[Webkit-unassigned] [Bug 60028] New: WebCore::RenderBlock::deleteLineBoxTree ReadAV at NULL (760cd30cf928f45d54f8689f33c505c8)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=60028

           Summary: WebCore::RenderBlock::deleteLineBoxTree ReadAV at NULL
                    (760cd30cf928f45d54f8689f33c505c8)
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: skylined at chromium.org
                CC: eric at webkit.org


Created an attachment (id=92077)
 --> (https://bugs.webkit.org/attachment.cgi?id=92077&action=review)
Repro

Chromium: http://code.google.com/p/chromium/issues/detail?id=74876
Two repros have been found that appear to trigger the same crash:

Repro1:
<canvas><ins><p></p></ins></canvas>
Triggers a crash on linux in older versions of Chrome

Repro2 (attached):
<header style="-webkit-columns:5pc auto"><marquee><legend style="-webkit-column-span:all;">

id:             chrome.dll!WebCore::RenderBlock::deleteLineBoxTree ReadAV at NULL (760cd30cf928f45d54f8689f33c505c8)
description:    Attempt to read from unallocated NULL pointer+0x8 in chrome.dll!WebCore::RenderBlock::deleteLineBoxTree
stack:          chrome.dll!WebCore::RenderBlock::deleteLineBoxTree
                chrome.dll!WebCore::RenderBlock::splitFlow
                chrome.dll!WebCore::RenderBlock::addChildIgnoringAnonymousColumnBlocks
                chrome.dll!WebCore::RenderBlock::addChildIgnoringContinuation
                chrome.dll!WebCore::RenderBlock::addChild
                chrome.dll!WebCore::Node::createRendererIfNeeded
                chrome.dll!WebCore::Element::attach
                chrome.dll!WebCore::HTMLFormControlElement::attach
                chrome.dll!WebCore::HTMLConstructionSite::attach<...>
                chrome.dll!WebCore::HTMLConstructionSite::attachToCurrent
                chrome.dll!WebCore::HTMLConstructionSite::insertHTMLElement
                chrome.dll!WebCore::HTMLTreeBuilder::processStartTagForInBody
                chrome.dll!WebCore::HTMLTreeBuilder::processStartTag
                chrome.dll!WebCore::HTMLTreeBuilder::processToken
                chrome.dll!WebCore::HTMLTreeBuilder::constructTreeFromAtomicToken
                chrome.dll!WebCore::HTMLDocumentParser::pumpTokenizer
                chrome.dll!WebCore::HTMLDocumentParser::pumpTokenizerIfPossible
                chrome.dll!WebCore::HTMLDocumentParser::insert
                chrome.dll!WebCore::Document::write
                chrome.dll!WebCore::V8HTMLDocument::writeCallback
                chrome.dll!v8::internal::HandleApiCallHelper<...>
                chrome.dll!v8::internal::Builtin_HandleApiCall
                chrome.dll!v8::internal::Invoke
                chrome.dll!v8::internal::Execution::Call
                ...

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