static int nfs_read_req(struct file_priv *priv, uint64_t offset,
		uint32_t readlen)
{
	uint32_t data[1024];
	uint32_t *p;
	int len;
	struct packet *nfs_packet;
	uint32_t rlen, eof;

	/*
	 * struct READ3args {
	 * 	nfs_fh3 file;
	 * 	offset3 offset;
	 * 	count3 count;
	 * };
	 *
	 * struct READ3resok {
	 * 	post_op_attr file_attributes;
	 * 	count3 count;
	 * 	bool eof;
	 * 	opaque data<>;
	 * };
	 *
	 * struct READ3resfail {
	 * 	post_op_attr file_attributes;
	 * };
	 *
	 * union READ3res switch (nfsstat3 status) {
	 * case NFS3_OK:
	 * 	READ3resok resok;
	 * default:
	 * 	READ3resfail resfail;
	 * };
	 */
	p = &(data[0]);
	p = rpc_add_credentials(p);

	p = nfs_add_fh3(p, &priv->fh);
	p = nfs_add_uint64(p, offset);
	p = nfs_add_uint32(p, readlen);

	len = p - &(data[0]);

	nfs_packet = rpc_req(priv->npriv, PROG_NFS, NFSPROC3_READ, data, len);
	if (IS_ERR(nfs_packet))
		return PTR_ERR(nfs_packet);

	p = (void *)nfs_packet->data + sizeof(struct rpc_reply) + 4;

	p = nfs_read_post_op_attr(p, NULL);

	rlen = ntoh32(net_read_uint32(p));

	/* skip over count */
	p += 1;

	eof = ntoh32(net_read_uint32(p));

	/*
	 * skip over eof and count embedded in the representation of data
	 * assuming it equals rlen above.
	 */
	p += 2;

	if (readlen && !rlen && !eof) {
		free(nfs_packet);
		return -EIO;
	}

	kfifo_put(priv->fifo, (char *)p, rlen);

	free(nfs_packet);

	return 0;
}

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.