static u64 tg3_refclk_read(struct tg3 *tp)
{
	u64 stamp = tr32(TG3_EAV_REF_CLCK_LSB);
	return stamp | (u64)tr32(TG3_EAV_REF_CLCK_MSB) << 32;
}

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.