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 (file)
--- 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++) {