unregister_netdevice: waiting for syz_tun to become free. Usage count = 10
ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_hold include/linux/netdevice.h:4370 [inline]
     dst_init+0xbc/0x3e4 net/core/dst.c:52
     dst_alloc+0x118/0x168 net/core/dst.c:93
     rt_dst_alloc net/ipv4/route.c:1642 [inline]
     __mkroute_output net/ipv4/route.c:2643 [inline]
     ip_route_output_key_hash_rcu+0x106c/0x1e08 net/ipv4/route.c:2864
     ip_route_output_key_hash+0x170/0x290 net/ipv4/route.c:2694
     __ip_route_output_key include/net/route.h:169 [inline]
     ip_route_output_flow+0x3c/0x160 net/ipv4/route.c:2921
     ip_route_output_key include/net/route.h:179 [inline]
     geneve_link_config+0x15c/0x518 drivers/net/geneve.c:1618
     geneve_newlink+0x1a8/0x200 drivers/net/geneve.c:1676
     rtnl_newlink_create+0x28c/0x9ac net/core/rtnetlink.c:3823
     __rtnl_newlink net/core/rtnetlink.c:3940 [inline]
     rtnl_newlink+0x1194/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
     netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339
     netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1883
     sock_sendmsg_nosec net/socket.c:712 [inline]
     __sock_sendmsg net/socket.c:727 [inline]
     __sys_sendto+0x36c/0x4f4 net/socket.c:2180
     __do_sys_sendto net/socket.c:2187 [inline]
     __se_sys_sendto net/socket.c:2183 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2183

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4353 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:1008
     fib6_nh_init+0x198/0x1960 net/ipv6/route.c:3592
     ip6_route_info_create_nh+0x11c/0x98c net/ipv6/route.c:3845
     ip6_route_add+0x64/0x1bc net/ipv6/route.c:3893
     addrconf_prefix_route net/ipv6/addrconf.c:2487 [inline]
     addrconf_add_linklocal+0x390/0x5d4 net/ipv6/addrconf.c:3312
     addrconf_addr_gen+0x38c/0x464 net/ipv6/addrconf.c:3441
     addrconf_init_auto_addrs+0x5a4/0x990 net/ipv6/addrconf.c:-1
     addrconf_notify+0x8cc/0xcdc net/ipv6/addrconf.c:3744
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     call_netdevice_notifiers_info net/core/dev.c:2230 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
     call_netdevice_notifiers net/core/dev.c:2282 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9526
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3141
     rtnl_changelink net/core/rtnetlink.c:3759 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4353 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:1008
     fib6_nh_init+0x198/0x1960 net/ipv6/route.c:3592
     ip6_route_info_create_nh+0x11c/0x98c net/ipv6/route.c:3845
     addrconf_f6i_alloc+0x1c4/0x378 net/ipv6/route.c:4683
     ipv6_add_addr+0x458/0xdb8 net/ipv6/addrconf.c:1121
     addrconf_add_linklocal+0x230/0x5d4 net/ipv6/addrconf.c:3310
     addrconf_addr_gen+0x38c/0x464 net/ipv6/addrconf.c:3441
     addrconf_init_auto_addrs+0x5a4/0x990 net/ipv6/addrconf.c:-1
     addrconf_notify+0x8cc/0xcdc net/ipv6/addrconf.c:3744
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     call_netdevice_notifiers_info net/core/dev.c:2230 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
     call_netdevice_notifiers net/core/dev.c:2282 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9526
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3141
     rtnl_changelink net/core/rtnetlink.c:3759 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4353 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:1008
     fib6_nh_init+0x198/0x1960 net/ipv6/route.c:3592
     ip6_route_info_create_nh+0x11c/0x98c net/ipv6/route.c:3845
     ip6_route_add+0x64/0x1bc net/ipv6/route.c:3893
     addrconf_add_mroute net/ipv6/addrconf.c:2551 [inline]
     addrconf_add_dev+0x204/0x2e4 net/ipv6/addrconf.c:2569
     addrconf_dev_config net/ipv6/addrconf.c:3477 [inline]
     addrconf_init_auto_addrs+0x4d4/0x990 net/ipv6/addrconf.c:3571
     addrconf_notify+0x8cc/0xcdc net/ipv6/addrconf.c:3744
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     call_netdevice_notifiers_info net/core/dev.c:2230 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
     call_netdevice_notifiers net/core/dev.c:2282 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9526
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3141
     rtnl_changelink net/core/rtnetlink.c:3759 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4353 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:1008
     fib6_nh_init+0x198/0x1960 net/ipv6/route.c:3592
     ip6_route_info_create_nh+0x11c/0x98c net/ipv6/route.c:3845
     ip6_route_add+0x64/0x1bc net/ipv6/route.c:3893
     addrconf_prefix_route net/ipv6/addrconf.c:2487 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3602 [inline]
     addrconf_permanent_addr+0x53c/0x898 net/ipv6/addrconf.c:3626
     addrconf_notify+0x7bc/0xcdc net/ipv6/addrconf.c:3698
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     call_netdevice_notifiers_info net/core/dev.c:2230 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
     call_netdevice_notifiers net/core/dev.c:2282 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9526
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3141
     rtnl_changelink net/core/rtnetlink.c:3759 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
     netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_hold include/linux/netdevice.h:4370 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1268 [inline]
     fib_check_nh+0x974/0x1510 net/ipv4/fib_semantics.c:1288
     fib_create_info+0x1b18/0x2940 net/ipv4/fib_semantics.c:1508
     fib_table_insert+0xac/0x1364 net/ipv4/fib_trie.c:1212
     fib_magic+0x250/0x31c net/ipv4/fib_frontend.c:1133
     fib_add_ifaddr+0x33c/0x4f8 net/ipv4/fib_frontend.c:1177
     fib_netdev_event+0x35c/0x4a0 net/ipv4/fib_frontend.c:1515
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     call_netdevice_notifiers_info net/core/dev.c:2230 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
     call_netdevice_notifiers net/core/dev.c:2282 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9526
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3141
     rtnl_changelink net/core/rtnetlink.c:3759 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
     netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_hold include/linux/netdevice.h:4370 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1268 [inline]
     fib_check_nh+0x974/0x1510 net/ipv4/fib_semantics.c:1288
     fib_create_info+0x1b18/0x2940 net/ipv4/fib_semantics.c:1508
     fib_table_insert+0xac/0x1364 net/ipv4/fib_trie.c:1212
     fib_magic+0x250/0x31c net/ipv4/fib_frontend.c:1133
     fib_add_ifaddr+0x2ec/0x4f8 net/ipv4/fib_frontend.c:1170
     fib_netdev_event+0x35c/0x4a0 net/ipv4/fib_frontend.c:1515
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     call_netdevice_notifiers_info net/core/dev.c:2230 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
     call_netdevice_notifiers net/core/dev.c:2282 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9526
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3141
     rtnl_changelink net/core/rtnetlink.c:3759 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3918 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4055
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
     netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4353 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:1008
     fib6_nh_init+0x198/0x1960 net/ipv6/route.c:3592
     ip6_route_info_create_nh+0x11c/0x98c net/ipv6/route.c:3845
     addrconf_f6i_alloc+0x1c4/0x378 net/ipv6/route.c:4683
     ipv6_add_addr+0x458/0xdb8 net/ipv6/addrconf.c:1121
     inet6_addr_add+0x350/0xafc net/ipv6/addrconf.c:3049
     inet6_rtm_newaddr+0x730/0xaa8 net/ipv6/addrconf.c:5063
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
     netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339
     netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1883
     sock_sendmsg_nosec net/socket.c:712 [inline]
     __sock_sendmsg net/socket.c:727 [inline]
     __sys_sendto+0x36c/0x4f4 net/socket.c:2180
     __do_sys_sendto net/socket.c:2187 [inline]
     __se_sys_sendto net/socket.c:2183 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2183
     __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
     invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
     el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132

ref_tracker: syz_tun@00000000c6628800 has 1/9 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4341 [inline]
     netdev_tracker_alloc+0x68/0xb4 include/linux/netdevice.h:4353
     fib_create_info+0x22c4/0x2940 net/ipv4/fib_semantics.c:1502
     fib_table_insert+0xac/0x1364 net/ipv4/fib_trie.c:1212
     fib_magic+0x250/0x31c net/ipv4/fib_frontend.c:1133
     fib_add_ifaddr+0x118/0x4f8 net/ipv4/fib_frontend.c:1155
     fib_inetaddr_event+0x114/0x1d0 net/ipv4/fib_frontend.c:1469
     notifier_call_chain+0x1b8/0x4e4 kernel/notifier.c:85
     blocking_notifier_call_chain+0x70/0xa0 kernel/notifier.c:380
     __inet_insert_ifa+0x8d8/0xa98 net/ipv4/devinet.c:567
     inet_rtm_newaddr+0xe10/0x1674 net/ipv4/devinet.c:1002
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6944
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2534
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6971
     netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
     netlink_unicast+0x60c/0x824 net/netlink/af_netlink.c:1339
     netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1883
     sock_sendmsg_nosec net/socket.c:712 [inline]
     __sock_sendmsg net/socket.c:727 [inline]
     __sys_sendto+0x36c/0x4f4 net/socket.c:2180