From e3e9ed3d2c443fd90a04fb7ff231ad53ef087417 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 6 Apr 2011 12:30:03 +0200 Subject: [PATCH] KVM: SVM: Fix fault-rip on vmsave/vmload emulation When the emulation of vmload or vmsave fails because the guest passed an unsupported physical address it gets an #GP with rip pointing to the instruction after vmsave/vmload. This is a bug and fixed by this patch. Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity --- arch/x86/kvm/svm.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index a9887376..a6bf2ad 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -2518,13 +2518,13 @@ static int vmload_interception(struct vcpu_svm *svm) if (nested_svm_check_permissions(svm)) return 1; - svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; - skip_emulated_instruction(&svm->vcpu); - nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); if (!nested_vmcb) return 1; + svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; + skip_emulated_instruction(&svm->vcpu); + nested_svm_vmloadsave(nested_vmcb, svm->vmcb); nested_svm_unmap(page); @@ -2539,13 +2539,13 @@ static int vmsave_interception(struct vcpu_svm *svm) if (nested_svm_check_permissions(svm)) return 1; - svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; - skip_emulated_instruction(&svm->vcpu); - nested_vmcb = nested_svm_map(svm, svm->vmcb->save.rax, &page); if (!nested_vmcb) return 1; + svm->next_rip = kvm_rip_read(&svm->vcpu) + 3; + skip_emulated_instruction(&svm->vcpu); + nested_svm_vmloadsave(svm->vmcb, nested_vmcb); nested_svm_unmap(page); -- 2.7.4