unregister_netdevice: waiting for syzkaller1 to become free. Usage count = 2
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+0x5b8/0x930 net/ipv6/addrconf.c:3380
 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
 devinet_ioctl+0x860/0x17d4 net/ipv4/devinet.c:1157
 inet_ioctl+0x2ac/0x4d8 net/ipv4/af_inet.c:1008
 packet_ioctl+0x1e0/0x3fc net/packet/af_packet.c:4302
 sock_do_ioctl+0x134/0x2dc net/socket.c:1204
 sock_ioctl+0x4ec/0x858 net/socket.c:1321