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KVM: nVMX: Reload vmcs01 if getting vmcs12's pages fails

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commit b89d5ad00e789967a5e2c5335f75c48755bebd88 upstream.

Reload vmcs01 when bailing from nested_vmx_enter_non_root_mode() as KVM
expects vmcs01 to be loaded when is_guest_mode() is false.

Fixes: 671ddc700f ("KVM: nVMX: Don't leak L1 MMIO regions to L2")
Cc: stable@vger.kernel.org
Cc: Dan Cross <dcross@google.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Peter Shier <pshier@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923184452.980-3-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sean Christopherson 2020-09-23 11:44:47 -07:00 • committed by Greg Kroah-Hartman
commit 413aeed195
1 changed files with 3 additions and 1 deletions
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4
arch/x86/kvm/vmx/nested.c
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@ -3096,8 +3096,10 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
prepare_vmcs02_early(vmx, vmcs12);
if (from_vmentry) {
if (unlikely(!nested_get_vmcs12_pages(vcpu)))
if (unlikely(!nested_get_vmcs12_pages(vcpu))) {
vmx_switch_vmcs(vcpu, &vmx->vmcs01);
return NVMX_VMENTRY_KVM_INTERNAL_ERROR;
}
if (nested_vmx_check_vmentry_hw(vcpu)) {
vmx_switch_vmcs(vcpu, &vmx->vmcs01);