unregister_netdevice: waiting for vlan0 to become free. Usage count = 2
leaked reference.
 __netdev_tracker_alloc include/linux/netdevice.h:4070 [inline]
 netdev_tracker_alloc include/linux/netdevice.h:4082 [inline]
 fib6_nh_init+0x5ca/0x1c30 net/ipv6/route.c:3613
 ip6_route_info_create+0x10f3/0x1980 net/ipv6/route.c:3791
 ip6_route_add+0x28/0x150 net/ipv6/route.c:3835
 ipv6_route_ioctl+0x3fc/0x570 net/ipv6/route.c:4459
 inet6_ioctl+0x246/0x290 net/ipv6/af_inet6.c:569
 sock_do_ioctl+0xcc/0x230 net/socket.c:1201
 sock_ioctl+0x1f8/0x680 net/socket.c:1318
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd