[Webkit-unassigned] [Bug 73273] New: Crash caused by V8Proxy::retrieveFrameForCallingContext() returning 0 in V8DOMWindowCustom::handlePostMessageCallback

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73273

           Summary: Crash caused by
                    V8Proxy::retrieveFrameForCallingContext() returning 0
                    in V8DOMWindowCustom::handlePostMessageCallback
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore JavaScript
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: marshall at chromium.org
                CC: abarth at webkit.org


1. Create a custom V8 binding that executes another V8 function using the frame context.
2. Call that V8 binding from the body onunload event.

In some cases V8Proxy::retrieveFrameForCallingContext() will return 0 causing the following code in retrieveFrameForCallingContext() to crash:

DOMWindow* source = V8Proxy::retrieveFrameForCallingContext()->domWindow();

The 0 result is caused by the "frame->domWindow() == window" check failing in V8Proxy::retrieveFrame() likely due to the context already being detached from the frame.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.