static int tg3_poll_msix(struct napi_struct *napi, int budget)
{
	struct tg3_napi *tnapi = container_of(napi, struct tg3_napi, napi);
	struct tg3 *tp = tnapi->tp;
	int work_done = 0;
	struct tg3_hw_status *sblk = tnapi->hw_status;

	while (1) {
		work_done = tg3_poll_work(tnapi, work_done, budget);

		if (unlikely(tg3_flag(tp, TX_RECOVERY_PENDING)))
			goto tx_recovery;

		if (unlikely(work_done >= budget))
			break;

		/* tp->last_tag is used in tg3_int_reenable() below
		 * to tell the hw how much work has been processed,
		 * so we must read it before checking for more work.
		 */
		tnapi->last_tag = sblk->status_tag;
		tnapi->last_irq_tag = tnapi->last_tag;
		rmb();

		/* check for RX/TX work to do */
		if (likely(sblk->idx[0].tx_consumer == tnapi->tx_cons &&
			   *(tnapi->rx_rcb_prod_idx) == tnapi->rx_rcb_ptr)) {

			/* This test here is not race free, but will reduce
			 * the number of interrupts by looping again.
			 */
			if (tnapi == &tp->napi[1] && tp->rx_refill)
				continue;

			napi_complete(napi);
			/* Reenable interrupts. */
			tw32_mailbox(tnapi->int_mbox, tnapi->last_tag << 24);

			/* This test here is synchronized by napi_schedule()
			 * and napi_complete() to close the race condition.
			 */
			if (unlikely(tnapi == &tp->napi[1] && tp->rx_refill)) {
				tw32(HOSTCC_MODE, tp->coalesce_mode |
						  HOSTCC_MODE_ENABLE |
						  tnapi->coal_now);
			}
			mmiowb();
			break;
		}
	}

	return work_done;

tx_recovery:
	/* work_done is guaranteed to be less than budget. */
	napi_complete(napi);
	tg3_reset_task_schedule(tp);
	return work_done;
}

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.