void requeue_futex(struct futex_q *q, struct futex_hash_bucket *hb1,
		   struct futex_hash_bucket *hb2, union futex_key *key2)
{

	/*
	 * If key1 and key2 hash to the same bucket, no need to
	 * requeue.
	 */
	if (likely(&hb1->chain != &hb2->chain)) {
		plist_del(&q->list, &hb1->chain);
		plist_add(&q->list, &hb2->chain);
		q->lock_ptr = &hb2->lock;
#ifdef CONFIG_DEBUG_PI_LIST
		q->list.plist.spinlock = &hb2->lock;
#endif
	}
	get_futex_key_refs(key2);
	q->key = *key2;
}

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.