static int tg3_tso_bug(struct tg3 *tp, struct sk_buff *skb)
{
	struct sk_buff *segs, *nskb;
	u32 frag_cnt_est = skb_shinfo(skb)->gso_segs * 3;

	/* Estimate the number of fragments in the worst case */
	if (unlikely(tg3_tx_avail(&tp->napi[0]) <= frag_cnt_est)) {
		netif_stop_queue(tp->dev);

		/* netif_tx_stop_queue() must be done before checking
		 * checking tx index in tg3_tx_avail() below, because in
		 * tg3_tx(), we update tx index before checking for
		 * netif_tx_queue_stopped().
		 */
		smp_mb();
		if (tg3_tx_avail(&tp->napi[0]) <= frag_cnt_est)
			return NETDEV_TX_BUSY;

		netif_wake_queue(tp->dev);
	}

	segs = skb_gso_segment(skb, tp->dev->features & ~NETIF_F_TSO);
	if (IS_ERR(segs))
		goto tg3_tso_bug_end;

	do {
		nskb = segs;
		segs = segs->next;
		nskb->next = NULL;
		tg3_start_xmit(nskb, tp->dev);
	} while (segs);

tg3_tso_bug_end:
	dev_kfree_skb(skb);

	return NETDEV_TX_OK;
}

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.