linux-kernel - Re: [PATCH v2 2/4] xen/netfront: don't read data from request on the ring page

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Message-ID: <9ca2d6a2-03a5-ff4e-8d20-dfad9cd14e4f@suse.com>
Date:   Tue, 24 Aug 2021 17:24:30 +0200
From:   Jan Beulich <jbeulich@...e.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        xen-devel@...ts.xenproject.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] xen/netfront: don't read data from request on the
 ring page

On 24.08.2021 12:28, Juergen Gross wrote:
> In order to avoid a malicious backend being able to influence the local
> processing of a request build the request locally first and then copy
> it to the ring page. Any reading from the request influencing the
> processing in the frontend needs to be done on the local instance.
> 
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Jan Beulich <jbeulich@...e.com>