Bug 66297 – Page::PageClients not fully initialized?

• Component: DOM
• Status: RESOLVED FIXED

[Berend-Jan Wever]

Created attachment 104032 [details]
Repro

Repro:
<script>
  new (window.open()).PeerConnection([].x,function(){});
</script>

It seems that a WebViews PageClients structure is not fully initialized; "deviceMotionClient" and "mediaStreamClient" are not set:

WebViewImpl::WebViewImpl(WebViewClient* client)
    : m_client(client)
<<<snip>>>
    Page::PageClients pageClients;
--------------------------------
        struct PageClients {
<<<snip>>>
            ChromeClient* chromeClient;
            ContextMenuClient* contextMenuClient;
            EditorClient* editorClient;
            DragClient* dragClient;
            InspectorClient* inspectorClient;
            GeolocationClient* geolocationClient;
            DeviceMotionClient* deviceMotionClient;
            DeviceOrientationClient* deviceOrientationClient;
            RefPtr<BackForwardList> backForwardClient;
            SpeechInputClient* speechInputClient;
            MediaStreamClient* mediaStreamClient;
        };
--------------------------------
    pageClients.chromeClient = &m_chromeClientImpl;
    pageClients.contextMenuClient = &m_contextMenuClientImpl;
    pageClients.editorClient = &m_editorClientImpl;
    pageClients.dragClient = &m_dragClientImpl;
    pageClients.inspectorClient = &m_inspectorClientImpl;
#if ENABLE(INPUT_SPEECH)
    pageClients.speechInputClient = m_speechInputClient.get();
#endif
    pageClients.deviceOrientationClient = m_deviceOrientationClientProxy.get();
    pageClients.geolocationClient = m_geolocationClientProxy.get();
    pageClients.backForwardClient = BackForwardListChromium::create(this);

    m_page = adoptPtr(new Page(pageClients));
<<<snip>>>

This will cause the corresponding MediaStreamController to have a NULL m_client, which the code does not take into account and can leads to a NULL ptr as show in the repro.

[Berend-Jan Wever]

Chromium: https://code.google.com/p/chromium/issues/detail?id=93046