The patch below does not apply to the 5.5-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From a4d956b9390418623ae5d07933e2679c68b6f83c Mon Sep 17 00:00:00 2001
From: Miaohe Lin linmiaohe@huawei.com Date: Sat, 28 Dec 2019 14:25:24 +0800 Subject: [PATCH] KVM: nVMX: vmread should not set rflags to specify success in case of #PF
In case writing to vmread destination operand result in a #PF, vmread should not call nested_vmx_succeed() to set rflags to specify success. Similar to as done in VMPTRST (See handle_vmptrst()).
Reviewed-by: Liran Alon liran.alon@oracle.com Signed-off-by: Miaohe Lin linmiaohe@huawei.com Cc: stable@vger.kernel.org Reviewed-by: Sean Christopherson sean.j.christopherson@intel.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index e038a331583c..ef2d53854d15 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -4799,8 +4799,10 @@ static int handle_vmread(struct kvm_vcpu *vcpu) instr_info, true, len, &gva)) return 1; /* _system ok, nested_vmx_check_permission has verified cpl=0 */ - if (kvm_write_guest_virt_system(vcpu, gva, &value, len, &e)) + if (kvm_write_guest_virt_system(vcpu, gva, &value, len, &e)) { kvm_inject_page_fault(vcpu, &e); + return 1; + } }
return nested_vmx_succeed(vcpu);