unregister_netdevice: waiting for syz_tun to become free. Usage count = 10
ref_tracker: syz_tun@00000000a65a9b99 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline]
     netdev_hold include/linux/netdevice.h:4076 [inline]
     dst_init+0xbc/0x3ec net/core/dst.c:52
     dst_alloc+0x118/0x168 net/core/dst.c:93
     rt_dst_alloc net/ipv4/route.c:1612 [inline]
     __mkroute_output net/ipv4/route.c:2573 [inline]
     ip_route_output_key_hash_rcu+0x116c/0x1e88 net/ipv4/route.c:2795
     ip_route_output_key_hash+0x174/0x294 net/ipv4/route.c:2624
     __ip_route_output_key include/net/route.h:140 [inline]
     ip_route_output_flow+0x3c/0x160 net/ipv4/route.c:2852
     ip_route_output_key include/net/route.h:150 [inline]
     geneve_link_config+0x174/0x550 drivers/net/geneve.c:1585
     geneve_newlink+0x134/0x1a8 drivers/net/geneve.c:1638
     rtnl_newlink_create net/core/rtnetlink.c:3510 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3730 [inline]
     rtnl_newlink+0x1188/0x1bd0 net/core/rtnetlink.c:3743
     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

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 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
     ip6_route_add+0x38/0x194 net/ipv6/route.c:3853
     addrconf_prefix_route net/ipv6/addrconf.c:2486 [inline]
     addrconf_add_linklocal+0x4cc/0x8b4 net/ipv6/addrconf.c:3317
     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
     netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2550

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 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

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 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
     ip6_route_add+0x38/0x194 net/ipv6/route.c:3853
     addrconf_add_mroute net/ipv6/addrconf.c:2550 [inline]
     addrconf_add_dev+0x2b8/0x458 net/ipv6/addrconf.c:2568
     addrconf_dev_config net/ipv6/addrconf.c:3482 [inline]
     addrconf_init_auto_addrs+0x70c/0xca0 net/ipv6/addrconf.c:3570
     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
     netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2550
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6665

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 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
     ip6_route_add+0x38/0x194 net/ipv6/route.c:3853
     addrconf_prefix_route net/ipv6/addrconf.c:2486 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3601 [inline]
     addrconf_permanent_addr+0x670/0xaf0 net/ipv6/addrconf.c:3625
     addrconf_notify+0x7bc/0xce8 net/ipv6/addrconf.c:3697
     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
     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

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 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
     fixup_permanent_addr net/ipv6/addrconf.c:3586 [inline]
     addrconf_permanent_addr+0x244/0xaf0 net/ipv6/addrconf.c:3625
     addrconf_notify+0x7bc/0xce8 net/ipv6/addrconf.c:3697
     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
     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

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline]
     netdev_hold include/linux/netdevice.h:4076 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
     fib_check_nh+0xa84/0x17a4 net/ipv4/fib_semantics.c:1259
     fib_create_info+0x105c/0x1e04 net/ipv4/fib_semantics.c:1557
     fib_table_insert+0x1a4/0x1574 net/ipv4/fib_trie.c:1237
     fib_magic+0x300/0x4b8 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x33c/0x4ec net/ipv4/fib_frontend.c:1148
     fib_netdev_event+0x368/0x4ac net/ipv4/fib_frontend.c:1486
     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
     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

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4047 [inline]
     netdev_hold include/linux/netdevice.h:4076 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
     fib_check_nh+0xa84/0x17a4 net/ipv4/fib_semantics.c:1259
     fib_create_info+0x105c/0x1e04 net/ipv4/fib_semantics.c:1557
     fib_table_insert+0x1a4/0x1574 net/ipv4/fib_trie.c:1237
     fib_magic+0x300/0x4b8 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x2e4/0x4ec net/ipv4/fib_frontend.c:1141
     fib_netdev_event+0x368/0x4ac net/ipv4/fib_frontend.c:1486
     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
     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

ref_tracker: syz_tun@00000000a65a9b99 has 1/9 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