unregister_netdevice: waiting for syz_tun to become free. Usage count = 10
ref_tracker: syz_tun@ffff888069ba4620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [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:1612
     __mkroute_output net/ipv4/route.c:2573 [inline]
     ip_route_output_key_hash_rcu+0x8a5/0x2770 net/ipv4/route.c:2795
     ip_route_output_key_hash+0x138/0x2e0 net/ipv4/route.c:2624
     __ip_route_output_key include/net/route.h:141 [inline]
     ip_route_output_flow+0x27/0x150 net/ipv4/route.c:2852
     ip_route_output_key include/net/route.h:151 [inline]
     geneve_link_config.part.0+0x243/0x5a0 drivers/net/geneve.c:1585
     geneve_link_config drivers/net/geneve.c:1579 [inline]
     geneve_newlink+0x271/0x2b0 drivers/net/geneve.c:1638
     rtnl_newlink_create net/core/rtnetlink.c:3539 [inline]
     __rtnl_newlink+0x119c/0x1920 net/core/rtnetlink.c:3759
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
     netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg net/socket.c:744 [inline]
     __sys_sendto+0x479/0x4d0 net/socket.c:2214
     __do_sys_sendto net/socket.c:2226 [inline]
     __se_sys_sendto net/socket.c:2222 [inline]
     __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2222

ref_tracker: syz_tun@ffff888069ba4620 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+0x7c/0xb0 net/core/dev.c:916
     fib6_nh_init+0x792/0x1da0 net/ipv6/route.c:3543
     ip6_route_info_create+0x11d7/0x1aa0 net/ipv6/route.c:3809
     ip6_route_add+0x26/0x1c0 net/ipv6/route.c:3853
     addrconf_prefix_route+0x2fe/0x510 net/ipv6/addrconf.c:2486
     addrconf_add_linklocal+0x32a/0x620 net/ipv6/addrconf.c:3319
     addrconf_addr_gen+0x37b/0x3d0 net/ipv6/addrconf.c:3448
     addrconf_dev_config net/ipv6/addrconf.c:3494 [inline]
     addrconf_init_auto_addrs+0x446/0x820 net/ipv6/addrconf.c:3572
     addrconf_notify+0xe91/0x19c0 net/ipv6/addrconf.c:3745
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772

ref_tracker: syz_tun@ffff888069ba4620 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+0x7c/0xb0 net/core/dev.c:916
     fib6_nh_init+0x792/0x1da0 net/ipv6/route.c:3543
     ip6_route_info_create+0x11d7/0x1aa0 net/ipv6/route.c:3809
     addrconf_f6i_alloc+0x393/0x670 net/ipv6/route.c:4588
     ipv6_add_addr+0x538/0x2060 net/ipv6/addrconf.c:1120
     addrconf_add_linklocal+0x2a6/0x620 net/ipv6/addrconf.c:3317
     addrconf_addr_gen+0x37b/0x3d0 net/ipv6/addrconf.c:3448
     addrconf_dev_config net/ipv6/addrconf.c:3494 [inline]
     addrconf_init_auto_addrs+0x446/0x820 net/ipv6/addrconf.c:3572
     addrconf_notify+0xe91/0x19c0 net/ipv6/addrconf.c:3745
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772

ref_tracker: syz_tun@ffff888069ba4620 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+0x7c/0xb0 net/core/dev.c:916
     fib6_nh_init+0x792/0x1da0 net/ipv6/route.c:3543
     ip6_route_info_create+0x11d7/0x1aa0 net/ipv6/route.c:3809
     ip6_route_add+0x26/0x1c0 net/ipv6/route.c:3853
     addrconf_add_mroute+0x1de/0x350 net/ipv6/addrconf.c:2550
     addrconf_add_dev+0x14e/0x1c0 net/ipv6/addrconf.c:2568
     addrconf_dev_config net/ipv6/addrconf.c:3484 [inline]
     addrconf_init_auto_addrs+0x380/0x820 net/ipv6/addrconf.c:3572
     addrconf_notify+0xe91/0x19c0 net/ipv6/addrconf.c:3745
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675

ref_tracker: syz_tun@ffff888069ba4620 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+0x7c/0xb0 net/core/dev.c:916
     fib6_nh_init+0x792/0x1da0 net/ipv6/route.c:3543
     ip6_route_info_create+0x11d7/0x1aa0 net/ipv6/route.c:3809
     ip6_route_add+0x26/0x1c0 net/ipv6/route.c:3853
     addrconf_prefix_route+0x2fe/0x510 net/ipv6/addrconf.c:2486
     fixup_permanent_addr net/ipv6/addrconf.c:3603 [inline]
     addrconf_permanent_addr net/ipv6/addrconf.c:3627 [inline]
     addrconf_notify+0x12bb/0x19c0 net/ipv6/addrconf.c:3699
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357

ref_tracker: syz_tun@ffff888069ba4620 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+0x7c/0xb0 net/core/dev.c:916
     fib6_nh_init+0x792/0x1da0 net/ipv6/route.c:3543
     ip6_route_info_create+0x11d7/0x1aa0 net/ipv6/route.c:3809
     addrconf_f6i_alloc+0x393/0x670 net/ipv6/route.c:4588
     fixup_permanent_addr net/ipv6/addrconf.c:3588 [inline]
     addrconf_permanent_addr net/ipv6/addrconf.c:3627 [inline]
     addrconf_notify+0x109f/0x19c0 net/ipv6/addrconf.c:3699
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
     netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901

ref_tracker: syz_tun@ffff888069ba4620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     netdev_hold include/linux/netdevice.h:4086 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1238 [inline]
     fib_check_nh+0x271/0x620 net/ipv4/fib_semantics.c:1258
     fib_create_info+0x23e8/0x4cf0 net/ipv4/fib_semantics.c:1556
     fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1237
     fib_magic+0x4d6/0x5c0 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x4c0/0x560 net/ipv4/fib_frontend.c:1148
     fib_netdev_event+0x38a/0x710 net/ipv4/fib_frontend.c:1486
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357

ref_tracker: syz_tun@ffff888069ba4620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_hold include/linux/netdevice.h:4091 [inline]
     netdev_hold include/linux/netdevice.h:4086 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1238 [inline]
     fib_check_nh+0x271/0x620 net/ipv4/fib_semantics.c:1258
     fib_create_info+0x23e8/0x4cf0 net/ipv4/fib_semantics.c:1556
     fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1237
     fib_magic+0x4d6/0x5c0 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x393/0x560 net/ipv4/fib_frontend.c:1141
     fib_netdev_event+0x38a/0x710 net/ipv4/fib_frontend.c:1486
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
     call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
     call_netdevice_notifiers net/core/dev.c:2048 [inline]
     __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8884
     dev_change_flags+0x10c/0x160 net/core/dev.c:8922
     do_setlink+0x19dd/0x3ee0 net/core/rtnetlink.c:2929
     __rtnl_newlink+0xc3a/0x1920 net/core/rtnetlink.c:3725
     rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357

ref_tracker: syz_tun@ffff888069ba4620 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4074 [inline]
     fib_create_info+0x32af/0x4cf0 net/ipv4/fib_semantics.c:1550
     fib_table_insert+0x1d7/0x1d70 net/ipv4/fib_trie.c:1237
     fib_magic+0x4d6/0x5c0 net/ipv4/fib_frontend.c:1104
     fib_add_ifaddr+0x174/0x560 net/ipv4/fib_frontend.c:1126
     fib_inetaddr_event+0x174/0x2c0 net/ipv4/fib_frontend.c:1440
     notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
     blocking_notifier_call_chain kernel/notifier.c:388 [inline]
     blocking_notifier_call_chain+0x69/0xa0 kernel/notifier.c:376
     __inet_insert_ifa+0x93f/0xc30 net/ipv4/devinet.c:586
     inet_rtm_newaddr+0x565/0xae0 net/ipv4/devinet.c:997
     rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
     netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2551
     netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
     netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
     netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
     sock_sendmsg_nosec net/socket.c:729 [inline]
     __sock_sendmsg net/socket.c:744 [inline]
     __sys_sendto+0x479/0x4d0 net/socket.c:2214
     __do_sys_sendto net/socket.c:2226 [inline]
     __se_sys_sendto net/socket.c:2222 [inline]
     __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2222
     do_syscall_x64 arch/x86/entry/common.c:52 [inline]
     do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83