static inline int qeth_alloc_cq(struct qeth_card *card)
{
	int rc;

	if (card->options.cq == QETH_CQ_ENABLED) {
		int i;
		struct qdio_outbuf_state *outbuf_states;

		QETH_DBF_TEXT(SETUP, 2, "cqon");
		card->qdio.c_q = kzalloc(sizeof(struct qeth_qdio_q),
					 GFP_KERNEL);
		if (!card->qdio.c_q) {
			rc = -1;
			goto kmsg_out;
		}
		QETH_DBF_HEX(SETUP, 2, &card->qdio.c_q, sizeof(void *));

		for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; ++i) {
			card->qdio.c_q->bufs[i].buffer =
				&card->qdio.c_q->qdio_bufs[i];
		}

		card->qdio.no_in_queues = 2;

		card->qdio.out_bufstates =
			kzalloc(card->qdio.no_out_queues *
				QDIO_MAX_BUFFERS_PER_Q *
				sizeof(struct qdio_outbuf_state), GFP_KERNEL);
		outbuf_states = card->qdio.out_bufstates;
		if (outbuf_states == NULL) {
			rc = -1;
			goto free_cq_out;
		}
		for (i = 0; i < card->qdio.no_out_queues; ++i) {
			card->qdio.out_qs[i]->bufstates = outbuf_states;
			outbuf_states += QDIO_MAX_BUFFERS_PER_Q;
		}
	} else {
		QETH_DBF_TEXT(SETUP, 2, "nocq");
		card->qdio.c_q = NULL;
		card->qdio.no_in_queues = 1;
	}
	QETH_DBF_TEXT_(SETUP, 2, "iqc%d", card->qdio.no_in_queues);
	rc = 0;
out:
	return rc;
free_cq_out:
	kfree(card->qdio.c_q);
	card->qdio.c_q = NULL;
kmsg_out:
	dev_err(&card->gdev->dev, "Failed to create completion queue\n");
	goto out;
}

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.