void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu)
{
	struct kvm_pit *pit = vcpu->kvm->arch.vpit;
	struct kvm *kvm = vcpu->kvm;
	struct kvm_kpit_state *ps;

	if (pit) {
		int inject = 0;
		ps = &pit->pit_state;

		/* Try to inject pending interrupts when
		 * last one has been acked.
		 */
		spin_lock(&ps->inject_lock);
		if (atomic_read(&ps->pit_timer.pending) && ps->irq_ack) {
			ps->irq_ack = 0;
			inject = 1;
		}
		spin_unlock(&ps->inject_lock);
		if (inject)
			__inject_pit_timer_intr(kvm);
	}
}

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.