static void vop_virtio_del_device(struct vop_vdev *vdev)
{
	struct vop_info *vi = vdev->vi;
	struct vop_device *vpdev = vdev->vpdev;
	int i;
	struct mic_vqconfig *vqconfig;
	struct mic_bootparam *bootparam = vpdev->hw_ops->get_dp(vpdev);

	if (!bootparam)
		goto skip_hot_remove;
	vop_dev_remove(vi, vdev->dc, vpdev);
skip_hot_remove:
	vpdev->hw_ops->free_irq(vpdev, vdev->virtio_cookie, vdev);
	flush_work(&vdev->virtio_bh_work);
	vqconfig = mic_vq_config(vdev->dd);
	for (i = 0; i < vdev->dd->num_vq; i++) {
		struct vop_vringh *vvr = &vdev->vvr[i];

		dma_unmap_single(&vpdev->dev,
				 vvr->buf_da, VOP_INT_DMA_BUF_SIZE,
				 DMA_BIDIRECTIONAL);
		free_pages((unsigned long)vvr->buf,
			   get_order(VOP_INT_DMA_BUF_SIZE));
		vringh_kiov_cleanup(&vvr->riov);
		vringh_kiov_cleanup(&vvr->wiov);
		dma_unmap_single(&vpdev->dev, le64_to_cpu(vqconfig[i].address),
				 vvr->vring.len, DMA_BIDIRECTIONAL);
		free_pages((unsigned long)vvr->vring.va,
			   get_order(vvr->vring.len));
	}
	/*
	 * Order the type update with previous stores. This write barrier
	 * is paired with the corresponding read barrier before the uncached
	 * system memory read of the type, on the card while scanning the
	 * device page.
	 */
	smp_wmb();
	vdev->dd->type = -1;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.