unregister_netdevice: waiting for syz_tun to become free. Usage count = 5
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4008 [inline]
 netdev_hold include/linux/netdevice.h:4037 [inline]
 dst_init+0xee/0x440 net/core/dst.c:52
 dst_alloc+0x155/0x190 net/core/dst.c:92
 rt_dst_alloc net/ipv4/route.c:1635 [inline]
 __mkroute_output net/ipv4/route.c:2595 [inline]
 ip_route_output_key_hash_rcu+0x1471/0x2380 net/ipv4/route.c:2817
 ip_route_output_key_hash+0x207/0x360 net/ipv4/route.c:2646
 __ip_route_output_key include/net/route.h:137 [inline]
 ip_route_output_flow+0x25/0x130 net/ipv4/route.c:2876
 ip_route_output_key include/net/route.h:153 [inline]
 geneve_link_config+0x1a3/0x640 drivers/net/geneve.c:1634
 geneve_newlink+0x12c/0x1a0 drivers/net/geneve.c:1687
 rtnl_newlink_create net/core/rtnetlink.c:3390 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3610 [inline]
 rtnl_newlink+0x14e3/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6122
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2148
 __do_sys_sendto net/socket.c:2160 [inline]
 __se_sys_sendto net/socket.c:2156 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4008 [inline]
 netdev_hold include/linux/netdevice.h:4037 [inline]
 fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
 fib_check_nh+0xd07/0x1bb0 net/ipv4/fib_semantics.c:1259
 fib_create_info+0x148b/0x2500 net/ipv4/fib_semantics.c:1558
 fib_table_insert+0x1f2/0x1f20 net/ipv4/fib_trie.c:1236
 fib_magic net/ipv4/fib_frontend.c:1104 [inline]
 fib_add_ifaddr+0xf4c/0x1730 net/ipv4/fib_frontend.c:1148
 fib_netdev_event+0x620/0x730 net/ipv4/fib_frontend.c:1486
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:455
 __dev_notify_flags+0x304/0x610
 dev_change_flags+0xe7/0x190 net/core/dev.c:8658
 do_setlink+0xcf4/0x3e30 net/core/rtnetlink.c:2801
 __rtnl_newlink net/core/rtnetlink.c:3576 [inline]
 rtnl_newlink+0x172c/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6122
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2148
 __do_sys_sendto net/socket.c:2160 [inline]
 __se_sys_sendto net/socket.c:2156 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4008 [inline]
 netdev_hold include/linux/netdevice.h:4037 [inline]
 fib_check_nh_nongw net/ipv4/fib_semantics.c:1239 [inline]
 fib_check_nh+0xd07/0x1bb0 net/ipv4/fib_semantics.c:1259
 fib_create_info+0x148b/0x2500 net/ipv4/fib_semantics.c:1558
 fib_table_insert+0x1f2/0x1f20 net/ipv4/fib_trie.c:1236
 fib_magic net/ipv4/fib_frontend.c:1104 [inline]
 fib_add_ifaddr+0xc24/0x1730 net/ipv4/fib_frontend.c:1141
 fib_netdev_event+0x620/0x730 net/ipv4/fib_frontend.c:1486
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:455
 __dev_notify_flags+0x304/0x610
 dev_change_flags+0xe7/0x190 net/core/dev.c:8658
 do_setlink+0xcf4/0x3e30 net/core/rtnetlink.c:2801
 __rtnl_newlink net/core/rtnetlink.c:3576 [inline]
 rtnl_newlink+0x172c/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6122
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2148
 __do_sys_sendto net/socket.c:2160 [inline]
 __se_sys_sendto net/socket.c:2156 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
leaked reference.
 fib_create_info+0x1f98/0x2500 net/ipv4/fib_semantics.c:1552
 fib_table_insert+0x1f2/0x1f20 net/ipv4/fib_trie.c:1236
 fib_magic net/ipv4/fib_frontend.c:1104 [inline]
 fib_add_ifaddr+0x47f/0x1730 net/ipv4/fib_frontend.c:1126
 fib_inetaddr_event+0x12b/0x2b0 net/ipv4/fib_frontend.c:1440
 notifier_call_chain kernel/notifier.c:87 [inline]
 blocking_notifier_call_chain+0x104/0x1b0 kernel/notifier.c:382
 __inet_insert_ifa+0x9cb/0xbd0 net/ipv4/devinet.c:554
 inet_rtm_newaddr+0x8d3/0x18e0 net/ipv4/devinet.c:960
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6122
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2148
 __do_sys_sendto net/socket.c:2160 [inline]
 __se_sys_sendto net/socket.c:2156 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd