static inline u32 tg3_set_function_status(struct tg3 *tp, u32 newstat)
{
	u32 status, shift;

	if (tg3_asic_rev(tp) == ASIC_REV_5717 ||
	    tg3_asic_rev(tp) == ASIC_REV_5719)
		status = tg3_ape_read32(tp, TG3_APE_GPIO_MSG);
	else
		status = tr32(TG3_CPMU_DRV_STATUS);

	shift = TG3_APE_GPIO_MSG_SHIFT + 4 * tp->pci_fn;
	status &= ~(TG3_GPIO_MSG_MASK << shift);
	status |= (newstat << shift);

	if (tg3_asic_rev(tp) == ASIC_REV_5717 ||
	    tg3_asic_rev(tp) == ASIC_REV_5719)
		tg3_ape_write32(tp, TG3_APE_GPIO_MSG, status);
	else
		tw32(TG3_CPMU_DRV_STATUS, status);

	return status >> TG3_APE_GPIO_MSG_SHIFT;
}

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.