[Webkit-unassigned] [Bug 61989] New: WebCore::CSSPrimitiveValue::computeLengthDouble - crash

Thu Jun 2 20:18:33 PDT 2011

https://bugs.webkit.org/show_bug.cgi?id=61989

           Summary: WebCore::CSSPrimitiveValue::computeLengthDouble -
                    crash
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
               URL: http://crbug.com/83633
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: davidbarr at chromium.org
                CC: davidbarr at chromium.org

Minimal repro:
--
<html hidden><title style="top: 1rem;">a</title></html>
--

Null-deref evaluating rootStyle->fontDescription() in WebCore::CSSPrimitiveValue::computeLengthDouble().

When parsing any CSS length with 'rem' as the units within the element style of the title, if the html element is hidden, rootElementStyle is undefined and a null-deref occurs when attempting to derive the font size.

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