[Webkit-unassigned] [Bug 122277] Missing NULL check at destruct API of VectorDestructor

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=122277


Byungseon Shin <sun.shin at lge.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Platform|Other                       |All




--- Comment #8 from Byungseon Shin <sun.shin at lge.com>  2013-10-03 18:16:10 PST ---
@andersca, I agree with your idea.
Here are some info which I got it from Valgrind.

==7097== Invalid read of size 4
==7097==    at 0x4CD8704: WebCore::DocumentStyleSheetCollection::updateActiveStyleSheets(WebCore::DocumentStyleSheetCollection::UpdateFlag) (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x57B72B5: WebCore::Document::styleResolverChanged(WebCore::StyleResolverUpdateFlag) (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x57B73BF: WebCore::Document::didRemoveAllPendingStylesheet() (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x5635ADD: WebCore::HTMLLinkElement::sheetLoaded() (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4CCF9CB: WebCore::StyleSheetContents::checkLoaded() (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x564ACF5: WebCore::HTMLLinkElement::setCSSStyleSheet(WTF::String const&, WebCore::KURL const&, WTF::String const&, WebCore::CachedCSSStyleSheet const*) (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4D5DBF3: WebCore::CachedCSSStyleSheet::checkNotify() (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4D5D8D3: WebCore::CachedCSSStyleSheet::finishLoading(WebCore::ResourceBuffer*) (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4D9FB73: WebCore::SubresourceLoader::didFinishLoading(double) (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4D98EDB: WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle*, double) (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4EED8FF: WebCore::QNetworkReplyHandler::finish() (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==    by 0x4EED71F: WebCore::QNetworkReplyHandlerCallQueue::flush() (in /usr/lib/libQt5WebKit.so.5.0.0)
==7097==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==7097==

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