static void qeth_update_from_chp_desc(struct qeth_card *card)
{
	struct ccw_device *ccwdev;
	struct channelPath_dsc {
		u8 flags;
		u8 lsn;
		u8 desc;
		u8 chpid;
		u8 swla;
		u8 zeroes;
		u8 chla;
		u8 chpp;
	} *chp_dsc;

	QETH_DBF_TEXT(SETUP, 2, "chp_desc");

	ccwdev = card->data.ccwdev;
	chp_dsc = ccw_device_get_chp_desc(ccwdev, 0);
	if (!chp_dsc)
		goto out;

	card->info.func_level = 0x4100 + chp_dsc->desc;
	if (card->info.type == QETH_CARD_TYPE_IQD)
		goto out;

	/* CHPP field bit 6 == 1 -> single queue */
	if ((chp_dsc->chpp & 0x02) == 0x02)
		qeth_set_single_write_queues(card);
	else
		qeth_set_multiple_write_queues(card);
out:
	kfree(chp_dsc);
	QETH_DBF_TEXT_(SETUP, 2, "nr:%x", card->qdio.no_out_queues);
	QETH_DBF_TEXT_(SETUP, 2, "lvl:%02x", card->info.func_level);
}

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.