commit e48bb497b95a0f7127f9ff596a6b4c4b206f7dcf
author Avi Kivity <avi@qumranet.com> Sun Mar 23 14:21:08 2008 +0200
committer Avi Kivity <avi@qumranet.com> Tue Mar 25 10:22:17 2008 +0200
tree ed08b92975bdec1e482ee883040148580d3cf8ab
parent 707a18a51d83d9180a63b3cbaad8eda7764a8689

KVM: MMU: Fix memory leak on guest demand faults

While backporting 72dc67a69690288538142df73a7e3ac66fea68dc, a gfn_to_page()
call was duplicated instead of moved (due to an unrelated patch not being
present in mainline).  This caused a page reference leak, resulting in a
fairly massive memory leak.

Fix by removing the extraneous gfn_to_page() call.

Signed-off-by: Avi Kivity <avi@qumranet.com>

arch/x86/kvm/mmu.c

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 4ba85d9..e55af12 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1412,7 +1412,7 @@
 	up_read(&current->mm->mmap_sem);
 
 	vcpu->arch.update_pte.gfn = gfn;
-	vcpu->arch.update_pte.page = gfn_to_page(vcpu->kvm, gfn);
+	vcpu->arch.update_pte.page = page;
 }
 
 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,