-#define MS_USERS 0x40000000
-#define MS_OWNER 0x10000000
-#define MS_GROUP 0x08000000
-#define MS_COMMENT 0x02000000
+#define MS_USERS (MS_NOEXEC|MS_NOSUID|MS_NODEV)
+#define MS_OWNER (MS_NOSUID|MS_NODEV)
+#define MS_GROUP (MS_NOSUID|MS_NODEV)
+#define MS_COMMENT 0