21696] addrconf_notify (net/ipv6/addrconf.c:3656) 
[4500.028366][T21696] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[4500.028366][T21696] register_netdevice (./include/linux/notifier.h:207 net/core/dev.c:10499) 
[4500.028366][T21696] veth_newlink (drivers/net/veth.c:1861) 
[4500.028366][T21696] rtnl_newlink_create (net/core/rtnetlink.c:3510) 
[4500.028366][T21696] __rtnl_newlink (net/core/rtnetlink.c:3730) 
[4500.028366][T21696] rtnl_newlink (net/core/rtnetlink.c:3744) 
[4500.028366][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4500.028366][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4500.028366][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4500.028366][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4500.028366][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4500.028366][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4500.028366][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4500.028366][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4500.028366][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4500.028366][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4500.028366][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [ 4500.028366][T21696]
| [ 4510.157483][T21696] unregister_netdevice: waiting for veth_A-R1 to become free. Usage count = 5
[ 4510.157865][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4510.157865][T21696] dst_init (net/core/dst.c:53) 
[4510.157865][T21696] dst_alloc (net/core/dst.c:96) 
[4510.157865][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4510.157865][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4510.157865][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4510.157865][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4510.157865][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4510.157865][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4510.157865][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4510.157865][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4510.157865][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4510.157865][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4510.157865][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4510.157865][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4510.157865][T21696] arp_solicit (net/ipv4/arp.c:392) 
[4510.157865][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [4510.157865][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4510.157865][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4510.157865][T21696] arp_solicit (net/ipv4/arp.c:392) 
| [4510.157865][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [ 4510.157865][T21696]
[ 4510.160128][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4510.160128][T21696] dst_init (net/core/dst.c:53) 
[4510.160128][T21696] dst_alloc (net/core/dst.c:96) 
[4510.160128][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4510.160128][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4510.160128][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4510.160128][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4510.160128][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4510.160128][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4510.160128][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4510.160128][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4510.160128][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4510.160128][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4510.160128][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4510.160128][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4510.160128][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
[4510.160128][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [4510.160128][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4510.160128][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4510.160128][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
| [4510.160128][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [ 4510.160128][T21696]
[ 4510.162394][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4510.162394][T21696] netdev_get_by_index (net/core/dev.c:917) 
[4510.162394][T21696] fib6_nh_init (net/ipv6/route.c:3543) 
[4510.162394][T21696] nh_create_ipv6 (net/ipv4/nexthop.c:2841) 
[4510.162394][T21696] nexthop_create (net/ipv4/nexthop.c:2892) 
[4510.162394][T21696] rtm_new_nexthop (net/ipv4/nexthop.c:2934 net/ipv4/nexthop.c:3220) 
[4510.162394][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4510.162394][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4510.162394][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4510.162394][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4510.162394][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4510.162394][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4510.162394][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4510.162394][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4510.162394][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [4510.162394][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4510.162394][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4510.162394][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4510.162394][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [ 4510.162394][T21696]
[ 4510.164359][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4510.164359][T21696] ipv6_add_dev (net/ipv6/addrconf.c:344 net/ipv6/addrconf.c:409) 
[4510.164359][T21696] addrconf_notify (net/ipv6/addrconf.c:3656) 
[4510.164359][T21696] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[4510.164359][T21696] register_netdevice (./include/linux/notifier.h:207 net/core/dev.c:10499) 
[4510.164359][T21696] veth_newlink (drivers/net/veth.c:1861) 
[4510.164359][T21696] rtnl_newlink_create (net/core/rtnetlink.c:3510) 
[4510.164359][T21696] __rtnl_newlink (net/core/rtnetlink.c:3730) 
[4510.164359][T21696] rtnl_newlink (net/core/rtnetlink.c:3744) 
[4510.164359][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4510.164359][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4510.164359][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4510.164359][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4510.164359][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4510.164359][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4510.164359][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4510.164359][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4510.164359][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4510.164359][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4510.164359][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [ 4510.164359][T21696]
| [ 4520.261518][T21696] unregister_netdevice: waiting for veth_A-R1 to become free. Usage count = 5
[ 4520.261907][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4520.261907][T21696] dst_init (net/core/dst.c:53) 
[4520.261907][T21696] dst_alloc (net/core/dst.c:96) 
[4520.261907][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4520.261907][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4520.261907][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4520.261907][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4520.261907][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4520.261907][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4520.261907][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4520.261907][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4520.261907][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4520.261907][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4520.261907][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4520.261907][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4520.261907][T21696] arp_solicit (net/ipv4/arp.c:392) 
[4520.261907][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [4520.261907][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4520.261907][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4520.261907][T21696] arp_solicit (net/ipv4/arp.c:392) 
| [4520.261907][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [ 4520.261907][T21696]
[ 4520.264177][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4520.264177][T21696] dst_init (net/core/dst.c:53) 
[4520.264177][T21696] dst_alloc (net/core/dst.c:96) 
[4520.264177][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4520.264177][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4520.264177][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4520.264177][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4520.264177][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4520.264177][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4520.264177][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4520.264177][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4520.264177][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4520.264177][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4520.264177][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4520.264177][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4520.264177][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
[4520.264177][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [4520.264177][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4520.264177][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4520.264177][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
| [4520.264177][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [ 4520.264177][T21696]
[ 4520.266497][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4520.266497][T21696] netdev_get_by_index (net/core/dev.c:917) 
[4520.266497][T21696] fib6_nh_init (net/ipv6/route.c:3543) 
[4520.266497][T21696] nh_create_ipv6 (net/ipv4/nexthop.c:2841) 
[4520.266497][T21696] nexthop_create (net/ipv4/nexthop.c:2892) 
[4520.266497][T21696] rtm_new_nexthop (net/ipv4/nexthop.c:2934 net/ipv4/nexthop.c:3220) 
[4520.266497][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4520.266497][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4520.266497][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4520.266497][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4520.266497][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4520.266497][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4520.266497][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4520.266497][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4520.266497][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [4520.266497][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4520.266497][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4520.266497][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4520.266497][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [ 4520.266497][T21696]
[ 4520.268530][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4520.268530][T21696] ipv6_add_dev (net/ipv6/addrconf.c:344 net/ipv6/addrconf.c:409) 
[4520.268530][T21696] addrconf_notify (net/ipv6/addrconf.c:3656) 
[4520.268530][T21696] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[4520.268530][T21696] register_netdevice (./include/linux/notifier.h:207 net/core/dev.c:10499) 
[4520.268530][T21696] veth_newlink (drivers/net/veth.c:1861) 
[4520.268530][T21696] rtnl_newlink_create (net/core/rtnetlink.c:3510) 
[4520.268530][T21696] __rtnl_newlink (net/core/rtnetlink.c:3730) 
[4520.268530][T21696] rtnl_newlink (net/core/rtnetlink.c:3744) 
[4520.268530][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4520.268530][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4520.268530][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4520.268530][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4520.268530][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4520.268530][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4520.268530][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4520.268530][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4520.268530][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4520.268530][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4520.268530][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [ 4520.268530][T21696]
| [ 4530.461493][T21696] unregister_netdevice: waiting for veth_A-R1 to become free. Usage count = 5
[ 4530.462147][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4530.462147][T21696] dst_init (net/core/dst.c:53) 
[4530.462147][T21696] dst_alloc (net/core/dst.c:96) 
[4530.462147][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4530.462147][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4530.462147][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4530.462147][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4530.462147][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4530.462147][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4530.462147][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4530.462147][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4530.462147][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4530.462147][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4530.462147][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4530.462147][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4530.462147][T21696] arp_solicit (net/ipv4/arp.c:392) 
[4530.462147][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [4530.462147][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4530.462147][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4530.462147][T21696] arp_solicit (net/ipv4/arp.c:392) 
| [4530.462147][T21696] neigh_probe (net/core/neighbour.c:1077) 
| [ 4530.462147][T21696]
[ 4530.464737][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4530.464737][T21696] dst_init (net/core/dst.c:53) 
[4530.464737][T21696] dst_alloc (net/core/dst.c:96) 
[4530.464737][T21696] ip6_dst_alloc (net/ipv6/route.c:342) 
[4530.464737][T21696] ip6_rt_pcpu_alloc (net/ipv6/route.c:1381) 
[4530.464737][T21696] ip6_pol_route (net/ipv6/route.c:1430 net/ipv6/route.c:2267) 
[4530.464737][T21696] fib6_rule_lookup (./include/net/ip6_fib.h:616 net/ipv6/fib6_rules.c:121) 
[4530.464737][T21696] ip6_route_output_flags (net/ipv6/route.c:2639 net/ipv6/route.c:2651) 
[4530.464737][T21696] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1156) 
[4530.464737][T21696] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260) 
[4530.464737][T21696] udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:165 net/ipv6/ip6_udp_tunnel.c:135) 
[4530.464737][T21696] vxlan_xmit_one (drivers/net/vxlan/vxlan_core.c:2530 (discriminator 4)) vxlan
[4530.464737][T21696] vxlan_xmit (drivers/net/vxlan/vxlan_core.c:2795) vxlan
[4530.464737][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
[4530.464737][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
[4530.464737][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
[4530.464737][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [4530.464737][T21696] dev_hard_start_xmit (./include/linux/netdevice.h:4889 ./include/linux/netdevice.h:4898 net/core/dev.c:3581 net/core/dev.c:3597) 
| [4530.464737][T21696] __dev_queue_xmit (net/core/dev.h:168 net/core/dev.c:4425) 
| [4530.464737][T21696] ip6_finish_output2 (./include/net/neighbour.h:540 net/ipv6/ip6_output.c:141) 
| [4530.464737][T21696] ip6_finish_output (net/ipv6/ip6_output.c:215 net/ipv6/ip6_output.c:226) 
| [ 4530.464737][T21696]
[ 4530.467503][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4530.467503][T21696] netdev_get_by_index (net/core/dev.c:917) 
[4530.467503][T21696] fib6_nh_init (net/ipv6/route.c:3543) 
[4530.467503][T21696] nh_create_ipv6 (net/ipv4/nexthop.c:2841) 
[4530.467503][T21696] nexthop_create (net/ipv4/nexthop.c:2892) 
[4530.467503][T21696] rtm_new_nexthop (net/ipv4/nexthop.c:2934 net/ipv4/nexthop.c:3220) 
[4530.467503][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4530.467503][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4530.467503][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4530.467503][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4530.467503][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4530.467503][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4530.467503][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[4530.467503][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4530.467503][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [4530.467503][T21696] ___sys_sendmsg (net/socket.c:2653) 
| [4530.467503][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
| [4530.467503][T21696] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
| [4530.467503][T21696] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
| [ 4530.467503][T21696]
[ 4530.469862][T21696] ref_tracker: veth_A-R1@ffff88800b4e15e0 has 1/4 users at
[4530.469862][T21696] ipv6_add_dev (net/ipv6/addrconf.c:344 net/ipv6/addrconf.c:409) 
[4530.469862][T21696] addrconf_notify (net/ipv6/addrconf.c:3656) 
[4530.469862][T21696] notifier_call_chain (kernel/notifier.c:93 (discriminator 2)) 
[4530.469862][T21696] register_netdevice (./include/linux/notifier.h:207 net/core/dev.c:10499) 
[4530.469862][T21696] veth_newlink (drivers/net/veth.c:1861) 
[4530.469862][T21696] rtnl_newlink_create (net/core/rtnetlink.c:3510) 
[4530.469862][T21696] __rtnl_newlink (net/core/rtnetlink.c:3730) 
[4530.469862][T21696] rtnl_newlink (net/core/rtnetlink.c:3744) 
[4530.469862][T21696] rtnetlink_rcv_msg (net/core/rtnetlink.c:6646) 
[4530.469862][T21696] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[4530.469862][T21696] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4530.469862][T21696] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4530.469862][T21696] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[4530.469862][T21696] ___sys_sendmsg (net/socket.c:2653) 
[4530.469862][T21696] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 


Finger prints:
dev_hard_start_xmit:__dev_queue_xmit:arp_solicit:neigh_probe:dst_init
dst_init:dst_alloc:ip6_dst_alloc:ip6_rt_pcpu_alloc:ip6_pol_route
dev_hard_start_xmit:__dev_queue_xmit:ip6_finish_output2:ip6_finish_output:netdev_get_by_index
___sys_sendmsg:__sys_sendmsg:do_syscall_64:ipv6_add_dev:addrconf_notify
___sys_sendmsg:__sys_sendmsg:do_syscall_64:dst_init:dst_alloc