static int add_recvbuf_small(struct virtnet_info *vi, struct receive_queue *rq,
			     gfp_t gfp)
{
	struct sk_buff *skb;
	struct virtio_net_hdr_mrg_rxbuf *hdr;
	int err;

	skb = __netdev_alloc_skb_ip_align(vi->dev, GOOD_PACKET_LEN, gfp);
	if (unlikely(!skb))
		return -ENOMEM;

	skb_put(skb, GOOD_PACKET_LEN);

	hdr = skb_vnet_hdr(skb);
	sg_init_table(rq->sg, MAX_SKB_FRAGS + 2);
	sg_set_buf(rq->sg, hdr, vi->hdr_len);
	skb_to_sgvec(skb, rq->sg + 1, 0, skb->len);

	err = virtqueue_add_inbuf(rq->vq, rq->sg, 2, skb, gfp);
	if (err < 0)
		dev_kfree_skb(skb);

	return err;
}

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.