I can start privileged LXC containers with 4.18 kernel, Only can not start unprivileged LXC containers with 4.18 kernel.
Maybe the problem is lxc, not the kernel, https://lists.linuxfoundation.org/pipermail/containers/2018-June/039174.html -- Key fingerprint: CDB3 6C62 254B C088 1E5D DD32 182C 97DB CF2C 80AC