unregister_netdevice: waiting for syz_tun to become free. Usage count = 19
ref_tracker: netdev@00000000079cbe05 has 6/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4361 [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:3892
     ip6_route_add+0x8c/0x1e4 net/ipv6/route.c:3944
     rt6_add_dflt_router+0x140/0x258 net/ipv6/route.c:4479
     ndisc_router_discovery+0x1488/0x33e8 net/ipv6/ndisc.c:1374
     ndisc_rcv+0x3f0/0x724 net/ipv6/ndisc.c:1841
     icmpv6_rcv+0xffc/0x1888 net/ipv6/icmp.c:990
     ip6_protocol_deliver_rcu+0x9a4/0x12d4 net/ipv6/ip6_input.c:438
     ip6_input_finish+0x154/0x350 net/ipv6/ip6_input.c:489
     NF_HOOK+0x2c4/0x358 include/linux/netfilter.h:318
     ip6_input+0x15c/0x270 net/ipv6/ip6_input.c:500
     ip6_mc_input+0x5b4/0xa14 net/ipv6/ip6_input.c:590
     dst_input include/net/dst.h:471 [inline]
     ip6_rcv_finish+0x1f0/0x21c net/ipv6/ip6_input.c:79
     NF_HOOK+0x2c4/0x358 include/linux/netfilter.h:318
     ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:311

ref_tracker: netdev@00000000079cbe05 has 2/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_hold include/linux/netdevice.h:4378 [inline]
     dst_init+0xbc/0x3e4 net/core/dst.c:52
     dst_alloc+0x118/0x168 net/core/dst.c:93
     ip6_dst_alloc net/ipv6/route.c:342 [inline]
     ip6_rt_pcpu_alloc net/ipv6/route.c:1418 [inline]
     rt6_make_pcpu_route net/ipv6/route.c:1467 [inline]
     ip6_pol_route+0x8d8/0x1014 net/ipv6/route.c:2305
     ip6_pol_route_input+0x74/0x94 net/ipv6/route.c:2326
     pol_lookup_func include/net/ip6_fib.h:617 [inline]
     fib6_rule_lookup+0x174/0x45c net/ipv6/fib6_rules.c:120
     ip6_route_input_lookup net/ipv6/route.c:2338 [inline]
     ip6_route_input+0x5d0/0x8d4 net/ipv6/route.c:2641
     ip6_rcv_finish_core+0x218/0x3c8 net/ipv6/ip6_input.c:66
     ip6_rcv_finish+0x120/0x21c net/ipv6/ip6_input.c:77
     NF_HOOK+0x2c4/0x358 include/linux/netfilter.h:318
     ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:311
     __netif_receive_skb_one_core net/core/dev.c:5991 [inline]
     __netif_receive_skb+0xcc/0x2a8 net/core/dev.c:6104
     netif_receive_skb_internal net/core/dev.c:6190 [inline]
     netif_receive_skb+0x1e0/0x838 net/core/dev.c:6249
     tun_rx_batched+0x478/0x5b4 drivers/net/tun.c:-1
     tun_get_user+0x2278/0x3538 drivers/net/tun.c:1950
     tun_chr_write_iter+0xfc/0x204 drivers/net/tun.c:1996
     new_sync_write fs/read_write.c:593 [inline]
     vfs_write+0x540/0xa3c fs/read_write.c:686

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_hold include/linux/netdevice.h:4378 [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:1645 [inline]
     __mkroute_output net/ipv4/route.c:2649 [inline]
     ip_route_output_key_hash_rcu+0x102c/0x1dfc net/ipv4/route.c:2870
     ip_route_output_key_hash+0x170/0x290 net/ipv4/route.c:2700
     __ip_route_output_key include/net/route.h:169 [inline]
     ip_route_output_flow+0x3c/0x160 net/ipv4/route.c:2927
     ip_route_output_key include/net/route.h:179 [inline]
     geneve_link_config+0x15c/0x518 drivers/net/geneve.c:1620
     geneve_newlink+0x1a8/0x200 drivers/net/geneve.c:1678
     rtnl_newlink_create+0x28c/0x9ac net/core/rtnetlink.c:3825
     __rtnl_newlink net/core/rtnetlink.c:3942 [inline]
     rtnl_newlink+0x1194/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6973
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x694/0x8c4 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:714 [inline]
     __sock_sendmsg net/socket.c:729 [inline]
     __sys_sendto+0x36c/0x4f4 net/socket.c:2228
     __do_sys_sendto net/socket.c:2235 [inline]
     __se_sys_sendto net/socket.c:2231 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2231

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4361 [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:3892
     ip6_route_add+0x8c/0x1e4 net/ipv6/route.c:3944
     addrconf_prefix_route net/ipv6/addrconf.c:2488 [inline]
     addrconf_add_linklocal+0x390/0x5d4 net/ipv6/addrconf.c:3313
     addrconf_addr_gen+0x38c/0x464 net/ipv6/addrconf.c:3442
     addrconf_init_auto_addrs+0x4f0/0x890 net/ipv6/addrconf.c:-1
     addrconf_notify+0x8cc/0xcdc net/ipv6/addrconf.c:3740
     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:2229 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9617
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3143
     rtnl_changelink net/core/rtnetlink.c:3761 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4361 [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:3892
     addrconf_f6i_alloc+0x1c4/0x378 net/ipv6/route.c:4684
     ipv6_add_addr+0x458/0xdb8 net/ipv6/addrconf.c:1126
     addrconf_add_linklocal+0x230/0x5d4 net/ipv6/addrconf.c:3311
     addrconf_addr_gen+0x38c/0x464 net/ipv6/addrconf.c:3442
     addrconf_init_auto_addrs+0x4f0/0x890 net/ipv6/addrconf.c:-1
     addrconf_notify+0x8cc/0xcdc net/ipv6/addrconf.c:3740
     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:2229 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9617
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3143
     rtnl_changelink net/core/rtnetlink.c:3761 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4361 [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:3892
     ip6_route_add+0x8c/0x1e4 net/ipv6/route.c:3944
     addrconf_add_mroute net/ipv6/addrconf.c:2552 [inline]
     addrconf_add_dev+0x204/0x2e4 net/ipv6/addrconf.c:2570
     addrconf_dev_config net/ipv6/addrconf.c:3479 [inline]
     addrconf_init_auto_addrs+0x464/0x890 net/ipv6/addrconf.c:3567
     addrconf_notify+0x8cc/0xcdc net/ipv6/addrconf.c:3740
     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:2229 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9617
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3143
     rtnl_changelink net/core/rtnetlink.c:3761 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6973

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4361 [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:3892
     ip6_route_add+0x8c/0x1e4 net/ipv6/route.c:3944
     addrconf_prefix_route net/ipv6/addrconf.c:2488 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3598 [inline]
     addrconf_permanent_addr+0x53c/0x898 net/ipv6/addrconf.c:3622
     addrconf_notify+0x7bc/0xcdc net/ipv6/addrconf.c:3694
     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:2229 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9617
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3143
     rtnl_changelink net/core/rtnetlink.c:3761 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6973
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x694/0x8c4 net/netlink/af_netlink.c:1346

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_hold include/linux/netdevice.h:4378 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1263 [inline]
     fib_check_nh+0x974/0x1510 net/ipv4/fib_semantics.c:1283
     fib_create_info+0x1b18/0x2940 net/ipv4/fib_semantics.c:1503
     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:2229 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9617
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3143
     rtnl_changelink net/core/rtnetlink.c:3761 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6973
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x694/0x8c4 net/netlink/af_netlink.c:1346

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_hold include/linux/netdevice.h:4378 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1263 [inline]
     fib_check_nh+0x974/0x1510 net/ipv4/fib_semantics.c:1283
     fib_create_info+0x1b18/0x2940 net/ipv4/fib_semantics.c:1503
     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:2229 [inline]
     call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
     call_netdevice_notifiers net/core/dev.c:2281 [inline]
     __dev_notify_flags+0x260/0x47c net/core/dev.c:-1
     netif_change_flags+0xd0/0x15c net/core/dev.c:9617
     do_setlink+0xa58/0x3658 net/core/rtnetlink.c:3143
     rtnl_changelink net/core/rtnetlink.c:3761 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3920 [inline]
     rtnl_newlink+0x10f8/0x15dc net/core/rtnetlink.c:4057
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6973
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x694/0x8c4 net/netlink/af_netlink.c:1346

ref_tracker: netdev@00000000079cbe05 has 1/18 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4349 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4361 [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:3892
     addrconf_f6i_alloc+0x1c4/0x378 net/ipv6/route.c:4684
     ipv6_add_addr+0x458/0xdb8 net/ipv6/addrconf.c:1126
     inet6_addr_add+0x350/0xafc net/ipv6/addrconf.c:3050
     inet6_rtm_newaddr+0x730/0xaa8 net/ipv6/addrconf.c:5059
     rtnetlink_rcv_msg+0x664/0x97c net/core/rtnetlink.c:6946
     netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6973
     netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
     netlink_unicast+0x694/0x8c4 net/netlink/af_netlink.c:1346
     netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1896
     sock_sendmsg_nosec net/socket.c:714 [inline]
     __sock_sendmsg net/socket.c:729 [inline]
     __sys_sendto+0x36c/0x4f4 net/socket.c:2228
     __do_sys_sendto net/socket.c:2235 [inline]
     __se_sys_sendto net/socket.c:2231 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2231
     __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: netdev@00000000079cbe05 skipped reports about 2/18 users.