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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/165826">165826</a></dd>
<dt>Author</dt> <dd>reni@webkit.org</dd>
<dt>Date</dt> <dd>2014-03-18 11:57:45 -0700 (Tue, 18 Mar 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Bad cast with toRenderBox in WebCore::RenderView::repaintViewRectangle
https://bugs.webkit.org/show_bug.cgi?id=129104
Reviewed by Simon Fraser.
Source/WebCore:
We should not cast the renderer of a RenderView's owner to RenderBox
unless we are sure it is one.
Test: plugins/crash-invalid-data-reference.html
* rendering/RenderView.cpp:
(WebCore::RenderView::repaintViewRectangle):
LayoutTests:
* plugins/crash-invalid-data-reference-expected.txt: Added.
* plugins/crash-invalid-data-reference.html: Added.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorerenderingRenderViewcpp">trunk/Source/WebCore/rendering/RenderView.cpp</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestspluginscrashinvaliddatareferenceexpectedtxt">trunk/LayoutTests/plugins/crash-invalid-data-reference-expected.txt</a></li>
<li><a href="#trunkLayoutTestspluginscrashinvaliddatareferencehtml">trunk/LayoutTests/plugins/crash-invalid-data-reference.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (165825 => 165826)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog 2014-03-18 18:30:45 UTC (rev 165825)
+++ trunk/LayoutTests/ChangeLog 2014-03-18 18:57:45 UTC (rev 165826)
</span><span class="lines">@@ -1,3 +1,13 @@
</span><ins>+2014-03-18 Renata Hodovan <rhodovan.u-szeged@partner.samsung.com>
+
+ Bad cast with toRenderBox in WebCore::RenderView::repaintViewRectangle
+ https://bugs.webkit.org/show_bug.cgi?id=129104
+
+ Reviewed by Simon Fraser.
+
+ * plugins/crash-invalid-data-reference-expected.txt: Added.
+ * plugins/crash-invalid-data-reference.html: Added.
+
</ins><span class="cx"> 2014-03-18 Antti Koivisto <antti@apple.com>
</span><span class="cx">
</span><span class="cx"> Mutating rules returned by getMatchedCSSRules can result in crash
</span></span></pre></div>
<a id="trunkLayoutTestspluginscrashinvaliddatareferenceexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/plugins/crash-invalid-data-reference-expected.txt (0 => 165826)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/plugins/crash-invalid-data-reference-expected.txt (rev 0)
+++ trunk/LayoutTests/plugins/crash-invalid-data-reference-expected.txt 2014-03-18 18:57:45 UTC (rev 165826)
</span><span class="lines">@@ -0,0 +1 @@
</span><ins>+This test passes if it doesn't crash in debug. (Bug #129104)
</ins></span></pre></div>
<a id="trunkLayoutTestspluginscrashinvaliddatareferencehtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/plugins/crash-invalid-data-reference.html (0 => 165826)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/plugins/crash-invalid-data-reference.html (rev 0)
+++ trunk/LayoutTests/plugins/crash-invalid-data-reference.html 2014-03-18 18:57:45 UTC (rev 165826)
</span><span class="lines">@@ -0,0 +1,14 @@
</span><ins>+<html>
+<head>
+<script>
+ if (window.testRunner)
+ testRunner.dumpAsText();
+</script>
+</head>
+<body>
+ <object data="file://var/www/foo"></object>
+ <div>
+ This test passes if it doesn't crash in debug. (Bug #129104)
+ </div>
+</body>
+</html>
</ins><span class="cx">\ No newline at end of file
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (165825 => 165826)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2014-03-18 18:30:45 UTC (rev 165825)
+++ trunk/Source/WebCore/ChangeLog 2014-03-18 18:57:45 UTC (rev 165826)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2014-03-18 Renata Hodovan <rhodovan.u-szeged@partner.samsung.com>
+
+ Bad cast with toRenderBox in WebCore::RenderView::repaintViewRectangle
+ https://bugs.webkit.org/show_bug.cgi?id=129104
+
+ Reviewed by Simon Fraser.
+
+ We should not cast the renderer of a RenderView's owner to RenderBox
+ unless we are sure it is one.
+
+ Test: plugins/crash-invalid-data-reference.html
+
+ * rendering/RenderView.cpp:
+ (WebCore::RenderView::repaintViewRectangle):
+
</ins><span class="cx"> 2014-03-18 Andreas Kling <akling@apple.com>
</span><span class="cx">
</span><span class="cx"> Micro-optimize element descendant iterator.
</span></span></pre></div>
<a id="trunkSourceWebCorerenderingRenderViewcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/rendering/RenderView.cpp (165825 => 165826)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/rendering/RenderView.cpp 2014-03-18 18:30:45 UTC (rev 165825)
+++ trunk/Source/WebCore/rendering/RenderView.cpp 2014-03-18 18:57:45 UTC (rev 165826)
</span><span class="lines">@@ -545,9 +545,9 @@
</span><span class="cx"> return;
</span><span class="cx">
</span><span class="cx"> if (auto ownerElement = document().ownerElement()) {
</span><del>- if (!ownerElement->renderer())
</del><ins>+ RenderBox* ownerBox = ownerElement->renderBox();
+ if (!ownerBox)
</ins><span class="cx"> return;
</span><del>- auto& ownerBox = toRenderBox(*ownerElement->renderer());
</del><span class="cx"> LayoutRect viewRect = this->viewRect();
</span><span class="cx"> #if PLATFORM(IOS)
</span><span class="cx"> // Don't clip using the visible rect since clipping is handled at a higher level on iPhone.
</span><span class="lines">@@ -556,8 +556,8 @@
</span><span class="cx"> LayoutRect adjustedRect = intersection(repaintRect, viewRect);
</span><span class="cx"> #endif
</span><span class="cx"> adjustedRect.moveBy(-viewRect.location());
</span><del>- adjustedRect.moveBy(ownerBox.contentBoxRect().location());
- ownerBox.repaintRectangle(adjustedRect);
</del><ins>+ adjustedRect.moveBy(ownerBox->contentBoxRect().location());
+ ownerBox->repaintRectangle(adjustedRect);
</ins><span class="cx"> return;
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre>
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