linux-kernel - Re: [PATCH v2 8/8] KVM: x86: Bug the VM on an out-of-bounds data read

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Message-ID: <202205311106.76479DB1E6@keescook>
Date:   Tue, 31 May 2022 11:06:15 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.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, Robert Dinse <nanook@...imo.com>
Subject: Re: [PATCH v2 8/8] KVM: x86: Bug the VM on an out-of-bounds data read

On Thu, May 26, 2022 at 09:08:17PM +0000, Sean Christopherson wrote:
> Bug the VM and terminate emulation if an out-of-bounds read into the
> emulator's data cache occurs.  Knowingly contuining on all but guarantees
> that KVM will overwrite random kernel data, which is far, far worse than
> killing the VM.
> 
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Kees Cook <keescook@...omium.org>

-- 
Kees Cook