From: "Daniel P. Berrange" <berrange@redhat.com>
To: Eric Blake <eblake@redhat.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Anthony Liguori <anthony@codemonkey.ws>,
Stefan Berger <stefanb@linux.vnet.ibm.com>
Subject: Re: [Qemu-devel] virtio-rng and fd passing
Date: Mon, 4 Mar 2013 10:29:37 +0000 [thread overview]
Message-ID: <20130304102937.GB8123@redhat.com> (raw)
In-Reply-To: <51313660.5010001@redhat.com>
On Fri, Mar 01, 2013 at 04:14:40PM -0700, Eric Blake wrote:
> > I understand the reason that fdsets exist (because NFS is stupid and
> > doesn't support labeling). But we aren't doing dynamic labeling of
> > /dev/random and I strongly suspect it's not on NFS anyway.
> >
> > So why are we trying to pass fds here?
>
> Consistency - how do you write a policy that allows open("/dev/random")
> while forbidding open("/nfs/...")? It's much simpler to forbid open(),
> even if /dev/random doesn't have any labeling issues.
IIUC, it is actually pretty straightforward from a policy POV. Every
filesystem has a unique type, and SELinux can make rules scoped to that
filesystem type. That's how we have the 'virt_use_nfs' tunable already
which only affects NFS.
Daniel
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next prev parent reply other threads:[~2013-03-04 10:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <512FF819.7050505@redhat.com>
2013-03-01 9:51 ` [Qemu-devel] virtio-rng and fd passing Paolo Bonzini
2013-03-04 4:29 ` Amit Shah
2013-03-06 6:20 ` Amit Shah
2013-03-01 19:37 ` H. Peter Anvin
2013-03-01 20:13 ` Stefan Berger
2013-03-01 20:15 ` H. Peter Anvin
2013-03-01 20:41 ` Paolo Bonzini
2013-03-01 20:04 ` Anthony Liguori
2013-03-01 20:34 ` Stefan Berger
2013-03-01 21:08 ` Anthony Liguori
2013-03-01 21:13 ` Eric Blake
2013-03-01 23:05 ` Anthony Liguori
2013-03-01 23:14 ` Eric Blake
2013-03-01 23:59 ` Anthony Liguori
2013-03-02 0:29 ` Eric Blake
2013-03-02 3:13 ` Anthony Liguori
2013-03-02 12:23 ` Paolo Bonzini
2013-03-03 21:05 ` Anthony Liguori
2013-03-04 21:57 ` Eric Blake
2013-03-04 22:24 ` Anthony Liguori
2013-03-04 22:35 ` Eric Blake
2013-03-05 4:44 ` H. Peter Anvin
2013-03-04 21:54 ` Eric Blake
2013-03-02 0:34 ` Stefan Berger
2013-03-02 3:17 ` Anthony Liguori
2013-03-02 3:34 ` Stefan Berger
2013-03-03 21:06 ` Anthony Liguori
2013-03-04 15:27 ` Corey Bryant
2013-03-04 10:29 ` Daniel P. Berrange [this message]
2013-03-04 15:55 ` Corey Bryant
2013-03-01 22:59 ` Peter Krempa
2013-03-01 23:14 ` Anthony Liguori
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