unregister_netdevice: waiting for syz_tun to become free. Usage count = 10
ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     dst_init+0xda/0x580 net/core/dst.c:52
     dst_alloc+0xbb/0x1a0 net/core/dst.c:93
     rt_dst_alloc+0x35/0x3a0 net/ipv4/route.c:1651
     __mkroute_output net/ipv4/route.c:2655 [inline]
     ip_route_output_key_hash_rcu+0x87a/0x28e0 net/ipv4/route.c:2875
     ip_route_output_key_hash+0x10f/0x2b0 net/ipv4/route.c:2705
     __ip_route_output_key include/net/route.h:169 [inline]
     ip_route_output_flow+0x27/0x150 net/ipv4/route.c:2932
     ip_route_output_key include/net/route.h:179 [inline]
     geneve_link_config.part.0+0x242/0x5a0 drivers/net/geneve.c:1622
     geneve_link_config include/net/rtnetlink.h:95 [inline]
     geneve_newlink+0x346/0x3b0 drivers/net/geneve.c:1680
     rtnl_newlink_create net/core/rtnetlink.c:3833 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3950 [inline]
     rtnl_newlink+0xc45/0x2000 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951
     netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg net/socket.c:742 [inline]
     __sys_sendto+0x4a3/0x520 net/socket.c:2244
     __do_sys_sendto net/socket.c:2251 [inline]
     __se_sys_sendto net/socket.c:2247 [inline]
     __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2247
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x7c/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x791/0x1fb0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x507/0xfa0 net/ipv6/route.c:3890
     ip6_route_add.part.0+0x56/0x1d0 net/ipv6/route.c:3942
     ip6_route_add+0x45/0x60 net/ipv6/route.c:3935
     addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2488
     addrconf_add_linklocal+0x329/0x500 net/ipv6/addrconf.c:3313
     addrconf_addr_gen+0x364/0x3b0 net/ipv6/addrconf.c:3442
     addrconf_dev_config net/ipv6/addrconf.c:3489 [inline]
     addrconf_init_auto_addrs+0x2ba/0x810 net/ipv6/addrconf.c:3567
     addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3740
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9676
     netif_change_flags+0x108/0x160 net/core/dev.c:9705
     do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4065

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x7c/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x791/0x1fb0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x507/0xfa0 net/ipv6/route.c:3890
     addrconf_f6i_alloc+0x313/0x660 net/ipv6/route.c:4682
     ipv6_add_addr+0x531/0x1fe0 net/ipv6/addrconf.c:1126
     addrconf_add_linklocal+0x2a5/0x500 net/ipv6/addrconf.c:3311
     addrconf_addr_gen+0x364/0x3b0 net/ipv6/addrconf.c:3442
     addrconf_dev_config net/ipv6/addrconf.c:3489 [inline]
     addrconf_init_auto_addrs+0x2ba/0x810 net/ipv6/addrconf.c:3567
     addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3740
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9676
     netif_change_flags+0x108/0x160 net/core/dev.c:9705
     do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x7c/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x791/0x1fb0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x507/0xfa0 net/ipv6/route.c:3890
     ip6_route_add.part.0+0x56/0x1d0 net/ipv6/route.c:3942
     ip6_route_add+0x45/0x60 net/ipv6/route.c:3935
     addrconf_add_mroute+0x1dd/0x350 net/ipv6/addrconf.c:2552
     addrconf_add_dev+0x14e/0x1c0 net/ipv6/addrconf.c:2570
     addrconf_dev_config net/ipv6/addrconf.c:3479 [inline]
     addrconf_init_auto_addrs+0x201/0x810 net/ipv6/addrconf.c:3567
     addrconf_notify+0xe93/0x19e0 net/ipv6/addrconf.c:3740
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9676
     netif_change_flags+0x108/0x160 net/core/dev.c:9705
     do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x7c/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x791/0x1fb0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x507/0xfa0 net/ipv6/route.c:3890
     ip6_route_add.part.0+0x56/0x1d0 net/ipv6/route.c:3942
     ip6_route_add+0x45/0x60 net/ipv6/route.c:3935
     addrconf_prefix_route+0x2fd/0x510 net/ipv6/addrconf.c:2488
     fixup_permanent_addr net/ipv6/addrconf.c:3598 [inline]
     addrconf_permanent_addr net/ipv6/addrconf.c:3622 [inline]
     addrconf_notify+0x12c6/0x19e0 net/ipv6/addrconf.c:3694
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9676
     netif_change_flags+0x108/0x160 net/core/dev.c:9705
     do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951
     netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     netdev_hold include/linux/netdevice.h:4399 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1263 [inline]
     fib_check_nh+0x271/0x620 net/ipv4/fib_semantics.c:1283
     fib_create_info+0x21e3/0x46b0 net/ipv4/fib_semantics.c:1503
     fib_table_insert+0x177/0x1c40 net/ipv4/fib_trie.c:1212
     fib_magic+0x4d4/0x5c0 net/ipv4/fib_frontend.c:1134
     fib_add_ifaddr+0x4d2/0x580 net/ipv4/fib_frontend.c:1178
     fib_netdev_event+0x38a/0x710 net/ipv4/fib_frontend.c:1516
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9676
     netif_change_flags+0x108/0x160 net/core/dev.c:9705
     do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951
     netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_hold include/linux/netdevice.h:4404 [inline]
     netdev_hold include/linux/netdevice.h:4399 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1263 [inline]
     fib_check_nh+0x271/0x620 net/ipv4/fib_semantics.c:1283
     fib_create_info+0x21e3/0x46b0 net/ipv4/fib_semantics.c:1503
     fib_table_insert+0x177/0x1c40 net/ipv4/fib_trie.c:1212
     fib_magic+0x4d4/0x5c0 net/ipv4/fib_frontend.c:1134
     fib_add_ifaddr+0x3a1/0x580 net/ipv4/fib_frontend.c:1171
     fib_netdev_event+0x38a/0x710 net/ipv4/fib_frontend.c:1516
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x12c/0x2e0 net/core/dev.c:9676
     netif_change_flags+0x108/0x160 net/core/dev.c:9705
     do_setlink.constprop.0+0xb53/0x4380 net/core/rtnetlink.c:3151
     rtnl_changelink net/core/rtnetlink.c:3769 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3928 [inline]
     rtnl_newlink+0x1446/0x2000 net/core/rtnetlink.c:4065
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951
     netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     netdev_get_by_index+0x7c/0xb0 net/core/dev.c:1008
     fib6_nh_init+0x791/0x1fb0 net/ipv6/route.c:3590
     ip6_route_info_create_nh+0x507/0xfa0 net/ipv6/route.c:3890
     addrconf_f6i_alloc+0x313/0x660 net/ipv6/route.c:4682
     ipv6_add_addr+0x531/0x1fe0 net/ipv6/addrconf.c:1126
     inet6_addr_add+0x256/0x960 net/ipv6/addrconf.c:3050
     inet6_rtm_newaddr+0x1619/0x1c70 net/ipv6/addrconf.c:5059
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951
     netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg net/socket.c:742 [inline]
     __sys_sendto+0x4a3/0x520 net/socket.c:2244
     __do_sys_sendto net/socket.c:2251 [inline]
     __se_sys_sendto net/socket.c:2247 [inline]
     __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2247
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
     entry_SYSCALL_64_after_hwframe+0x77/0x7f

ref_tracker: netdev@ffff888053b90618 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4375 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4387 [inline]
     fib_create_info+0x2b79/0x46b0 net/ipv4/fib_semantics.c:1497
     fib_table_insert+0x177/0x1c40 net/ipv4/fib_trie.c:1212
     fib_magic+0x4d4/0x5c0 net/ipv4/fib_frontend.c:1134
     fib_add_ifaddr+0x16d/0x580 net/ipv4/fib_frontend.c:1156
     fib_inetaddr_event+0x147/0x270 net/ipv4/fib_frontend.c:1470
     notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
     blocking_notifier_call_chain kernel/notifier.c:380 [inline]
     blocking_notifier_call_chain+0x69/0xa0 kernel/notifier.c:368
     __inet_insert_ifa+0x925/0xcd0 net/ipv4/devinet.c:566
     inet_rtm_newaddr+0xd87/0x1540 net/ipv4/devinet.c:1001
     rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6951
     netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:727 [inline]
     __sock_sendmsg net/socket.c:742 [inline]
     __sys_sendto+0x4a3/0x520 net/socket.c:2244
     __do_sys_sendto net/socket.c:2251 [inline]
     __se_sys_sendto net/socket.c:2247 [inline]
     __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2247
     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
     do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94