static unsigned long kvm_get_guest_ip(void)
{
	unsigned long ip = 0;

	if (percpu_read(current_vcpu))
		ip = kvm_rip_read(percpu_read(current_vcpu));

	return ip;
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.