unregister_netdevice: waiting for syz_tun to become free. Usage count = 10
ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_hold include/linux/netdevice.h:4139 [inline]
     dst_init+0xd9/0x460 net/core/dst.c:52
     dst_alloc+0x12e/0x170 net/core/dst.c:93
     rt_dst_alloc net/ipv4/route.c:1662 [inline]
     __mkroute_output net/ipv4/route.c:2626 [inline]
     ip_route_output_key_hash_rcu+0x14f0/0x2360 net/ipv4/route.c:2848
     ip_route_output_key_hash+0x1f3/0x330 net/ipv4/route.c:2677
     __ip_route_output_key include/net/route.h:134 [inline]
     ip_route_output_flow+0x2a/0x150 net/ipv4/route.c:2905
     ip_route_output_key include/net/route.h:150 [inline]
     geneve_link_config+0x1a6/0x670 drivers/net/geneve.c:1646
     geneve_newlink+0x151/0x1c0 drivers/net/geneve.c:1699
     rtnl_newlink_create net/core/rtnetlink.c:3517 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3737 [inline]
     rtnl_newlink+0x1542/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x4a9/0x6b0 net/socket.c:2200
     __do_sys_sendto net/socket.c:2212 [inline]
     __se_sys_sendto net/socket.c:2208 [inline]
     __x64_sys_sendto+0xde/0xf0 net/socket.c:2208
     do_syscall_x64 arch/x86/entry/common.c:46 [inline]
     do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
     entry_SYSCALL_64_after_hwframe+0x68/0xd2

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4122 [inline]
     netdev_get_by_index+0x79/0xa0 net/core/dev.c:911
     fib6_nh_init+0x1f8/0x2060 net/ipv6/route.c:3584
     ip6_route_info_create+0x94d/0x1240 net/ipv6/route.c:3855
     ip6_route_add+0x28/0x160 net/ipv6/route.c:3899
     addrconf_prefix_route net/ipv6/addrconf.c:2458 [inline]
     addrconf_add_linklocal+0x44d/0x6d0 net/ipv6/addrconf.c:3304
     addrconf_addr_gen+0x50e/0x620 net/ipv6/addrconf.c:3433
     addrconf_init_auto_addrs+0x77b/0xb20 net/ipv6/addrconf.c:-1
     addrconf_notify+0xb62/0x1010 net/ipv6/addrconf.c:3730
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4122 [inline]
     netdev_get_by_index+0x79/0xa0 net/core/dev.c:911
     fib6_nh_init+0x1f8/0x2060 net/ipv6/route.c:3584
     ip6_route_info_create+0x94d/0x1240 net/ipv6/route.c:3855
     addrconf_f6i_alloc+0x1fa/0x440 net/ipv6/route.c:4631
     ipv6_add_addr+0x5a4/0x10d0 net/ipv6/addrconf.c:1129
     addrconf_add_linklocal+0x273/0x6d0 net/ipv6/addrconf.c:3302
     addrconf_addr_gen+0x50e/0x620 net/ipv6/addrconf.c:3433
     addrconf_init_auto_addrs+0x77b/0xb20 net/ipv6/addrconf.c:-1
     addrconf_notify+0xb62/0x1010 net/ipv6/addrconf.c:3730
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4122 [inline]
     netdev_get_by_index+0x79/0xa0 net/core/dev.c:911
     fib6_nh_init+0x1f8/0x2060 net/ipv6/route.c:3584
     ip6_route_info_create+0x94d/0x1240 net/ipv6/route.c:3855
     ip6_route_add+0x28/0x160 net/ipv6/route.c:3899
     addrconf_add_mroute net/ipv6/addrconf.c:2522 [inline]
     addrconf_add_dev+0x29c/0x3b0 net/ipv6/addrconf.c:2540
     addrconf_dev_config net/ipv6/addrconf.c:3469 [inline]
     addrconf_init_auto_addrs+0x67e/0xb20 net/ipv6/addrconf.c:3557
     addrconf_notify+0xb62/0x1010 net/ipv6/addrconf.c:3730
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4122 [inline]
     netdev_get_by_index+0x79/0xa0 net/core/dev.c:911
     fib6_nh_init+0x1f8/0x2060 net/ipv6/route.c:3584
     ip6_route_info_create+0x94d/0x1240 net/ipv6/route.c:3855
     ip6_route_add+0x28/0x160 net/ipv6/route.c:3899
     addrconf_prefix_route net/ipv6/addrconf.c:2458 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3588 [inline]
     addrconf_permanent_addr+0x6c0/0xa30 net/ipv6/addrconf.c:3612
     addrconf_notify+0x996/0x1010 net/ipv6/addrconf.c:3684
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x4a9/0x6b0 net/socket.c:2200

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4122 [inline]
     netdev_get_by_index+0x79/0xa0 net/core/dev.c:911
     fib6_nh_init+0x1f8/0x2060 net/ipv6/route.c:3584
     ip6_route_info_create+0x94d/0x1240 net/ipv6/route.c:3855
     addrconf_f6i_alloc+0x1fa/0x440 net/ipv6/route.c:4631
     fixup_permanent_addr net/ipv6/addrconf.c:3573 [inline]
     addrconf_permanent_addr+0x28d/0xa30 net/ipv6/addrconf.c:3612
     addrconf_notify+0x996/0x1010 net/ipv6/addrconf.c:3684
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x4a9/0x6b0 net/socket.c:2200

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_hold include/linux/netdevice.h:4139 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
     fib_check_nh+0xd23/0x1a70 net/ipv4/fib_semantics.c:1259
     fib_create_info+0x142c/0x2460 net/ipv4/fib_semantics.c:1557
     fib_table_insert+0xc6/0x1b20 net/ipv4/fib_trie.c:1217
     fib_magic+0x2e5/0x3c0 net/ipv4/fib_frontend.c:1118
     fib_add_ifaddr+0x3fb/0x5e0 net/ipv4/fib_frontend.c:1162
     fib_netdev_event+0x389/0x490 net/ipv4/fib_frontend.c:1500
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x4a9/0x6b0 net/socket.c:2200

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
     netdev_hold include/linux/netdevice.h:4139 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
     fib_check_nh+0xd23/0x1a70 net/ipv4/fib_semantics.c:1259
     fib_create_info+0x142c/0x2460 net/ipv4/fib_semantics.c:1557
     fib_table_insert+0xc6/0x1b20 net/ipv4/fib_trie.c:1217
     fib_magic+0x2e5/0x3c0 net/ipv4/fib_frontend.c:1118
     fib_add_ifaddr+0x38d/0x5e0 net/ipv4/fib_frontend.c:1155
     fib_netdev_event+0x389/0x490 net/ipv4/fib_frontend.c:1500
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     call_netdevice_notifiers_extack net/core/dev.c:2077 [inline]
     call_netdevice_notifiers net/core/dev.c:2091 [inline]
     __dev_notify_flags+0x1aa/0x310 net/core/dev.c:8737
     dev_change_flags+0xe8/0x1a0 net/core/dev.c:8775
     do_setlink+0xc58/0x4130 net/core/rtnetlink.c:2905
     __rtnl_newlink net/core/rtnetlink.c:3703 [inline]
     rtnl_newlink+0x17da/0x20a0 net/core/rtnetlink.c:3750
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x4a9/0x6b0 net/socket.c:2200

ref_tracker: syz_tun@ffff8880280e05b8 has 1/9 users at
     fib_create_info+0x1f0f/0x2460 net/ipv4/fib_semantics.c:1551
     fib_table_insert+0xc6/0x1b20 net/ipv4/fib_trie.c:1217
     fib_magic+0x2e5/0x3c0 net/ipv4/fib_frontend.c:1118
     fib_add_ifaddr+0x144/0x5e0 net/ipv4/fib_frontend.c:1140
     fib_inetaddr_event+0x140/0x1d0 net/ipv4/fib_frontend.c:1454
     notifier_call_chain+0x197/0x380 kernel/notifier.c:93
     blocking_notifier_call_chain+0x6a/0x90 kernel/notifier.c:388
     __inet_insert_ifa+0x9bc/0xbd0 net/ipv4/devinet.c:570
     inet_rtm_newaddr+0xc1d/0x1ae0 net/ipv4/devinet.c:986
     rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6472
     netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894
     sock_sendmsg_nosec net/socket.c:730 [inline]
     __sock_sendmsg net/socket.c:745 [inline]
     __sys_sendto+0x4a9/0x6b0 net/socket.c:2200
     __do_sys_sendto net/socket.c:2212 [inline]
     __se_sys_sendto net/socket.c:2208 [inline]
     __x64_sys_sendto+0xde/0xf0 net/socket.c:2208
     do_syscall_x64 arch/x86/entry/common.c:46 [inline]
     do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76