static void set_cpu_sd_state_busy(int cpu)
{
	struct sched_domain *sd;

	rcu_read_lock();
	sd = rcu_dereference(per_cpu(sd_llc, cpu));

	if (!sd || !sd->nohz_idle)
		goto unlock;
	sd->nohz_idle = 0;

	atomic_inc(&sd->shared->nr_busy_cpus);
unlock:
	rcu_read_unlock();
}

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.