static void tg3_rx_prodring_free(struct tg3 *tp,
				 struct tg3_rx_prodring_set *tpr)
{
	int i;

	if (tpr != &tp->napi[0].prodring) {
		for (i = tpr->rx_std_cons_idx; i != tpr->rx_std_prod_idx;
		     i = (i + 1) & tp->rx_std_ring_mask)
			tg3_rx_data_free(tp, &tpr->rx_std_buffers[i],
					tp->rx_pkt_map_sz);

		if (tg3_flag(tp, JUMBO_CAPABLE)) {
			for (i = tpr->rx_jmb_cons_idx;
			     i != tpr->rx_jmb_prod_idx;
			     i = (i + 1) & tp->rx_jmb_ring_mask) {
				tg3_rx_data_free(tp, &tpr->rx_jmb_buffers[i],
						TG3_RX_JMB_MAP_SZ);
			}
		}

		return;
	}

	for (i = 0; i <= tp->rx_std_ring_mask; i++)
		tg3_rx_data_free(tp, &tpr->rx_std_buffers[i],
				tp->rx_pkt_map_sz);

	if (tg3_flag(tp, JUMBO_CAPABLE) && !tg3_flag(tp, 5780_CLASS)) {
		for (i = 0; i <= tp->rx_jmb_ring_mask; i++)
			tg3_rx_data_free(tp, &tpr->rx_jmb_buffers[i],
					TG3_RX_JMB_MAP_SZ);
	}
}

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.