s3: Fix reading beyond the end of a named stream in xattr_streams

This was found thanks to a test by Sivani from Microsoft against Samba at the
SDC plugfest
(cherry picked from commit 444a05c28df693a745809fef73ae583a78be7c8f)

Fix bug #6731.

diff --git a/source3/modules/vfs_streams_xattr.c b/source3/modules/vfs_streams_xattr.c
index 3d5478d7a259a3ff3a864a4a98d916b85b2fb5fd..c5a7c697da263c4d9df082bc43558b6633bc66a7 100644 (file)
--- a/source3/modules/vfs_streams_xattr.c
+++ b/source3/modules/vfs_streams_xattr.c
@@ -867,8 +867,7 @@ static ssize_t streams_xattr_pread(vfs_handle_struct *handle,
 
         /* Attempt to read past EOF. */
         if (length <= offset) {
-                errno = EINVAL;
-                return -1;
+                return 0;
         }
 
         overlap = (offset + n) > length ? (length - offset) : n;