mufs: properly free the allocated path in mufs_mkpath()

source/fs/mufs/path.c

@@ -19,8 +19,7 @@ int mufs_mkpath(struct mufs *fs, const char *path, struct mufs_tree *subtree,
 	struct mufs_stat stat;
 	struct mufs_dirent dirent;
 	struct mufs_tree *tree;
-	char *s;
-	char *name;
+	char *s, *root, *name;
 	size_t len;
 	int ret;
 
@@ -33,17 +32,18 @@ int mufs_mkpath(struct mufs *fs, const char *path, struct mufs_tree *subtree,
 		return 0;
 	}
 
+	root = s;
 	name = strrchr(s, '/');
 	*name++ = '\0';
 
-	if (*s == '\0')
-		s = "/";
+	if (*root == '\0')
+		root = "/";
 
 	if (*name == '\0')
-		return -1;
+		goto err_free_s;
 
-	if (resolve_path(fs, s, &tree, &stat) < 0 || stat.type != MUFS_DIR)
-		return -1;
+	if (resolve_path(fs, root, &tree, &stat) < 0 || stat.type != MUFS_DIR)
+		goto err_free_s;
 
 	memset(&dirent, 0, sizeof dirent);
 
@@ -65,14 +65,20 @@ int mufs_mkpath(struct mufs *fs, const char *path, struct mufs_tree *subtree,
 	if (!is_aligned(tree->file_size, fs->dev->log2_block_size) &&
 		write_dirent(tree, tree->file_size, &dirent) > 0) {
 		mufs_del_tree(tree);
+		free(s);
 		return 0;
 	}
 
 	ret = write_dirent(tree, align_up(tree->file_size,
 		fs->dev->log2_block_size), &dirent);
 	mufs_del_tree(tree);
+	free(s);
 
 	return ret;
+
+err_free_s:
+	free(s);
+	return -1;
 }
 
 static int remove_page(struct mufs_tree *tree, uint32_t va)