void RenderBox::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState& transformState) const
{
    if (repaintContainer == this)
        return;

    if (RenderView* v = view()) {
        if (v->layoutStateEnabled() && !repaintContainer) {
            LayoutState* layoutState = v->layoutState();
            LayoutSize offset = layoutState->m_paintOffset;
            offset.expand(x(), y());
            if (style()->position() == RelativePosition && layer())
                offset += layer()->relativePositionOffset();
            transformState.move(offset);
            return;
        }
    }

    bool containerSkipped;
    RenderObject* o = container(repaintContainer, &containerSkipped);
    if (!o)
        return;

    bool isFixedPos = style()->position() == FixedPosition;
    bool hasTransform = hasLayer() && layer()->transform();
    if (hasTransform) {
        fixed &= isFixedPos;
    } else
        fixed |= isFixedPos;
    
    LayoutSize containerOffset = offsetFromContainer(o, roundedLayoutPoint(transformState.mappedPoint()));
    
    bool preserve3D = useTransforms && (o->style()->preserves3D() || style()->preserves3D());
    if (useTransforms && shouldUseTransformFromContainer(o)) {
        TransformationMatrix t;
        getTransformFromContainer(o, containerOffset, t);
        transformState.applyTransform(t, preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
    } else
        transformState.move(containerOffset.width(), containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);

    if (containerSkipped) {
        LayoutSize containerOffset = repaintContainer->offsetFromAncestorContainer(o);
        transformState.move(-containerOffset.width(), -containerOffset.height(), preserve3D ? TransformState::AccumulateTransform : TransformState::FlattenTransform);
        return;
    }
    
    o->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
}

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.