Index: lib.php
===================================================================
--- lib.php	(revision 3832)
+++ lib.php	(working copy)
@@ -3538,7 +3538,8 @@
 function assignment_get_all_submissions($assignment, $sort="", $dir="DESC") {
 /// Return all assignment submissions by ENROLLED students (even empty)
     global $CFG, $DB;
-
+    
+    
     if ($sort == "lastname" or $sort == "firstname") {
         $sort = "u.$sort $dir";
     } else if (empty($sort)) {
@@ -3552,12 +3553,16 @@
     if ($assignment->course == SITEID) {
         $select = '';
     }*/
-
+    $cmid = $assignment->cm->id;
+    $context = context_module::instance($cmid);
+    list($enroledsql, $params) = get_enrolled_sql($context, 'mod/assignment:view', 0);
+    $params['assignmentid'] = $assignment->id;
     return $DB->get_records_sql("SELECT a.*
-                                   FROM {assignment_submissions} a, {user} u
-                                  WHERE u.id = a.userid
-                                        AND a.assignment = ?
-                               ORDER BY $sort", array($assignment->id));
+                                   FROM {assignment_submissions} a
+                                    INNER JOIN ($enroledsql) u
+                                  WHERE u.id = a.userid ON u.id =s.userid
+                                        AND a.assignment = :assignmentid
+                               ORDER BY $sort", $params);//array($assignment->id));
 
 }