unregister_netdevice: waiting for syz_tun to become free. Usage count = 11
ref_tracker: netdev@ffff8880675d4610 has 2/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     dst_init+0xd9/0x450 net/core/dst.c:52
     dst_alloc+0x12a/0x170 net/core/dst.c:93
     rt_dst_alloc net/ipv4/route.c:1646 [inline]
     __mkroute_output net/ipv4/route.c:2650 [inline]
     ip_route_output_key_hash_rcu+0x1560/0x23e0 net/ipv4/route.c:2870
     ip_route_output_key_hash+0x174/0x280 net/ipv4/route.c:2700
     __ip_route_output_key include/net/route.h:169 [inline]
     ip_route_connect include/net/route.h:348 [inline]
     __ip4_datagram_connect+0x8f4/0x1270 net/ipv4/datagram.c:49
     udp_connect+0x33/0x1f0 net/ipv4/udp.c:2182
     __sys_connect_file net/socket.c:2102 [inline]
     __sys_connect+0x313/0x440 net/socket.c:2121
     __do_sys_connect net/socket.c:2127 [inline]
     __se_sys_connect net/socket.c:2124 [inline]
     __x64_sys_connect+0x7a/0x90 net/socket.c:2124
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x79/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x1cd/0x1ff0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x16a/0xab0 net/ipv6/route.c:3890
     ip6_route_add+0x6e/0x1b0 net/ipv6/route.c:3942
     addrconf_prefix_route net/ipv6/addrconf.c:2488 [inline]
     addrconf_add_linklocal+0x45f/0x6c0 net/ipv6/addrconf.c:3313
     addrconf_addr_gen+0x490/0x580 net/ipv6/addrconf.c:3442
     addrconf_init_auto_addrs+0x62d/0xa30 net/ipv6/addrconf.c:-1
     addrconf_notify+0xacc/0x1010 net/ipv6/addrconf.c:3740
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
     netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705
     do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x79/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x1cd/0x1ff0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x16a/0xab0 net/ipv6/route.c:3890
     addrconf_f6i_alloc+0x203/0x450 net/ipv6/route.c:4682
     ipv6_add_addr+0x56e/0x1090 net/ipv6/addrconf.c:1126
     addrconf_add_linklocal+0x28c/0x6c0 net/ipv6/addrconf.c:3311
     addrconf_addr_gen+0x490/0x580 net/ipv6/addrconf.c:3442
     addrconf_init_auto_addrs+0x62d/0xa30 net/ipv6/addrconf.c:-1
     addrconf_notify+0xacc/0x1010 net/ipv6/addrconf.c:3740
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
     netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705
     do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x79/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x1cd/0x1ff0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x16a/0xab0 net/ipv6/route.c:3890
     ip6_route_add+0x6e/0x1b0 net/ipv6/route.c:3942
     addrconf_add_mroute net/ipv6/addrconf.c:2552 [inline]
     addrconf_add_dev+0x24f/0x340 net/ipv6/addrconf.c:2570
     addrconf_dev_config net/ipv6/addrconf.c:3479 [inline]
     addrconf_init_auto_addrs+0x57c/0xa30 net/ipv6/addrconf.c:3567
     addrconf_notify+0xacc/0x1010 net/ipv6/addrconf.c:3740
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
     netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705
     do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x79/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x1cd/0x1ff0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x16a/0xab0 net/ipv6/route.c:3890
     ip6_route_add+0x6e/0x1b0 net/ipv6/route.c:3942
     addrconf_prefix_route net/ipv6/addrconf.c:2488 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3598 [inline]
     addrconf_permanent_addr+0x67f/0x9d0 net/ipv6/addrconf.c:3622
     addrconf_notify+0x887/0x1010 net/ipv6/addrconf.c:3694
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
     netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705
     do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg+0x21c/0x270 net/socket.c:742

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1263 [inline]
     fib_check_nh+0xc46/0x1910 net/ipv4/fib_semantics.c:1283
     fib_create_info+0x20a2/0x3210 net/ipv4/fib_semantics.c:1503
     fib_table_insert+0xc6/0x1b50 net/ipv4/fib_trie.c:1212
     fib_magic+0x2c4/0x390 net/ipv4/fib_frontend.c:1134
     fib_add_ifaddr+0x3fb/0x5f0 net/ipv4/fib_frontend.c:1178
     fib_netdev_event+0x382/0x490 net/ipv4/fib_frontend.c:1516
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
     netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705
     do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg+0x21c/0x270 net/socket.c:742

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1263 [inline]
     fib_check_nh+0xc46/0x1910 net/ipv4/fib_semantics.c:1283
     fib_create_info+0x20a2/0x3210 net/ipv4/fib_semantics.c:1503
     fib_table_insert+0xc6/0x1b50 net/ipv4/fib_trie.c:1212
     fib_magic+0x2c4/0x390 net/ipv4/fib_frontend.c:1134
     fib_add_ifaddr+0x38d/0x5f0 net/ipv4/fib_frontend.c:1171
     fib_netdev_event+0x382/0x490 net/ipv4/fib_frontend.c:1516
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1
     netif_change_flags+0xe8/0x1a0 net/core/dev.c:9705
     do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1619/0x1c80 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg+0x21c/0x270 net/socket.c:742

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x79/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x1cd/0x1ff0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x16a/0xab0 net/ipv6/route.c:3890
     addrconf_f6i_alloc+0x203/0x450 net/ipv6/route.c:4682
     ipv6_add_addr+0x56e/0x1090 net/ipv6/addrconf.c:1126
     inet6_addr_add+0x387/0xc00 net/ipv6/addrconf.c:3050
     inet6_rtm_newaddr+0x93d/0xd20 net/ipv6/addrconf.c:5059
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg+0x21c/0x270 net/socket.c:742
     __sys_sendto+0x3bd/0x520 net/socket.c:2244
     __do_sys_sendto net/socket.c:2251 [inline]
     __se_sys_sendto net/socket.c:2247 [inline]
     __x64_sys_sendto+0xde/0x100 net/socket.c:2247
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

ref_tracker: netdev@ffff8880675d4610 has 1/10 users at
     fib_create_info+0x22f6/0x3210 net/ipv4/fib_semantics.c:1497
     fib_table_insert+0xc6/0x1b50 net/ipv4/fib_trie.c:1212
     fib_magic+0x2c4/0x390 net/ipv4/fib_frontend.c:1134
     fib_add_ifaddr+0x144/0x5f0 net/ipv4/fib_frontend.c:1156
     fib_inetaddr_event+0x12e/0x190 net/ipv4/fib_frontend.c:1470
     notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
     blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:380
     __inet_insert_ifa+0xa13/0xbf0 net/ipv4/devinet.c:566
     inet_rtm_newaddr+0xf3a/0x18b0 net/ipv4/devinet.c:1001
     rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6954
     netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg+0x21c/0x270 net/socket.c:742
     __sys_sendto+0x3bd/0x520 net/socket.c:2244
     __do_sys_sendto net/socket.c:2251 [inline]
     __se_sys_sendto net/socket.c:2247 [inline]
     __x64_sys_sendto+0xde/0x100 net/socket.c:2247