[Webkit-unassigned] [Bug 117465] New: Potential crash in FrameView::updateScrollCorner

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117465

           Summary: Potential crash in FrameView::updateScrollCorner
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: darin at apple.com, ap at webkit.org


We might want to merge https://chromium.googlesource.com/chromium/blink/+/525efd3cc851df1545133547a172ddfdb55b2645
if we can reproduce or has been getting reports for the said crash.

Don't know how to reproduce but it seems the only possibility of crash:

If frameView::updateScrollCorner() is called when the FrameView doesn't have
the document or (body and documentElement), and the owner iframe/frame
element has scrollbar corner style, then |renderer| will be NULL and
it'll crash at line 2736.

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