linux-kernel - Re: [patch] KVM: SVM: prevent DBG_DECRYPT and DBG

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Message-ID: <0ba6d873-6567-f20a-c5c1-59fc2c97968e@amd.com>
Date:   Thu, 28 Mar 2019 13:58:05 +0000
From:   "Singh, Brijesh" <brijesh.singh@....com>
To:     David Rientjes <rientjes@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>
CC:     "Singh, Brijesh" <brijesh.singh@....com>,
        Borislav Petkov <bp@...e.de>,
        "x86@...nel.org" <x86@...nel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [patch] KVM: SVM: prevent DBG_DECRYPT and DBG_ENCRYPT overflow



On 3/25/19 1:47 PM, David Rientjes wrote:
> This ensures that the address and length provided to DBG_DECRYPT and
> DBG_ENCRYPT do not cause an overflow.
> 
> At the same time, pass the actual number of pages pinned in memory to
> sev_unpin_memory() as a cleanup.
> 
> Reported-by: Cfir Cohen <cfir@...gle.com>
> Signed-off-by: David Rientjes <rientjes@...gle.com>
> ---
>   arch/x86/kvm/svm.c | 12 +++++++++---
>   1 file changed, 9 insertions(+), 3 deletions(-)
> 


Reviewed-by: Brijesh Singh <brijesh.singh@....com>

thanks