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authorWang Xiaojun <wangxiaojun11@huawei.com>2021-07-09 11:34:53 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2021-07-14 02:11:08 +0300
commit5417c98c12f6eeb1252130bcea3b943f5e273be7 (patch)
tree4c0a783d1177d35ed171ed1c9286fa8b1d031847 /fs/f2fs
parent01f6afd0f3ccaa2d5f7fb87e7bd910dc17eef06b (diff)
downloadlinux-5417c98c12f6eeb1252130bcea3b943f5e273be7.tar.xz
f2fs: avoid to create an empty string as the extension_list
When creating a file, we need to set the temperature based on extension_list. If the empty string is a valid extension_list, the is_extension_exist will always returns true, which affects the separation of hot and cold. Signed-off-by: Wang Xiaojun <wangxiaojun11@huawei.com> Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/sysfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 15fe30d3aeb5..b1725620c07d 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -351,7 +351,7 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
set = false;
}
- if (strlen(name) >= F2FS_EXTENSION_LEN)
+ if (!strlen(name) || strlen(name) >= F2FS_EXTENSION_LEN)
return -EINVAL;
down_write(&sbi->sb_lock);