unregister_netdevice: waiting for syz_tun to become free. Usage count = 10
ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     dst_init+0xee/0x490 net/core/dst.c:52
     dst_alloc+0x14f/0x190 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+0x13cc/0x2390 net/ipv4/route.c:2795
     ip_route_output_key_hash+0x193/0x2b0 net/ipv4/route.c:2624
     __ip_route_output_key include/net/route.h:141 [inline]
     ip_route_output_flow+0x29/0x140 net/ipv4/route.c:2852
     ip_route_output_key include/net/route.h:151 [inline]
     geneve_link_config+0x1a7/0x640 drivers/net/geneve.c:1585
     geneve_newlink+0x139/0x1b0 drivers/net/geneve.c:1638
     rtnl_newlink_create net/core/rtnetlink.c:3539 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3759 [inline]
     rtnl_newlink+0x1591/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg+0x221/0x270 net/socket.c:744
     __sys_sendto+0x39b/0x4f0 net/socket.c:2214
     __do_sys_sendto net/socket.c:2226 [inline]
     __se_sys_sendto net/socket.c:2222 [inline]
     __x64_sys_sendto+0xde/0x100 net/socket.c:2222
     do_syscall_x64 arch/x86/entry/common.c:52 [inline]
     do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4074 [inline]
     netdev_get_by_index+0x7a/0xb0 net/core/dev.c:916
     fib6_nh_init+0x1d8/0x2180 net/ipv6/route.c:3543
     ip6_route_info_create+0x999/0x12b0 net/ipv6/route.c:3809
     ip6_route_add+0x28/0x160 net/ipv6/route.c:3853
     addrconf_prefix_route net/ipv6/addrconf.c:2486 [inline]
     addrconf_add_linklocal+0x61a/0xa30 net/ipv6/addrconf.c:3319
     addrconf_addr_gen+0x510/0xbb0
     addrconf_dev_config net/ipv6/addrconf.c:3494 [inline]
     addrconf_init_auto_addrs+0x96a/0xeb0 net/ipv6/addrconf.c:3572
     addrconf_notify+0xaff/0x1020 net/ipv6/addrconf.c:3745
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4074 [inline]
     netdev_get_by_index+0x7a/0xb0 net/core/dev.c:916
     fib6_nh_init+0x1d8/0x2180 net/ipv6/route.c:3543
     ip6_route_info_create+0x999/0x12b0 net/ipv6/route.c:3809
     addrconf_f6i_alloc+0x3c2/0x7f0 net/ipv6/route.c:4588
     ipv6_add_addr+0x5b6/0x1090 net/ipv6/addrconf.c:1120
     addrconf_add_linklocal+0x36c/0xa30 net/ipv6/addrconf.c:3317
     addrconf_addr_gen+0x510/0xbb0
     addrconf_dev_config net/ipv6/addrconf.c:3494 [inline]
     addrconf_init_auto_addrs+0x96a/0xeb0 net/ipv6/addrconf.c:3572
     addrconf_notify+0xaff/0x1020 net/ipv6/addrconf.c:3745
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4074 [inline]
     netdev_get_by_index+0x7a/0xb0 net/core/dev.c:916
     fib6_nh_init+0x1d8/0x2180 net/ipv6/route.c:3543
     ip6_route_info_create+0x999/0x12b0 net/ipv6/route.c:3809
     ip6_route_add+0x28/0x160 net/ipv6/route.c:3853
     addrconf_add_mroute net/ipv6/addrconf.c:2550 [inline]
     addrconf_add_dev+0x35b/0x540 net/ipv6/addrconf.c:2568
     addrconf_dev_config net/ipv6/addrconf.c:3484 [inline]
     addrconf_init_auto_addrs+0x85f/0xeb0 net/ipv6/addrconf.c:3572
     addrconf_notify+0xaff/0x1020 net/ipv6/addrconf.c:3745
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4074 [inline]
     netdev_get_by_index+0x7a/0xb0 net/core/dev.c:916
     fib6_nh_init+0x1d8/0x2180 net/ipv6/route.c:3543
     ip6_route_info_create+0x999/0x12b0 net/ipv6/route.c:3809
     ip6_route_add+0x28/0x160 net/ipv6/route.c:3853
     addrconf_prefix_route net/ipv6/addrconf.c:2486 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3603 [inline]
     addrconf_permanent_addr+0x7c7/0xc50 net/ipv6/addrconf.c:3627
     addrconf_notify+0x9f5/0x1020 net/ipv6/addrconf.c:3699
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg+0x221/0x270 net/socket.c:744

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4074 [inline]
     netdev_get_by_index+0x7a/0xb0 net/core/dev.c:916
     fib6_nh_init+0x1d8/0x2180 net/ipv6/route.c:3543
     ip6_route_info_create+0x999/0x12b0 net/ipv6/route.c:3809
     addrconf_f6i_alloc+0x3c2/0x7f0 net/ipv6/route.c:4588
     fixup_permanent_addr net/ipv6/addrconf.c:3588 [inline]
     addrconf_permanent_addr+0x2c8/0xc50 net/ipv6/addrconf.c:3627
     addrconf_notify+0x9f5/0x1020 net/ipv6/addrconf.c:3699
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg+0x221/0x270 net/socket.c:744

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1238 [inline]
     fib_check_nh+0xd17/0x1bd0 net/ipv4/fib_semantics.c:1258
     fib_create_info+0x1467/0x24e0 net/ipv4/fib_semantics.c:1556
     fib_table_insert+0x1f6/0x1f30 net/ipv4/fib_trie.c:1237
     fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x40c/0x5e0 net/ipv4/fib_frontend.c:1148
     fib_netdev_event+0x375/0x490 net/ipv4/fib_frontend.c:1486
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg+0x221/0x270 net/socket.c:744

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1238 [inline]
     fib_check_nh+0xd17/0x1bd0 net/ipv4/fib_semantics.c:1258
     fib_create_info+0x1467/0x24e0 net/ipv4/fib_semantics.c:1556
     fib_table_insert+0x1f6/0x1f30 net/ipv4/fib_trie.c:1237
     fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x398/0x5e0 net/ipv4/fib_frontend.c:1141
     fib_netdev_event+0x375/0x490 net/ipv4/fib_frontend.c:1486
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     __dev_notify_flags+0x207/0x400
     dev_change_flags+0xf0/0x1a0 net/core/dev.c:8922
     do_setlink+0xcd0/0x41f0 net/core/rtnetlink.c:2929
     __rtnl_newlink net/core/rtnetlink.c:3725 [inline]
     rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg+0x221/0x270 net/socket.c:744

ref_tracker: syz_tun@ffff88805eb18620 has 1/9 users at
     fib_create_info+0x1f7a/0x24e0 net/ipv4/fib_semantics.c:1550
     fib_table_insert+0x1f6/0x1f30 net/ipv4/fib_trie.c:1237
     fib_magic+0x3d8/0x620 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x14c/0x5e0 net/ipv4/fib_frontend.c:1126
     fib_inetaddr_event+0x167/0x1f0 net/ipv4/fib_frontend.c:1440
     notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93
     blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:388
     __inet_insert_ifa+0x9d4/0xc30 net/ipv4/devinet.c:586
     inet_rtm_newaddr+0xc15/0x1b20 net/ipv4/devinet.c:997
     rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2536
     netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
     netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1342
     netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1886
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg+0x221/0x270 net/socket.c:744
     __sys_sendto+0x39b/0x4f0 net/socket.c:2214
     __do_sys_sendto net/socket.c:2226 [inline]
     __se_sys_sendto net/socket.c:2222 [inline]
     __x64_sys_sendto+0xde/0x100 net/socket.c:2222