From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Tue, 2 Oct 2018 04:58:00 +0000 (+0200)
Subject: fs: fat: memory leak in fat_unlink()
X-Git-Tag: v2018.11-rc2~51
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=0d532e911cb7e67e151153289024183bc4f5b257;p=oweals%2Fu-boot.git

fs: fat: memory leak in fat_unlink()

Do not leak filename_copy in case of error.
Catch out of memory when calling strdup.

Reported-by: Coverity (CID: 184086)
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---

diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index fc211e74bc..1ec72d156b 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -1259,6 +1259,11 @@ int fat_unlink(const char *filename)
 	char *filename_copy, *dirname, *basename;
 
 	filename_copy = strdup(filename);
+	if (!filename_copy) {
+		printf("Error: allocating memory\n");
+		ret = -ENOMEM;
+		goto exit;
+	}
 	split_filename(filename_copy, &dirname, &basename);
 
 	if (!strcmp(dirname, "/") && !strcmp(basename, "")) {
@@ -1270,7 +1275,8 @@ int fat_unlink(const char *filename)
 	itr = malloc_cache_aligned(sizeof(fat_itr));
 	if (!itr) {
 		printf("Error: allocating memory\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto exit;
 	}
 
 	ret = fat_itr_root(itr, &fsdata);