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| author | Chao Yu <yuchao0@huawei.com> | 2017-06-23 01:08:22 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-06-23 01:08:22 -0400 |
| commit | 1ea1516fbbab2b30bf98c534ecaacba579a35208 (patch) | |
| tree | 4a17a8c944a67eb2e00ea0fadad1fdeda3e967b4 /fs/ext4/sysfs.c | |
| parent | 4a4956249dac0b9b0027949907bff0cd1a9b57fa (diff) | |
| download | lwn-1ea1516fbbab2b30bf98c534ecaacba579a35208.tar.gz lwn-1ea1516fbbab2b30bf98c534ecaacba579a35208.zip | |
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 <yuchao0@huawei.com>
Signed-off-by: Miao Xie <miaoxie@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/sysfs.c')
| -rw-r--r-- | fs/ext4/sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c index d74dc5f81a04..48c7a7d55ed3 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); |