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| author |   Jan Kiszka <jan.kiszka@siemens.com> | 2019-07-21 13:52:18 +0200 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2019-07-22 13:55:46 +0200 |
| commit | cf64527bb33f6cec2ed50f89182fc4688d0056b6 (patch) | |
| tree | 2eef194172094a59c68480db05ada2afc75b676e /arch | |
| parent | KVM: x86: Add fixed counters to PMU filter (diff) | |
| download | linux-dev-cf64527bb33f6cec2ed50f89182fc4688d0056b6.tar.xz linux-dev-cf64527bb33f6cec2ed50f89182fc4688d0056b6.zip | |
KVM: nVMX: Clear pending KVM_REQ_GET_VMCS12_PAGES when leaving nested
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 0f1378789bd0..4cdab4b4eff1 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -220,6 +220,8 @@ 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); |