static inline int tg3_4g_overflow_test(dma_addr_t mapping, int len)
{
	u32 base = (u32) mapping & 0xffffffff;

	return (base > 0xffffdcc0) && (base + len + 8 < base);
}

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.