[patch]check NULL pointer

Shaohua Li
2011-06-09T03:31:34Z

orig_data could be NULL.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index cc5c157..45fc255 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3057,6 +3057,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO;
ext4_group_t first_not_zeroed;

+ if (!orig_data)
+ return ret;
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
if (!sbi)
goto out_free_orig;
@@ -4285,6 +4287,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
#endif
char *orig_data = kstrdup(data, GFP_KERNEL);

+ if (!orig_data)
+ return -ENOMEM;
/* Store the original options */
lock_super(sb);
old_sb_flags = sb->s_flags;