static int tg3_mem_rx_acquire(struct tg3 *tp)
{
	unsigned int i, limit;

	limit = tp->rxq_cnt;

	/* If RSS is enabled, we need a (dummy) producer ring
	 * set on vector zero.  This is the true hw prodring.
	 */
	if (tg3_flag(tp, ENABLE_RSS))
		limit++;

	for (i = 0; i < limit; i++) {
		struct tg3_napi *tnapi = &tp->napi[i];

		if (tg3_rx_prodring_init(tp, &tnapi->prodring))
			goto err_out;

		/* If multivector RSS is enabled, vector 0
		 * does not handle rx or tx interrupts.
		 * Don't allocate any resources for it.
		 */
		if (!i && tg3_flag(tp, ENABLE_RSS))
			continue;

		tnapi->rx_rcb = dma_alloc_coherent(&tp->pdev->dev,
						   TG3_RX_RCB_RING_BYTES(tp),
						   &tnapi->rx_rcb_mapping,
						   GFP_KERNEL);
		if (!tnapi->rx_rcb)
			goto err_out;

		memset(tnapi->rx_rcb, 0, TG3_RX_RCB_RING_BYTES(tp));
	}

	return 0;

err_out:
	tg3_mem_rx_release(tp);
	return -ENOMEM;
}

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.