void RenderLayerCompositor::ensureRootLayer()
{
    RootLayerAttachment expectedAttachment = isMainFrame() ? RootLayerAttachedViaChromeClient : RootLayerAttachedViaEnclosingFrame;
    if (expectedAttachment == m_rootLayerAttachment)
         return;

    if (!m_rootContentLayer) {
        m_rootContentLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
        IntRect overflowRect = m_renderView->pixelSnappedLayoutOverflowRect();
        m_rootContentLayer->setSize(FloatSize(overflowRect.maxX(), overflowRect.maxY()));
        m_rootContentLayer->setPosition(FloatPoint());

        m_rootContentLayer->setMasksToBounds(true);
    }

    if (!m_overflowControlsHostLayer) {
        ASSERT(!m_scrollLayer);
        ASSERT(!m_containerLayer);

        m_overflowControlsHostLayer = GraphicsLayer::create(graphicsLayerFactory(), this);

        m_containerLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
        bool containerMasksToBounds = !isMainFrame();
        if (Settings* settings = m_renderView->document().settings()) {
            if (settings->mainFrameClipsContent())
                containerMasksToBounds = true;
        }
        m_containerLayer->setMasksToBounds(containerMasksToBounds);

        m_scrollLayer = GraphicsLayer::create(graphicsLayerFactory(), this);
        if (ScrollingCoordinator* scrollingCoordinator = this->scrollingCoordinator())
            scrollingCoordinator->setLayerIsContainerForFixedPositionLayers(m_scrollLayer.get(), true);

        m_overflowControlsHostLayer->addChild(m_containerLayer.get());
        m_containerLayer->addChild(m_scrollLayer.get());
        m_scrollLayer->addChild(m_rootContentLayer.get());

        frameViewDidChangeSize();
        frameViewDidScroll();
    }

    if (m_rootLayerAttachment != RootLayerUnattached)
        detachRootLayer();

    attachRootLayer(expectedAttachment);
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.