unregister_netdevice: waiting for syz_tun to become free. Usage count = 13 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_hold include/linux/netdevice.h:4072 [inline] dst_init+0xc0/0x3bc net/core/dst.c:52 dst_alloc+0x120/0x170 net/core/dst.c:92 ip6_dst_alloc net/ipv6/route.c:345 [inline] ip6_rt_pcpu_alloc net/ipv6/route.c:1378 [inline] rt6_make_pcpu_route net/ipv6/route.c:1427 [inline] ip6_pol_route+0xa90/0x12e0 net/ipv6/route.c:2261 ip6_pol_route_output+0x70/0x94 net/ipv6/route.c:2600 pol_lookup_func include/net/ip6_fib.h:579 [inline] fib6_rule_lookup+0x2dc/0x560 net/ipv6/fib6_rules.c:121 ip6_route_output_flags_noref+0x254/0x324 net/ipv6/route.c:2632 ip6_route_output_flags+0xe4/0x374 net/ipv6/route.c:2645 ip6_route_output include/net/ip6_route.h:98 [inline] icmpv6_rt_has_prefsrc+0x54/0x3b0 net/ipv6/icmp.c:246 icmp6_send+0xa28/0x1b8c net/ipv6/icmp.c:564 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_pkt_drop+0x6cc/0x95c net/ipv6/route.c:4523 ip6_pkt_discard+0x28/0x3c net/ipv6/route.c:4530 dst_input include/net/dst.h:454 [inline] ip6_rcv_finish+0x1f4/0x220 net/ipv6/ip6_input.c:79 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:302 ipv6_rcv+0x98/0xb8 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5538 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5652 netif_receive_skb_internal net/core/dev.c:5738 [inline] netif_receive_skb+0x204/0x9f4 net/core/dev.c:5797 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_hold include/linux/netdevice.h:4072 [inline] dst_init+0xc0/0x3bc net/core/dst.c:52 dst_alloc+0x120/0x170 net/core/dst.c:92 ip6_dst_alloc net/ipv6/route.c:345 [inline] ip6_rt_pcpu_alloc net/ipv6/route.c:1378 [inline] rt6_make_pcpu_route net/ipv6/route.c:1427 [inline] ip6_pol_route+0xa90/0x12e0 net/ipv6/route.c:2261 ip6_pol_route_input+0x74/0x94 net/ipv6/route.c:2282 pol_lookup_func include/net/ip6_fib.h:579 [inline] fib6_rule_lookup+0x1f8/0x560 net/ipv6/fib6_rules.c:116 ip6_route_input_lookup net/ipv6/route.c:2294 [inline] ip6_route_input+0x698/0xb0c net/ipv6/route.c:2590 ip6_rcv_finish_core+0x218/0x3c8 net/ipv6/ip6_input.c:66 ip6_rcv_finish+0x124/0x220 net/ipv6/ip6_input.c:77 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:302 ipv6_rcv+0x98/0xb8 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5538 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5652 netif_receive_skb_internal net/core/dev.c:5738 [inline] netif_receive_skb+0x204/0x9f4 net/core/dev.c:5797 tun_rx_batched+0x568/0x6e4 tun_get_user+0x2438/0x386c drivers/net/tun.c:1998 tun_chr_write_iter+0xfc/0x204 drivers/net/tun.c:2044 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x610/0x91c fs/read_write.c:584 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_hold include/linux/netdevice.h:4072 [inline] dst_init+0xc0/0x3bc net/core/dst.c:52 dst_alloc+0x120/0x170 net/core/dst.c:92 rt_dst_alloc net/ipv4/route.c:1627 [inline] __mkroute_output net/ipv4/route.c:2590 [inline] ip_route_output_key_hash_rcu+0x11d4/0x1eec net/ipv4/route.c:2812 ip_route_output_key_hash+0x1b4/0x328 net/ipv4/route.c:2641 __ip_route_output_key include/net/route.h:137 [inline] ip_route_output_flow+0x3c/0x160 net/ipv4/route.c:2871 ip_route_output_key include/net/route.h:153 [inline] geneve_link_config+0x174/0x550 drivers/net/geneve.c:1650 geneve_newlink+0x13c/0x1b4 drivers/net/geneve.c:1703 rtnl_newlink_create net/core/rtnetlink.c:3419 [inline] __rtnl_newlink net/core/rtnetlink.c:3639 [inline] rtnl_newlink+0x116c/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2153 __do_sys_sendto net/socket.c:2165 [inline] __se_sys_sendto net/socket.c:2161 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2161 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_tracker_alloc include/linux/netdevice.h:4055 [inline] fib6_nh_init+0x640/0x1ca0 net/ipv6/route.c:3626 ip6_route_info_create+0x7ac/0xf14 net/ipv6/route.c:3804 ip6_route_add+0x38/0x168 net/ipv6/route.c:3848 addrconf_prefix_route net/ipv6/addrconf.c:2443 [inline] addrconf_add_linklocal+0x46c/0x854 net/ipv6/addrconf.c:3263 addrconf_addr_gen+0x3a8/0x930 net/ipv6/addrconf.c:3392 addrconf_init_auto_addrs+0x794/0xc9c addrconf_notify+0x7d0/0xc94 net/ipv6/addrconf.c:3688 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_tracker_alloc include/linux/netdevice.h:4055 [inline] fib6_nh_init+0x640/0x1ca0 net/ipv6/route.c:3626 ip6_route_info_create+0x7ac/0xf14 net/ipv6/route.c:3804 addrconf_f6i_alloc+0x2c0/0x5cc net/ipv6/route.c:4579 ipv6_add_addr+0x3d0/0xc9c net/ipv6/addrconf.c:1121 addrconf_add_linklocal+0x264/0x854 net/ipv6/addrconf.c:3261 addrconf_addr_gen+0x3a8/0x930 net/ipv6/addrconf.c:3392 addrconf_init_auto_addrs+0x794/0xc9c addrconf_notify+0x7d0/0xc94 net/ipv6/addrconf.c:3688 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_tracker_alloc include/linux/netdevice.h:4055 [inline] fib6_nh_init+0x640/0x1ca0 net/ipv6/route.c:3626 ip6_route_info_create+0x7ac/0xf14 net/ipv6/route.c:3804 ip6_route_add+0x38/0x168 net/ipv6/route.c:3848 addrconf_add_mroute net/ipv6/addrconf.c:2507 [inline] addrconf_add_dev+0x2b8/0x458 net/ipv6/addrconf.c:2525 addrconf_dev_config net/ipv6/addrconf.c:3428 [inline] addrconf_init_auto_addrs+0x708/0xc9c net/ipv6/addrconf.c:3515 addrconf_notify+0x7d0/0xc94 net/ipv6/addrconf.c:3688 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_tracker_alloc include/linux/netdevice.h:4055 [inline] fib6_nh_init+0x640/0x1ca0 net/ipv6/route.c:3626 ip6_route_info_create+0x7ac/0xf14 net/ipv6/route.c:3804 ip6_route_add+0x38/0x168 net/ipv6/route.c:3848 addrconf_prefix_route net/ipv6/addrconf.c:2443 [inline] fixup_permanent_addr net/ipv6/addrconf.c:3546 [inline] addrconf_permanent_addr+0x61c/0xa8c net/ipv6/addrconf.c:3570 addrconf_notify+0x7ac/0xc94 net/ipv6/addrconf.c:3642 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2153 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_tracker_alloc include/linux/netdevice.h:4055 [inline] fib6_nh_init+0x640/0x1ca0 net/ipv6/route.c:3626 ip6_route_info_create+0x7ac/0xf14 net/ipv6/route.c:3804 addrconf_f6i_alloc+0x2c0/0x5cc net/ipv6/route.c:4579 fixup_permanent_addr net/ipv6/addrconf.c:3531 [inline] addrconf_permanent_addr+0x23c/0xa8c net/ipv6/addrconf.c:3570 addrconf_notify+0x7ac/0xc94 net/ipv6/addrconf.c:3642 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2153 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_hold include/linux/netdevice.h:4072 [inline] fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline] fib_check_nh+0xa84/0x17a4 net/ipv4/fib_semantics.c:1259 fib_create_info+0x10b4/0x1e60 net/ipv4/fib_semantics.c:1558 fib_table_insert+0x1a4/0x1574 net/ipv4/fib_trie.c:1236 fib_magic net/ipv4/fib_frontend.c:1104 [inline] fib_add_ifaddr+0xba0/0x122c net/ipv4/fib_frontend.c:1148 fib_netdev_event+0x56c/0x6b0 net/ipv4/fib_frontend.c:1486 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2153 leaked reference. __netdev_tracker_alloc include/linux/netdevice.h:4043 [inline] netdev_hold include/linux/netdevice.h:4072 [inline] fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline] fib_check_nh+0xa84/0x17a4 net/ipv4/fib_semantics.c:1259 fib_create_info+0x10b4/0x1e60 net/ipv4/fib_semantics.c:1558 fib_table_insert+0x1a4/0x1574 net/ipv4/fib_trie.c:1236 fib_magic net/ipv4/fib_frontend.c:1104 [inline] fib_add_ifaddr+0x950/0x122c net/ipv4/fib_frontend.c:1141 fib_netdev_event+0x56c/0x6b0 net/ipv4/fib_frontend.c:1486 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 __dev_notify_flags+0x2ac/0x534 dev_change_flags+0xc8/0x154 net/core/dev.c:8671 do_setlink+0xacc/0x3318 net/core/rtnetlink.c:2830 __rtnl_newlink net/core/rtnetlink.c:3605 [inline] rtnl_newlink+0x1424/0x1b74 net/core/rtnetlink.c:3652 rtnetlink_rcv_msg+0x72c/0xd94 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2493 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1337 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2153