static int tg3_nvram_read_using_eeprom(struct tg3 *tp,
					u32 offset, u32 *val)
{
	u32 tmp;
	int i;

	if (offset > EEPROM_ADDR_ADDR_MASK || (offset % 4) != 0)
		return -EINVAL;

	tmp = tr32(GRC_EEPROM_ADDR) & ~(EEPROM_ADDR_ADDR_MASK |
					EEPROM_ADDR_DEVID_MASK |
					EEPROM_ADDR_READ);
	tw32(GRC_EEPROM_ADDR,
	     tmp |
	     (0 << EEPROM_ADDR_DEVID_SHIFT) |
	     ((offset << EEPROM_ADDR_ADDR_SHIFT) &
	      EEPROM_ADDR_ADDR_MASK) |
	     EEPROM_ADDR_READ | EEPROM_ADDR_START);

	for (i = 0; i < 1000; i++) {
		tmp = tr32(GRC_EEPROM_ADDR);

		if (tmp & EEPROM_ADDR_COMPLETE)
			break;
		msleep(1);
	}
	if (!(tmp & EEPROM_ADDR_COMPLETE))
		return -EBUSY;

	tmp = tr32(GRC_EEPROM_DATA);

	/*
	 * The data will always be opposite the native endian
	 * format.  Perform a blind byteswap to compensate.
	 */
	*val = swab32(tmp);

	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.