X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=fs%2Fremap_range.c;h=77dba3a49e658aa9c9484b9938cc3b81ac2de05f;hb=e2ae634014d3a8839a99f8897b3f6346a133a33b;hp=e6099beefa97d6541e53177dcac22db6391de97b;hpb=643e69aff89a2d0abc53979acc441b68ce86139b;p=linux-2.6-microblaze.git

diff --git a/fs/remap_range.c b/fs/remap_range.c
index e6099beefa97..77dba3a49e65 100644
--- a/fs/remap_range.c
+++ b/fs/remap_range.c
@@ -456,8 +456,16 @@ loff_t vfs_dedupe_file_range_one(struct file *src_file, loff_t src_pos,
 	if (ret)
 		return ret;
 
+	/*
+	 * This is redundant if called from vfs_dedupe_file_range(), but other
+	 * callers need it and it's not performance sesitive...
+	 */
+	ret = remap_verify_area(src_file, src_pos, len, false);
+	if (ret)
+		goto out_drop_write;
+
 	ret = remap_verify_area(dst_file, dst_pos, len, true);
-	if (ret < 0)
+	if (ret)
 		goto out_drop_write;
 
 	ret = -EPERM;