static int tg3_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
			 u32 *rules __always_unused)
{
	struct tg3 *tp = netdev_priv(dev);

	if (!tg3_flag(tp, SUPPORT_MSIX))
		return -EOPNOTSUPP;

	switch (info->cmd) {
	case ETHTOOL_GRXRINGS:
		if (netif_running(tp->dev))
			info->data = tp->rxq_cnt;
		else {
			info->data = num_online_cpus();
			if (info->data > TG3_RSS_MAX_NUM_QS)
				info->data = TG3_RSS_MAX_NUM_QS;
		}

		/* The first interrupt vector only
		 * handles link interrupts.
		 */
		info->data -= 1;
		return 0;

	default:
		return -EOPNOTSUPP;
	}
}

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.