unregister_netdevice: waiting for syz_tun to become free. Usage count = 11
ref_tracker: syz_tun@000000004d0be13f has 2/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_hold include/linux/netdevice.h:4310 [inline]
     dst_init+0xbc/0x3ec net/core/dst.c:52
     dst_alloc+0x118/0x168 net/core/dst.c:93
     rt_dst_alloc net/ipv4/route.c:1638 [inline]
     __mkroute_output net/ipv4/route.c:2632 [inline]
     ip_route_output_key_hash_rcu+0x1074/0x1dd8 net/ipv4/route.c:2854
     ip_route_output_key_hash+0x174/0x294 net/ipv4/route.c:2683
     __ip_route_output_key include/net/route.h:169 [inline]
     ip_route_connect include/net/route.h:345 [inline]
     __ip4_datagram_connect+0x664/0xfa4 net/ipv4/datagram.c:49
     udp_connect+0x48/0x1e4 net/ipv4/udp.c:2147
     inet_dgram_connect+0x17c/0x364 net/ipv4/af_inet.c:592
     __sys_connect_file net/socket.c:2045 [inline]
     __sys_connect+0x260/0x294 net/socket.c:2064
     __do_sys_connect net/socket.c:2070 [inline]
     __se_sys_connect net/socket.c:2067 [inline]
     __arm64_sys_connect+0x7c/0x94 net/socket.c:2067
     __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
     do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
     el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
     el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
     el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4293 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:990
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3548
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3814
     ip6_route_add+0x38/0x194 net/ipv6/route.c:3858
     addrconf_prefix_route net/ipv6/addrconf.c:2485 [inline]
     addrconf_add_linklocal+0x4cc/0x8b4 net/ipv6/addrconf.c:3310
     addrconf_addr_gen+0x3d4/0x8f4 net/ipv6/addrconf.c:3439
     addrconf_init_auto_addrs+0x798/0xca0
     addrconf_notify+0x8d0/0xce8 net/ipv6/addrconf.c:3736
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:9249
     do_setlink+0xa54/0x36c0 net/core/rtnetlink.c:3118
     rtnl_changelink net/core/rtnetlink.c:3733 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3885 [inline]
     rtnl_newlink+0x1344/0x1844 net/core/rtnetlink.c:4022
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4293 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:990
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3548
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3814
     addrconf_f6i_alloc+0x2c4/0x5d0 net/ipv6/route.c:4593
     ipv6_add_addr+0x4b4/0xde8 net/ipv6/addrconf.c:1119
     addrconf_add_linklocal+0x2c4/0x8b4 net/ipv6/addrconf.c:3308
     addrconf_addr_gen+0x3d4/0x8f4 net/ipv6/addrconf.c:3439
     addrconf_init_auto_addrs+0x798/0xca0
     addrconf_notify+0x8d0/0xce8 net/ipv6/addrconf.c:3736
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:9249
     do_setlink+0xa54/0x36c0 net/core/rtnetlink.c:3118
     rtnl_changelink net/core/rtnetlink.c:3733 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3885 [inline]
     rtnl_newlink+0x1344/0x1844 net/core/rtnetlink.c:4022
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4293 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:990
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3548
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3814
     ip6_route_add+0x38/0x194 net/ipv6/route.c:3858
     addrconf_add_mroute net/ipv6/addrconf.c:2549 [inline]
     addrconf_add_dev+0x2b8/0x458 net/ipv6/addrconf.c:2567
     addrconf_dev_config net/ipv6/addrconf.c:3475 [inline]
     addrconf_init_auto_addrs+0x70c/0xca0 net/ipv6/addrconf.c:3563
     addrconf_notify+0x8d0/0xce8 net/ipv6/addrconf.c:3736
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:9249
     do_setlink+0xa54/0x36c0 net/core/rtnetlink.c:3118
     rtnl_changelink net/core/rtnetlink.c:3733 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3885 [inline]
     rtnl_newlink+0x1344/0x1844 net/core/rtnetlink.c:4022
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6939

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4293 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:990
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3548
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3814
     ip6_route_add+0x38/0x194 net/ipv6/route.c:3858
     addrconf_prefix_route net/ipv6/addrconf.c:2485 [inline]
     fixup_permanent_addr net/ipv6/addrconf.c:3594 [inline]
     addrconf_permanent_addr+0x670/0xaf0 net/ipv6/addrconf.c:3618
     addrconf_notify+0x7bc/0xce8 net/ipv6/addrconf.c:3690
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:9249
     do_setlink+0xa54/0x36c0 net/core/rtnetlink.c:3118
     rtnl_changelink net/core/rtnetlink.c:3733 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3885 [inline]
     rtnl_newlink+0x1344/0x1844 net/core/rtnetlink.c:4022
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6939
     netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1348

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_hold include/linux/netdevice.h:4310 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1217 [inline]
     fib_check_nh+0xa84/0x17a4 net/ipv4/fib_semantics.c:1237
     fib_create_info+0x11d0/0x1ea4 net/ipv4/fib_semantics.c:1533
     fib_table_insert+0x1a4/0x1570 net/ipv4/fib_trie.c:1231
     fib_magic+0x300/0x4b8 net/ipv4/fib_frontend.c:1112
     fib_add_ifaddr+0x33c/0x4ec net/ipv4/fib_frontend.c:1156
     fib_netdev_event+0x368/0x4ac net/ipv4/fib_frontend.c:1494
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:9249
     do_setlink+0xa54/0x36c0 net/core/rtnetlink.c:3118
     rtnl_changelink net/core/rtnetlink.c:3733 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3885 [inline]
     rtnl_newlink+0x1344/0x1844 net/core/rtnetlink.c:4022
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6939
     netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1348

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_hold include/linux/netdevice.h:4310 [inline]
     fib_check_nh_nongw net/ipv4/fib_semantics.c:1217 [inline]
     fib_check_nh+0xa84/0x17a4 net/ipv4/fib_semantics.c:1237
     fib_create_info+0x11d0/0x1ea4 net/ipv4/fib_semantics.c:1533
     fib_table_insert+0x1a4/0x1570 net/ipv4/fib_trie.c:1231
     fib_magic+0x300/0x4b8 net/ipv4/fib_frontend.c:1112
     fib_add_ifaddr+0x2e4/0x4ec net/ipv4/fib_frontend.c:1149
     fib_netdev_event+0x368/0x4ac net/ipv4/fib_frontend.c:1494
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453
     __dev_notify_flags+0x2c4/0x550
     dev_change_flags+0xd0/0x15c net/core/dev.c:9249
     do_setlink+0xa54/0x36c0 net/core/rtnetlink.c:3118
     rtnl_changelink net/core/rtnetlink.c:3733 [inline]
     __rtnl_newlink net/core/rtnetlink.c:3885 [inline]
     rtnl_newlink+0x1344/0x1844 net/core/rtnetlink.c:4022
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6939
     netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1348

ref_tracker: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_tracker_alloc include/linux/netdevice.h:4293 [inline]
     netdev_get_by_index+0x88/0xe4 net/core/dev.c:990
     fib6_nh_init+0x1ac/0x1c58 net/ipv6/route.c:3548
     ip6_route_info_create+0x790/0xefc net/ipv6/route.c:3814
     addrconf_f6i_alloc+0x2c4/0x5d0 net/ipv6/route.c:4593
     ipv6_add_addr+0x4b4/0xde8 net/ipv6/addrconf.c:1119
     inet6_addr_add+0x34c/0xca4 net/ipv6/addrconf.c:3047
     inet6_rtm_newaddr+0x814/0xc58 net/ipv6/addrconf.c:5054
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6939
     netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1348
     netlink_sendmsg+0x7b4/0xa9c net/netlink/af_netlink.c:1892
     sock_sendmsg_nosec net/socket.c:718 [inline]
     __sock_sendmsg net/socket.c:733 [inline]
     __sys_sendto+0x360/0x4d8 net/socket.c:2187
     __do_sys_sendto net/socket.c:2194 [inline]
     __se_sys_sendto net/socket.c:2190 [inline]
     __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2190
     __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: syz_tun@000000004d0be13f has 1/10 users at
     __netdev_tracker_alloc include/linux/netdevice.h:4281 [inline]
     netdev_tracker_alloc+0x68/0xb4 include/linux/netdevice.h:4293
     fib_create_info+0x138c/0x1ea4 net/ipv4/fib_semantics.c:1527
     fib_table_insert+0x1a4/0x1570 net/ipv4/fib_trie.c:1231
     fib_magic+0x300/0x4b8 net/ipv4/fib_frontend.c:1112
     fib_add_ifaddr+0x118/0x4ec net/ipv4/fib_frontend.c:1134
     fib_inetaddr_event+0x12c/0x200 net/ipv4/fib_frontend.c:1448
     notifier_call_chain+0x1c4/0x550 kernel/notifier.c:85
     blocking_notifier_call_chain+0x70/0xa0 kernel/notifier.c:380
     __inet_insert_ifa+0x93c/0xb38 net/ipv4/devinet.c:575
     inet_rtm_newaddr+0xf94/0x1890 net/ipv4/devinet.c:1010
     rtnetlink_rcv_msg+0x670/0xa9c net/core/rtnetlink.c:6912
     netlink_rcv_skb+0x234/0x408 net/netlink/af_netlink.c:2543
     rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:6939
     netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
     netlink_unicast+0x668/0x8a4 net/netlink/af_netlink.c:1348
     netlink_sendmsg+0x7b4/0xa9c net/netlink/af_netlink.c:1892
     sock_sendmsg_nosec net/socket.c:718 [inline]
     __sock_sendmsg net/socket.c:733 [inline]
     __sys_sendto+0x360/0x4d8 net/socket.c:2187