[Webkit-unassigned] [Bug 31322] New: REGRESSION (4.0.3->TOT): Repro crash saving pcmag.com article as a webarchive

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=31322

           Summary: REGRESSION (4.0.3->TOT): Repro crash saving pcmag.com
                    article as a webarchive
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
               URL: http://www.pcmag.com/article2/0,2817,2354369,00.asp
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Critical
          Priority: P1
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: beidson at apple.com


Go to http://www.pcmag.com/article2/0,2817,2354369,00.asp then save the page as
a webarchive.  Crash!

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                 0x0000000101ba29fc
WTF::RefPtr<WebCore::StyleList>::operator WebCore::StyleList*
WTF::RefPtr<WebCore::StyleList>::*() const + 12 (RefPtr.h:72)
1   com.apple.WebCore                 0x0000000101ba23e3
WebCore::CSSRuleList::length() const + 25 (CSSRuleList.cpp:54)
2   com.apple.WebCore                 0x0000000101bee366
WebCore::CSSStyleSheet::addSubresourceStyleURLs(WTF::ListHashSet<WebCore::KURL,
WebCore::KURLHash>&) + 254 (CSSStyleSheet.cpp:235)
3   com.apple.WebCore                 0x0000000101e72e69
WebCore::HTMLLinkElement::addSubresourceAttributeURLs(WTF::ListHashSet<WebCore::KURL,
WebCore::KURLHash>&) const + 143 (HTMLLinkElement.cpp:424)
4   com.apple.WebCore                 0x00000001021b9152
WebCore::Node::getSubresourceURLs(WTF::ListHashSet<WebCore::KURL,
WebCore::KURLHash>&) const + 42 (Node.cpp:2282)
5   com.apple.WebCore                 0x0000000102172490
WebCore::LegacyWebArchive::create(WebCore::String const&, WebCore::Frame*,
WTF::Vector<WebCore::Node*, 0ul> const&) + 882 (LegacyWebArchive.cpp:516)
6   com.apple.WebCore                 0x00000001021730d1
WebCore::LegacyWebArchive::create(WebCore::Node*) + 315
(LegacyWebArchive.cpp:430)
7   com.apple.WebKit                  0x00000001015828c9
-[DOMNode(WebDOMNodeOperations) webArchive] + 70 (WebDOMOperations.mm:53)
...

We're walking a CSSStyleSheet looking for subresource URLs.  The CSSRuleList we
get is null do to a failed security origin check.  We should just walk the
stylesheet directly.

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