KVM: nVMX: Set cached_vmcs12 and cached_shadow_vmcs12 NULL after free (c6bf2ae9) · Commits · 戴 / test

Shall help finding use-after-free bugs earlier. Suggested-by:

arch/x86/kvm/vmx/nested.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -234,7 +234,9 @@ static void free_nested(struct kvm_vcpu *vcpu)
		vmx->vmcs01.shadow_vmcs = NULL;
		}
		kfree(vmx->nested.cached_vmcs12);
		vmx->nested.cached_vmcs12 = NULL;
		kfree(vmx->nested.cached_shadow_vmcs12);
		vmx->nested.cached_shadow_vmcs12 = NULL;
		/* Unpin physical memory we referred to in the vmcs02 */
		if (vmx->nested.apic_access_page) {
		kvm_release_page_dirty(vmx->nested.apic_access_page);