static int rpc_check_reply(struct packet *pkt, int rpc_prog,
			   uint32_t rpc_id, int *nfserr)
{
	uint32_t *data;
	struct rpc_reply rpc;

	*nfserr = 0;

	if (!pkt)
		return -EAGAIN;

	memcpy(&rpc, pkt->data, sizeof(rpc));

	if (ntoh32(rpc.id) != rpc_id) {
		if (rpc_id - ntoh32(rpc.id) == 1)
			/* stale packet, wait a bit longer */
			return 0;

		return -EINVAL;
	}

	if (rpc.rstatus  ||
	    rpc.verifier ||
	    rpc.astatus ) {
		return -EINVAL;
	}

	if (rpc_prog != PROG_NFS)
		return 0;

	data = (uint32_t *)(pkt->data + sizeof(struct rpc_reply));
	*nfserr = ntoh32(net_read_uint32(data));
	*nfserr = -*nfserr;

	debug("%s: state: %d, err %d\n", __func__, nfs_state, *nfserr);

	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.