[kvm-devel] [PATCH] Don't leak EPT identity page table

[Anthony L. <ali...@us...>]

In vmx.c:alloc_identity_pagetable() we grab a reference to the EPT identity
page table via gfn_to_page().  We never release this reference though.

This patch releases the reference to this page on VM destruction.  I haven't
tested this with EPT.

Signed-off-by: Anthony Liguori <ali...@us...>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 578a0c1..63f46cf 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3909,6 +3909,8 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 	kvm_free_physmem(kvm);
 	if (kvm->arch.apic_access_page)
 		put_page(kvm->arch.apic_access_page);
+	if (kvm->arch.ept_identity_pagetable)
+		put_page(kvm->arch.ept_identity_pagetable);
 	kfree(kvm);
 }