linux-kernel - [PATCH 0/3] KVM: SVM: SEV{-ES} bug fixes

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Date:   Tue, 30 Mar 2021 20:19:33 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Brijesh Singh <brijesh.singh@....com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: [PATCH 0/3] KVM: SVM: SEV{-ES} bug fixes

Misc bug fixes in SEV/SEV-ES to protect against a malicious userspace.
All found by inspection, I didn't actually crash the host to to prove that
userspace could hose the kernel in any of these cases.  Boot tested an SEV
guest, though the SEV-ES side of patch 2 is essentially untested as I
don't have an SEV-ES setup at this time.

Sean Christopherson (3):
  KVM: SVM: Use online_vcpus, not created_vcpus, to iterate over vCPUs
  KVM: SVM: Do not set sev->es_active until KVM_SEV_ES_INIT completes
  KVM: SVM: Do not allow SEV/SEV-ES initialization after vCPUs are
    created

 arch/x86/kvm/svm/sev.c | 37 ++++++++++++++++++-------------------
 1 file changed, 18 insertions(+), 19 deletions(-)

-- 
2.31.0.291.g576ba9dcdaf-goog