Actually, I don't see the security problem. If the kernel thinks the MSG_CMSG_COMPAT bit is set, big deal, the user will just get garbage behavior in that the kernel will intepret it's datastructures to be in the compat format instead of native. - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html