From: Chao Yu <yuchao0@huawei.com>
Date: Thu, 4 Aug 2016 12:13:02 +0000 (+0800)
Subject: f2fs: allow copying file range only in between regular files
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fe8494bfc8c2914fca821d4ae994aef039be5cf1;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

f2fs: allow copying file range only in between regular files

Only if two input files are regular files, we allow copying data in
range of them, otherwise, deny it.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 0e493f63ea41..685e629f768b 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2086,8 +2086,8 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
 	if (unlikely(f2fs_readonly(src->i_sb)))
 		return -EROFS;
 
-	if (S_ISDIR(src->i_mode) || S_ISDIR(dst->i_mode))
-		return -EISDIR;
+	if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
+		return -EINVAL;
 
 	if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
 		return -EOPNOTSUPP;