linux-kernel - Re: [PATCH] Access control in Xen privcmd_ioctl

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Date:	Wed, 02 Jan 2013 10:54:51 -0500
From:	Daniel De Graaf <dgdegra@...ho.nsa.gov>
To:	Tamas Lengyel <tamas.lengyel@...tific.com>
CC:	konrad.wilk@...cle.com, jeremy@...p.org,
	xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Access control in Xen privcmd_ioctl_mmap

On 12/31/2012 03:44 PM, Tamas Lengyel wrote:
> In the privcmd Linux driver two checks in the functions
> privcmd_ioctl_mmap and privcmd_ioctl_mmap_batch are not needed as they
> are trying to enforce hypervisor-level access control.  They should be
> removed as they break secondary control domains when performing dom0
> disaggregation. Xen itself provides adequate security controls around
> these hypercalls and these checks prevent those controls from
> functioning as intended.
> 
> The patch applies to the stable Linux 3.7.1 kernel.

It also applies to (and I have tested it on) 3.8-rc1.

> Signed-off-by: Tamas K Lengyel <tamas.lengyel@...tific.com>
> Cc: Daniel De Graaf <dgdegra@...ho.nsa.gov>
> Cc: xen-devel@...ts.xensource.com
> Cc: linux-kernel@...r.kernel.org

Acked-by: Daniel De Graaf <dgdegra@...ho.nsa.gov>
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