unregister_netdevice: waiting for netdevsim2 to become free. Usage count = 4
ref_tracker: eth%d@0000000074b50722 has 1/3 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4059 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:914
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3543
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3809
     addrconf_f6i_alloc+0x2c4/0x5d0 net/ipv6/route.c:4588
     ipv6_add_addr+0x4b4/0xde8 net/ipv6/addrconf.c:1120
     inet6_addr_add+0x460/0x914 net/ipv6/addrconf.c:3060
     inet6_rtm_newaddr+0x68c/0xa4c net/ipv6/addrconf.c:5048
     rtnetlink_rcv_msg+0x630/0xa9c net/core/rtnetlink.c:6647
     netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2550
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6665
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1357
     netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1901
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x374/0x4f4 net/socket.c:2204
     __do_sys_sendto net/socket.c:2216 [inline]
     __se_sys_sendto net/socket.c:2212 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2212
     __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
     invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
     el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132

ref_tracker: eth%d@0000000074b50722 has 1/3 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline]
     netdev_tracker_alloc+0x68/0xb4 include/linux/netdevice.h:4059
     fib_create_info+0x1214/0x1e04 net/ipv4/fib_semantics.c:1551
     fib_table_insert+0x1a4/0x1574 net/ipv4/fib_trie.c:1237
     fib_magic+0x300/0x4b8 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x118/0x4ec net/ipv4/fib_frontend.c:1126
     fib_inetaddr_event+0x12c/0x200 net/ipv4/fib_frontend.c:1440
     notifier_call_chain+0x1b4/0x538 kernel/notifier.c:93
     blocking_notifier_call_chain+0x70/0xa0 kernel/notifier.c:388
     __inet_insert_ifa+0x8b0/0xac8 net/ipv4/devinet.c:561
     inet_rtm_newaddr+0xf90/0x18e4 net/ipv4/devinet.c:986
     rtnetlink_rcv_msg+0x630/0xa9c net/core/rtnetlink.c:6647
     netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2550
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6665
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1357
     netlink_sendmsg+0x7a4/0xa8c net/netlink/af_netlink.c:1901
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x374/0x4f4 net/socket.c:2204

ref_tracker: eth%d@0000000074b50722 has 1/3 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4059 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:914
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3543
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3809
     addrconf_f6i_alloc+0x2c4/0x5d0 net/ipv6/route.c:4588
     ipv6_add_addr+0x4b4/0xde8 net/ipv6/addrconf.c:1120
     addrconf_add_linklocal+0x2c4/0x8b4 net/ipv6/addrconf.c:3315
     addrconf_addr_gen+0x3d4/0x8f4 net/ipv6/addrconf.c:3446
     addrconf_init_auto_addrs+0x798/0xca0
     addrconf_notify+0x8d0/0xce8 net/ipv6/addrconf.c:3743
     notifier_call_chain+0x1b4/0x538 kernel/notifier.c:93
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:8915
     do_setlink+0xadc/0x3778 net/core/rtnetlink.c:2900
     __rtnl_newlink net/core/rtnetlink.c:3696 [inline]
     rtnl_newlink+0x14c4/0x1bd0 net/core/rtnetlink.c:3743
     rtnetlink_rcv_msg+0x630/0xa9c net/core/rtnetlink.c:6647

netdevsim netdevsim2 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim2 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
bridge_slave_1: left allmulticast mode
bridge_slave_1: left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
bridge_slave_0: left allmulticast mode
bridge_slave_0: left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state