[Webkit-unassigned] [Bug 34730] New: [Qt] Null QObjects properties cause Segmentation Fault

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=34730

           Summary: [Qt] Null QObjects properties cause Segmentation Fault
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebKit Qt
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bruno.schmidt at gmail.com


Created an attachment (id=48372)
 --> (https://bugs.webkit.org/attachment.cgi?id=48372)
Patch fixing the bug

If an QObject is added to the javascript context and it contains properties of
the type QObject* with NULL value, calling the property causes Segmentation
Fault.
So now the code checks for objects which are null and threat them accordingly:
 * QtInstance::getClass() may return NULL
 * QtInstance::stringValue(ExecState* exec) may return jsNull()
 * QtInstance::booleanValue() may return false.

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