static inline bool nested_vmx_merge_msr_bitmap(struct kvm_vcpu *vcpu,
					       struct vmcs12 *vmcs12)
{
	int msr;
	struct page *page;
	unsigned long *msr_bitmap;

	if (!nested_cpu_has_virt_x2apic_mode(vmcs12))
		return false;

	page = nested_get_page(vcpu, vmcs12->msr_bitmap);
	if (!page) {
		WARN_ON(1);
		return false;
	}
	msr_bitmap = (unsigned long *)kmap(page);
	if (!msr_bitmap) {
		nested_release_page_clean(page);
		WARN_ON(1);
		return false;
	}

	if (nested_cpu_has_virt_x2apic_mode(vmcs12)) {
		if (nested_cpu_has_apic_reg_virt(vmcs12))
			for (msr = 0x800; msr <= 0x8ff; msr++)
				nested_vmx_disable_intercept_for_msr(
					msr_bitmap,
					vmx_msr_bitmap_nested,
					msr, MSR_TYPE_R);
		/* TPR is allowed */
		nested_vmx_disable_intercept_for_msr(msr_bitmap,
				vmx_msr_bitmap_nested,
				APIC_BASE_MSR + (APIC_TASKPRI >> 4),
				MSR_TYPE_R | MSR_TYPE_W);
		if (nested_cpu_has_vid(vmcs12)) {
			/* EOI and self-IPI are allowed */
			nested_vmx_disable_intercept_for_msr(
				msr_bitmap,
				vmx_msr_bitmap_nested,
				APIC_BASE_MSR + (APIC_EOI >> 4),
				MSR_TYPE_W);
			nested_vmx_disable_intercept_for_msr(
				msr_bitmap,
				vmx_msr_bitmap_nested,
				APIC_BASE_MSR + (APIC_SELF_IPI >> 4),
				MSR_TYPE_W);
		}
	} else {
		/*
		 * Enable reading intercept of all the x2apic
		 * MSRs. We should not rely on vmcs12 to do any
		 * optimizations here, it may have been modified
		 * by L1.
		 */
		for (msr = 0x800; msr <= 0x8ff; msr++)
			__vmx_enable_intercept_for_msr(
				vmx_msr_bitmap_nested,
				msr,
				MSR_TYPE_R);

		__vmx_enable_intercept_for_msr(
				vmx_msr_bitmap_nested,
				APIC_BASE_MSR + (APIC_TASKPRI >> 4),
				MSR_TYPE_W);
		__vmx_enable_intercept_for_msr(
				vmx_msr_bitmap_nested,
				APIC_BASE_MSR + (APIC_EOI >> 4),
				MSR_TYPE_W);
		__vmx_enable_intercept_for_msr(
				vmx_msr_bitmap_nested,
				APIC_BASE_MSR + (APIC_SELF_IPI >> 4),
				MSR_TYPE_W);
	}
	kunmap(page);
	nested_release_page_clean(page);

	return true;
}

This vulnerability category highlights issues in resource management where failures to properly release memory, file handles, or other resources can degrade system performance or enable denial-of-service conditions.