Apple Webkit - 'JSCallbackData' Universal Cross-Site Scripting

globalObject-vm, callback JSC::JSObject callback return mcallback.get; JSDOMGlobalObject globalObject return JSC::jsCastmcallback-globalObject; JSC::JSValue invokeCallbackJSC::MarkedArgumentBuffer& args, CallbackType callbackType, JSC::PropertyName functionName, NakedPtr& returnedException return...