linux-kernel - Re: [RFC Part2 PATCH v3 15/26] KVM: SVM: Add support for SEV LAUNCH

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Message-ID: <20170913183701.2gxm4d4gngp4vgd2@pd.tnic>
Date:   Wed, 13 Sep 2017 20:37:01 +0200
From:   Borislav Petkov <bp@...e.de>
To:     Brijesh Singh <brijesh.singh@....com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, kvm@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Joerg Roedel <joro@...tes.org>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        \"Radim Krčmář\" <rkrcmar@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [RFC Part2 PATCH v3 15/26] KVM: SVM: Add support for SEV
 LAUNCH_START command

On Wed, Sep 13, 2017 at 01:23:08PM -0500, Brijesh Singh wrote:
> Yes, I will add some upper bound check on the length field and add the
> sanity-check just after copying the parameters from userspace

Also, you could either fail the command if some of the reserved fields
are set - picky - or zero them out - less picky :)

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--