unregister_netdevice: waiting for syz_tun to become free. Usage count = 4
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4051 [inline]
 netdev_hold include/linux/netdevice.h:4080 [inline]
 dst_init+0xda/0x410 net/core/dst.c:52
 dst_alloc+0x12a/0x160 net/core/dst.c:92
 rt_dst_alloc net/ipv4/route.c:1657 [inline]
 __mkroute_output net/ipv4/route.c:2619 [inline]
 ip_route_output_key_hash_rcu+0x14a1/0x23f0 net/ipv4/route.c:2841
 ip_route_output_key_hash+0x207/0x340 net/ipv4/route.c:2670
 __ip_route_output_key include/net/route.h:137 [inline]
 ip_route_output_flow+0x26/0x150 net/ipv4/route.c:2900
 ip_route_output_key include/net/route.h:153 [inline]
 geneve_get_v4_rt+0x7ce/0xc80 drivers/net/geneve.c:848
 geneve_xmit_skb drivers/net/geneve.c:939 [inline]
 geneve_xmit+0x74f/0x3080 drivers/net/geneve.c:1125
 __netdev_start_xmit include/linux/netdevice.h:4896 [inline]
 netdev_start_xmit include/linux/netdevice.h:4910 [inline]
 xmit_one net/core/dev.c:3670 [inline]
 dev_hard_start_xmit+0x262/0x870 net/core/dev.c:3686
 __dev_queue_xmit+0x1bf1/0x3760 net/core/dev.c:4346
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xda2/0x1590 net/ipv6/ip6_output.c:138
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 ndisc_send_skb+0xbfb/0x1510 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4051 [inline]
 netdev_hold include/linux/netdevice.h:4080 [inline]
 dst_init+0xda/0x410 net/core/dst.c:52
 dst_alloc+0x12a/0x160 net/core/dst.c:92
 rt_dst_alloc net/ipv4/route.c:1657 [inline]
 __mkroute_output net/ipv4/route.c:2619 [inline]
 ip_route_output_key_hash_rcu+0x14a1/0x23f0 net/ipv4/route.c:2841
 ip_route_output_key_hash+0x207/0x340 net/ipv4/route.c:2670
 __ip_route_output_key include/net/route.h:137 [inline]
 ip_route_connect include/net/route.h:324 [inline]
 tcp_v4_connect+0x6d3/0x18d0 net/ipv4/tcp_ipv4.c:243
 __inet_stream_connect+0x298/0xea0 net/ipv4/af_inet.c:668
 tcp_sendmsg_fastopen+0x38f/0x600 net/ipv4/tcp.c:1207
 tcp_sendmsg_locked+0x39a5/0x3f10 net/ipv4/tcp.c:1255
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1490
 smc_sendmsg+0x247/0x470 net/smc/af_smc.c:2700
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x59b/0x970 net/socket.c:2519
 ___sys_sendmsg+0x21c/0x290 net/socket.c:2573
 __sys_sendmsg net/socket.c:2602 [inline]
 __do_sys_sendmsg net/socket.c:2611 [inline]
 __se_sys_sendmsg+0x19e/0x270 net/socket.c:2609
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4051 [inline]
 netdev_hold include/linux/netdevice.h:4080 [inline]
 fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
 fib_check_nh+0xc33/0x18f0 net/ipv4/fib_semantics.c:1259
 fib_create_info+0x1458/0x2490 net/ipv4/fib_semantics.c:1558
 fib_table_insert+0xc3/0x1b50 net/ipv4/fib_trie.c:1217
 fib_magic+0x2c1/0x390 net/ipv4/fib_frontend.c:1118
 fib_add_ifaddr+0x389/0x5e0 net/ipv4/fib_frontend.c:1155
 fib_netdev_event+0x361/0x470 net/ipv4/fib_frontend.c:1500
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455
 call_netdevice_notifiers_extack net/core/dev.c:2039 [inline]
 call_netdevice_notifiers net/core/dev.c:2053 [inline]
 __dev_notify_flags+0x178/0x2d0 net/core/dev.c:-1
 dev_change_flags+0xe3/0x1a0 net/core/dev.c:8714
 do_setlink+0xc31/0x3c40 net/core/rtnetlink.c:2833
 __rtnl_newlink net/core/rtnetlink.c:3608 [inline]
 rtnl_newlink+0x17d6/0x1ff0 net/core/rtnetlink.c:3655
 rtnetlink_rcv_msg+0x79b/0xed0 net/core/rtnetlink.c:6153
 netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2511
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x89e/0xbc0 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x44f/0x5c0 net/socket.c:2153