linux-kernel - Re: [PATCH v3 3/3] xen/privcmd: add IOCTL_PRIVCMD

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Message-ID: <98d4ae78-98f0-c3fd-e8c8-cdb18a7936e1@oracle.com>
Date:   Mon, 13 Feb 2017 14:20:27 -0500
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Paul Durrant <paul.durrant@...rix.com>,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>
Subject: Re: [PATCH v3 3/3] xen/privcmd: add IOCTL_PRIVCMD_RESTRICT



On 02/13/2017 12:03 PM, Paul Durrant wrote:
> The purpose if this ioctl is to allow a user of privcmd to restrict its
> operation such that it will no longer service arbitrary hypercalls via
> IOCTL_PRIVCMD_HYPERCALL, and will check for a matching domid when
> servicing IOCTL_PRIVCMD_DM_OP.

and IOCTL_PRIVCMD_MMAP*.

> The aim of this is to limit the attack
> surface for a compromised device model.


-boris