From: Jan Kiszka jan.kiszka@siemens.com
[ Upstream commit cf64527bb33f6cec2ed50f89182fc4688d0056b6 ]
Letting this pend may cause nested_get_vmcs12_pages to run against an invalid state, corrupting the effective vmcs of L1.
This was triggerable in QEMU after a guest corruption in L2, followed by a L1 reset.
Signed-off-by: Jan Kiszka jan.kiszka@siemens.com Reviewed-by: Liran Alon liran.alon@oracle.com Cc: stable@vger.kernel.org Fixes: 7f7f1ba33cf2 ("KVM: x86: do not load vmcs12 pages while still in SMM") Signed-off-by: Paolo Bonzini pbonzini@redhat.com --- arch/x86/kvm/vmx/nested.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index b72d6aec4e90..df6e26894e25 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -210,6 +210,8 @@ static void free_nested(struct kvm_vcpu *vcpu) if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon) return;
+ kvm_clear_request(KVM_REQ_GET_VMCS12_PAGES, vcpu); + vmx->nested.vmxon = false; vmx->nested.smm.vmxon = false; free_vpid(vmx->nested.vpid02);