static int tg3_stop_block(struct tg3 *tp, unsigned long ofs, u32 enable_bit, int silent)
{
	unsigned int i;
	u32 val;

	if (tg3_flag(tp, 5705_PLUS)) {
		switch (ofs) {
		case RCVLSC_MODE:
		case DMAC_MODE:
		case MBFREE_MODE:
		case BUFMGR_MODE:
		case MEMARB_MODE:
			/* We can't enable/disable these bits of the
			 * 5705/5750, just say success.
			 */
			return 0;

		default:
			break;
		}
	}

	val = tr32(ofs);
	val &= ~enable_bit;
	tw32_f(ofs, val);

	for (i = 0; i < MAX_WAIT_CNT; i++) {
		udelay(100);
		val = tr32(ofs);
		if ((val & enable_bit) == 0)
			break;
	}

	if (i == MAX_WAIT_CNT && !silent) {
		dev_err(&tp->pdev->dev,
			"tg3_stop_block timed out, ofs=%lx enable_bit=%x\n",
			ofs, enable_bit);
		return -ENODEV;
	}

	return 0;
}

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.