From: Chao Yu <yuchao0@huawei.com>
Date: Mon, 23 Apr 2018 06:01:45 +0000 (+0800)
Subject: fsck.f2fs: fix to avoid accessing invalid memory address
X-Git-Tag: v1.12.0~51
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6466b7578a7528ded8bfcf7819c8f9d3b1cce3d0;p=platform%2Fupstream%2Ff2fs-tools.git

fsck.f2fs: fix to avoid accessing invalid memory address

This patch adds to check return value of calloc in write_superblock().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fsck/mount.c b/fsck/mount.c
index 2ad78d1..0e67a6b 100644
--- a/fsck/mount.c
+++ b/fsck/mount.c
@@ -2234,6 +2234,7 @@ void write_superblock(struct f2fs_super_block *new_sb)
 	u_int8_t *buf;
 
 	buf = calloc(BLOCK_SZ, 1);
+	ASSERT(buf);
 
 	memcpy(buf + F2FS_SUPER_OFFSET, new_sb, sizeof(*new_sb));
 	for (index = 0; index < 2; index++) {