[Webkit-unassigned] [Bug 205128] use-after-free READ @ WebCore::EventHandler::focusDocumentView

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=205128

Jack <shihchieh_lee at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rniwa at webkit.org,
                   |                            |zalan at apple.com

--- Comment #1 from Jack <shihchieh_lee at apple.com> ---
The root cause is a race condition between two threads:
1. WebCore::jsDOMWindowInstanceFunctionFocus -> WebCore::DOMWindow::focus -> FocusController::setFocusedFrame, which would reference DOMWindow->frame() 
2. HTMLTableElement::deleteCaption -> WidgetHierarchyUpdatesSuspensionScope::moveWidgets, which would free DOMWindow->frame()

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