static inline void vring_used_write(VirtQueue *vq, VRingUsedElem *uelem,
                                    int i)
{
    hwaddr pa;
    virtio_tswap32s(vq->vdev, &uelem->id);
    virtio_tswap32s(vq->vdev, &uelem->len);
    pa = vq->vring.used + offsetof(VRingUsed, ring[i]);
    address_space_write(&address_space_memory, pa, MEMTXATTRS_UNSPECIFIED,
                       (void *)uelem, sizeof(VRingUsedElem));
}

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.