ProcRenderSetPictureTransform (ClientPtr client)
{
    REQUEST(xRenderSetPictureTransformReq);
    PicturePtr	pPicture;

    REQUEST_SIZE_MATCH(xRenderSetPictureTransformReq);
    VERIFY_PICTURE (pPicture, stuff->picture, client, DixSetAttrAccess);
    return SetPictureTransform (pPicture, (PictTransform *) &stuff->transform);
}

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.