int qeth_qdio_clear_card(struct qeth_card *card, int use_halt)
{
	int rc = 0;

	QETH_CARD_TEXT(card, 3, "qdioclr");
	switch (atomic_cmpxchg(&card->qdio.state, QETH_QDIO_ESTABLISHED,
		QETH_QDIO_CLEANING)) {
	case QETH_QDIO_ESTABLISHED:
		if (card->info.type == QETH_CARD_TYPE_IQD)
			rc = qdio_shutdown(CARD_DDEV(card),
				QDIO_FLAG_CLEANUP_USING_HALT);
		else
			rc = qdio_shutdown(CARD_DDEV(card),
				QDIO_FLAG_CLEANUP_USING_CLEAR);
		if (rc)
			QETH_CARD_TEXT_(card, 3, "1err%d", rc);
		qdio_free(CARD_DDEV(card));
		atomic_set(&card->qdio.state, QETH_QDIO_ALLOCATED);
		break;
	case QETH_QDIO_CLEANING:
		return rc;
	default:
		break;
	}
	rc = qeth_clear_halt_card(card, use_halt);
	if (rc)
		QETH_CARD_TEXT_(card, 3, "2err%d", rc);
	card->state = CARD_STATE_DOWN;
	return rc;
}

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.