From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Subject: bug#36335: Is /dev/kvm missing ACLs?
Date: Mon, 24 Jun 2019 21:54:54 +0200
Message-ID: <87v9wu4v3l.fsf@gnu.org>
References: <87sgs1c4r0.fsf@gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Return-path: <bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:470:142:3::10]:54319)
 by lists.gnu.org with esmtp (Exim 4.86_2)
 (envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1hfV4N-0002jk-FW
 for bug-guix@gnu.org; Mon, 24 Jun 2019 15:56:04 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1hfV4M-00065u-9L
 for bug-guix@gnu.org; Mon, 24 Jun 2019 15:56:03 -0400
Received: from debbugs.gnu.org ([209.51.188.43]:44496)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16)
 (Exim 4.71) (envelope-from <Debian-debbugs@debbugs.gnu.org>)
 id 1hfV4M-00064m-53
 for bug-guix@gnu.org; Mon, 24 Jun 2019 15:56:02 -0400
Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2)
 (envelope-from <Debian-debbugs@debbugs.gnu.org>) id 1hfV4L-0006wD-Ug
 for bug-guix@gnu.org; Mon, 24 Jun 2019 15:56:01 -0400
Sender: "Debbugs-submit" <debbugs-submit-bounces@debbugs.gnu.org>
Resent-Message-ID: <handler.36335.B36335.156140610526589@debbugs.gnu.org>
In-Reply-To: <87sgs1c4r0.fsf@gmail.com> (Chris Marusich's message of "Sat, 22
 Jun 2019 21:20:03 -0700")
List-Id: Bug reports for GNU Guix <bug-guix.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-guix>,
 <mailto:bug-guix-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/bug-guix>
List-Post: <mailto:bug-guix@gnu.org>
List-Help: <mailto:bug-guix-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-guix>,
 <mailto:bug-guix-request@gnu.org?subject=subscribe>
Errors-To: bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org
Sender: "bug-Guix" <bug-guix-bounces+gcggb-bug-guix=m.gmane.org@gnu.org>
To: Chris Marusich <cmmarusich@gmail.com>
Cc: 36335@debbugs.gnu.org

Hi Chris,

Chris Marusich <cmmarusich@gmail.com> skribis:

> I was trying to run some VMs via "guix system vm", and I noticed that
> I didn't have permission to use KVM.  This issue can be worked around by
> running qemu as root, or by adding yourself to the "kvm" group.
> However, I found it curious that the /dev/kvm device didn't have ACLs
> granting me access:
>
> $ getfacl /dev/kvm
> getfacl: Removing leading '/' from absolute path names
> # file: dev/kvm
> # owner: root
> # group: kvm
> user::rw-
> group::rw-
> other::---
>
>
> Is it expected that on Guix System, /dev/kvm does not by default receive
> ACLs granting me access?

Guix System doesn=E2=80=99t use ACLs at all.

However, the udev rule for kvm sets it up like this:

  crw-rw---- 1 root kvm 10, 232 Jun 24 08:38 /dev/kvm

and the build users are part of the =E2=80=98kvm=E2=80=99 group.  I persona=
lly arrange
to have my user account in that group too.

Thanks,
Ludo=E2=80=99.