storage: src cannot be truncated

src/lxc/storage/storage_utils.c

@@ -89,14 +89,8 @@ char *dir_new_path(char *src, const char *oldname, const char *name,
 	}
 
 	while ((p2 = strstr(src, oldname)) != NULL) {
-		size_t retlen;
-
 		/* copy text up to oldname */
-		retlen = strlcpy(p, src, p2 - src);
-		if (retlen >= p2 - src) {
-			free(ret);
-			return NULL;
-		}
+		strncpy(p, src, p2 - src);
 
 		/* move target pointer (p) */
 		p += p2 - src;