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@xxxxxxx> Reviewed-by: Andreas Dilger <adilger@xxxxxxxxx> --- v2: - Modify changelog for easy understading. fs/ext4/super.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 0c4c2201b3aa..f9c3da513cae 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5014,6 +5014,9 @@ 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; -- 2.17.1
