static bool tg3_tx_frag_set(struct tg3_napi *tnapi, u32 *entry, u32 *budget,
			    dma_addr_t map, u32 len, u32 flags,
			    u32 mss, u32 vlan)
{
	struct tg3 *tp = tnapi->tp;
	bool hwbug = false;

	if (tg3_flag(tp, SHORT_DMA_BUG) && len <= 8)
		hwbug = true;

	if (tg3_4g_overflow_test(map, len))
		hwbug = true;

	if (tg3_40bit_overflow_test(tp, map, len))
		hwbug = true;

	if (tp->dma_limit) {
		u32 prvidx = *entry;
		u32 tmp_flag = flags & ~TXD_FLAG_END;
		while (len > tp->dma_limit && *budget) {
			u32 frag_len = tp->dma_limit;
			len -= tp->dma_limit;

			/* Avoid the 8byte DMA problem */
			if (len <= 8) {
				len += tp->dma_limit / 2;
				frag_len = tp->dma_limit / 2;
			}

			tnapi->tx_buffers[*entry].fragmented = true;

			tg3_tx_set_bd(&tnapi->tx_ring[*entry], map,
				      frag_len, tmp_flag, mss, vlan);
			*budget -= 1;
			prvidx = *entry;
			*entry = NEXT_TX(*entry);

			map += frag_len;
		}

		if (len) {
			if (*budget) {
				tg3_tx_set_bd(&tnapi->tx_ring[*entry], map,
					      len, flags, mss, vlan);
				*budget -= 1;
				*entry = NEXT_TX(*entry);
			} else {
				hwbug = true;
				tnapi->tx_buffers[prvidx].fragmented = false;
			}
		}
	} else {
		tg3_tx_set_bd(&tnapi->tx_ring[*entry], map,
			      len, flags, mss, vlan);
		*entry = NEXT_TX(*entry);
	}

	return hwbug;
}

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.