From 1ea1516fbbab2b30bf98c534ecaacba579a35208 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Fri, 23 Jun 2017 01:08:22 -0400 Subject: [PATCH] ext4: check return value of kstrtoull correctly in reserved_clusters_store kstrtoull returns 0 on success, however, in reserved_clusters_store we will return -EINVAL if kstrtoull returns 0, it makes us fail to update reserved_clusters value through sysfs. Fixes: 76d33bca5581b1dd5c3157fa168db849a784ada4 Cc: stable@vger.kernel.org # 4.4 Signed-off-by: Chao Yu Signed-off-by: Miao Xie Signed-off-by: Theodore Ts'o --- fs/ext4/sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index d74dc5f..48c7a7d 100644 --- a/fs/ext4/sysfs.c +++ b/fs/ext4/sysfs.c @@ -100,7 +100,7 @@ static ssize_t reserved_clusters_store(struct ext4_attr *a, int ret; ret = kstrtoull(skip_spaces(buf), 0, &val); - if (!ret || val >= clusters) + if (ret || val >= clusters) return -EINVAL; atomic64_set(&sbi->s_resv_clusters, val); -- 2.7.4