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ext4: check allocation failure when duplicating "data" in ext4_remount() 

There is no check for allocation failure when duplicating
"data" in ext4_remount(). Check for failure and return
error -ENOMEM in this case.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
This commit is contained in:
Chengguang Xu 2018-07-29 15:51:54 -04:00 committed by Theodore Ts'o
parent 7f144fd046
commit 21ac738ede
1 changed files with 3 additions and 0 deletions
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3
fs/ext4/super.c
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@ -5101,6 +5101,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
#endif
char *orig_data = kstrdup(data, GFP_KERNEL);
if (data && !orig_data)
return -ENOMEM;
/* Store the original options */
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;