Validate MessageHeader before using

mojo/public/cpp/bindings/lib/connector.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/public/cpp/bindings/lib/connector.h"
 
 #include <assert.h>
 #include <stdlib.h>
 
 #include "mojo/public/cpp/bindings/error_handler.h"
@@ skipping 96 matching lines @@
                                       MOJO_WAIT_FLAG_READABLE,
                                       MOJO_DEADLINE_INDEFINITE,
                                       &Connector::CallOnHandleReady,
                                       this);
 }
 
 void Connector::ReadMore() {
   while (true) {
     MojoResult rv;
 
-    rv = ReadAndDispatchMessage(message_pipe_.get(), incoming_receiver_, NULL);
+    bool receiver_result;
+    rv = ReadAndDispatchMessage(message_pipe_.get(), incoming_receiver_,
+                                &receiver_result);
     if (rv == MOJO_RESULT_SHOULD_WAIT) {
       WaitToReadMore();
       break;
     }
-    if (rv != MOJO_RESULT_OK) {
+    if (rv != MOJO_RESULT_OK || !receiver_result) {
       error_ = true;
       break;
     }
   }
 }
 
 }  // namespace internal
 }  // namespace mojo