static void tg3_hwclock_to_timestamp(struct tg3 *tp, u64 hwclock,
				     struct skb_shared_hwtstamps *timestamp)
{
	memset(timestamp, 0, sizeof(struct skb_shared_hwtstamps));
	timestamp->hwtstamp  = ns_to_ktime((hwclock & TG3_TSTAMP_MASK) +
					   tp->ptp_adjust);
}

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.