static int qeth_core_probe_device(struct ccwgroup_device *gdev)
{
	struct qeth_card *card;
	struct device *dev;
	int rc;
	unsigned long flags;
	char dbf_name[DBF_NAME_LEN];

	QETH_DBF_TEXT(SETUP, 2, "probedev");

	dev = &gdev->dev;
	if (!get_device(dev))
		return -ENODEV;

	QETH_DBF_TEXT_(SETUP, 2, "%s", dev_name(&gdev->dev));

	card = qeth_alloc_card();
	if (!card) {
		QETH_DBF_TEXT_(SETUP, 2, "1err%d", -ENOMEM);
		rc = -ENOMEM;
		goto err_dev;
	}

	snprintf(dbf_name, sizeof(dbf_name), "qeth_card_%s",
		dev_name(&gdev->dev));
	card->debug = qeth_get_dbf_entry(dbf_name);
	if (!card->debug) {
		rc = qeth_add_dbf_entry(card, dbf_name);
		if (rc)
			goto err_card;
	}

	card->read.ccwdev  = gdev->cdev[0];
	card->write.ccwdev = gdev->cdev[1];
	card->data.ccwdev  = gdev->cdev[2];
	dev_set_drvdata(&gdev->dev, card);
	card->gdev = gdev;
	gdev->cdev[0]->handler = qeth_irq;
	gdev->cdev[1]->handler = qeth_irq;
	gdev->cdev[2]->handler = qeth_irq;

	rc = qeth_determine_card_type(card);
	if (rc) {
		QETH_DBF_TEXT_(SETUP, 2, "3err%d", rc);
		goto err_card;
	}
	rc = qeth_setup_card(card);
	if (rc) {
		QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
		goto err_card;
	}

	if (card->info.type == QETH_CARD_TYPE_OSN)
		gdev->dev.type = &qeth_osn_devtype;
	else
		gdev->dev.type = &qeth_generic_devtype;

	switch (card->info.type) {
	case QETH_CARD_TYPE_OSN:
	case QETH_CARD_TYPE_OSM:
		rc = qeth_core_load_discipline(card, QETH_DISCIPLINE_LAYER2);
		if (rc)
			goto err_card;
		rc = card->discipline->setup(card->gdev);
		if (rc)
			goto err_disc;
	case QETH_CARD_TYPE_OSD:
	case QETH_CARD_TYPE_OSX:
	default:
		break;
	}

	write_lock_irqsave(&qeth_core_card_list.rwlock, flags);
	list_add_tail(&card->list, &qeth_core_card_list.list);
	write_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);

	qeth_determine_capabilities(card);
	return 0;

err_disc:
	qeth_core_free_discipline(card);
err_card:
	qeth_core_free_card(card);
err_dev:
	put_device(dev);
	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.