static inline void hb_waiters_inc(struct futex_hash_bucket *hb)
{
#ifdef CONFIG_SMP
	atomic_inc(&hb->waiters);
	/*
	 * Full barrier (A), see the ordering comment above.
	 */
	smp_mb__after_atomic_inc();
#endif
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.