static void tg3_get_eeprom_size(struct tg3 *tp)
{
	u32 cursize, val, magic;

	tp->nvram_size = EEPROM_CHIP_SIZE;

	if (tg3_nvram_read(tp, 0, &magic) != 0)
		return;

	if ((magic != TG3_EEPROM_MAGIC) &&
	    ((magic & TG3_EEPROM_MAGIC_FW_MSK) != TG3_EEPROM_MAGIC_FW) &&
	    ((magic & TG3_EEPROM_MAGIC_HW_MSK) != TG3_EEPROM_MAGIC_HW))
		return;

	/*
	 * Size the chip by reading offsets at increasing powers of two.
	 * When we encounter our validation signature, we know the addressing
	 * has wrapped around, and thus have our chip size.
	 */
	cursize = 0x10;

	while (cursize < tp->nvram_size) {
		if (tg3_nvram_read(tp, cursize, &val) != 0)
			return;

		if (val == magic)
			break;

		cursize <<= 1;
	}

	tp->nvram_size = cursize;
}

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.