static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt,
			      u32 pmc)
{
	return kvm_pmu_check_pmc(emul_to_vcpu(ctxt), pmc);
}

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.