unregister_netdevice: waiting for syz_tun to become free. Usage count = 5
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]
 ip6_dst_lookup_tail+0x168/0x1330 net/ipv6/ip6_output.c:1124
 ip6_dst_lookup_flow+0xb8/0x174 net/ipv6/ip6_output.c:1255
 addr6_resolve drivers/infiniband/core/addr.c:433 [inline]
 addr_resolve+0x4f0/0x18e8 drivers/infiniband/core/addr.c:591
 rdma_resolve_ip+0x3a4/0x7a8 drivers/infiniband/core/addr.c:699
 rdma_resolve_addr+0x5a4/0x1bdc drivers/infiniband/core/cma.c:4110
 ucma_resolve_ip+0x26c/0x3f4 drivers/infiniband/core/ucma.c:695
 ucma_write+0x324/0x47c drivers/infiniband/core/ucma.c:1744
 vfs_write+0x2a4/0x91c fs/read_write.c:582
 ksys_write+0x15c/0x26c fs/read_write.c:637
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_dst_lookup_tail+0x1f8/0x1330 net/ipv6/ip6_output.c:1152
 ip6_dst_lookup_flow+0xb8/0x174 net/ipv6/ip6_output.c:1255
 tcp_v6_send_response+0xc60/0x1c60
 tcp_v6_send_reset+0x934/0x1184 net/ipv6/tcp_ipv6.c:1077
 tcp_v6_rcv+0x1bf4/0x23ac net/ipv6/tcp_ipv6.c:1777
 ip6_protocol_deliver_rcu+0x958/0x1214 net/ipv6/ip6_input.c:438
 ip6_input_finish+0x164/0x298 net/ipv6/ip6_input.c:483
 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:302
 ip6_input+0x70/0x84 net/ipv6/ip6_input.c:492
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:8669
 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]
 ipv6_add_dev+0x36c/0xfd0 net/ipv6/addrconf.c:402
 addrconf_notify+0x4fc/0xc94 net/ipv6/addrconf.c:3598
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:1970 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2008 [inline]
 call_netdevice_notifiers+0x138/0x1b8 net/core/dev.c:2022
 register_netdevice+0x117c/0x150c net/core/dev.c:10192
 tun_set_iff+0x630/0xb0c drivers/net/tun.c:2851
 __tun_chr_ioctl+0x79c/0x2b88 drivers/net/tun.c:3114
 tun_chr_ioctl+0x38/0x4c drivers/net/tun.c:3401
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585