static void tg3_nvram_init(struct tg3 *tp)
{
	if (tg3_flag(tp, IS_SSB_CORE)) {
		/* No NVRAM and EEPROM on the SSB Broadcom GigE core. */
		tg3_flag_clear(tp, NVRAM);
		tg3_flag_clear(tp, NVRAM_BUFFERED);
		tg3_flag_set(tp, NO_NVRAM);
		return;
	}

	tw32_f(GRC_EEPROM_ADDR,
	     (EEPROM_ADDR_FSM_RESET |
	      (EEPROM_DEFAULT_CLOCK_PERIOD <<
	       EEPROM_ADDR_CLKPERD_SHIFT)));

	msleep(1);

	/* Enable seeprom accesses. */
	tw32_f(GRC_LOCAL_CTRL,
	     tr32(GRC_LOCAL_CTRL) | GRC_LCLCTRL_AUTO_SEEPROM);
	udelay(100);

	if (tg3_asic_rev(tp) != ASIC_REV_5700 &&
	    tg3_asic_rev(tp) != ASIC_REV_5701) {
		tg3_flag_set(tp, NVRAM);

		if (tg3_nvram_lock(tp)) {
			netdev_warn(tp->dev,
				    "Cannot get nvram lock, %s failed\n",
				    __func__);
			return;
		}
		tg3_enable_nvram_access(tp);

		tp->nvram_size = 0;

		if (tg3_asic_rev(tp) == ASIC_REV_5752)
			tg3_get_5752_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_5755)
			tg3_get_5755_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_5787 ||
			 tg3_asic_rev(tp) == ASIC_REV_5784 ||
			 tg3_asic_rev(tp) == ASIC_REV_5785)
			tg3_get_5787_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_5761)
			tg3_get_5761_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_5906)
			tg3_get_5906_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_57780 ||
			 tg3_flag(tp, 57765_CLASS))
			tg3_get_57780_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_5717 ||
			 tg3_asic_rev(tp) == ASIC_REV_5719)
			tg3_get_5717_nvram_info(tp);
		else if (tg3_asic_rev(tp) == ASIC_REV_5720 ||
			 tg3_asic_rev(tp) == ASIC_REV_5762)
			tg3_get_5720_nvram_info(tp);
		else
			tg3_get_nvram_info(tp);

		if (tp->nvram_size == 0)
			tg3_get_nvram_size(tp);

		tg3_disable_nvram_access(tp);
		tg3_nvram_unlock(tp);

	} else {
		tg3_flag_clear(tp, NVRAM);
		tg3_flag_clear(tp, NVRAM_BUFFERED);

		tg3_get_eeprom_size(tp);
	}
}

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.