Date: Wed, 29 Oct 2014 15:25:31 -0700
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Linux API <linux-api@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        John Stultz <john.stultz@linaro.org>, Arnd Bergmann <arnd@arndb.de>,
        Tejun Heo <tj@kernel.org>, Marcel Holtmann <marcel@holtmann.org>,
        Ryan Lortie <desrt@desrt.ca>, Bastien Nocera <hadess@hadess.net>,
        David Herrmann <dh.herrmann@gmail.com>,
        Djalal Harouni <tixxdz@opendz.org>, simon.mcvittie@collabora.co.uk,
        daniel@zonque.org, alban.crequy@collabora.co.uk,
        javier.martinez@collabora.co.uk, Tom Gundersen <teg@jklm.no>
Subject: Re: [PATCH 00/12] Add kdbus implementation
Message-ID: <20141029222531.GA8129@kroah.com>
References: <1414620056-6675-1-git-send-email-gregkh@linuxfoundation.org>
 <CALCETrUBegZ4F1sKq3LxUgANX3=syYOrqOp9=F--g9pkVHHgUA@mail.gmail.com>
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On Wed, Oct 29, 2014 at 03:19:21PM -0700, Andy Lutomirski wrote:
> On Wed, Oct 29, 2014 at 3:00 PM, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >  * Attachment of trustable metadata to each message on demand, such as
> >    the sending peer's timestamp, creds, auxgroups, comm, exe, cmdline,
> >    cgroup path, capabilities, security label, audit information, etc,
> >    each taken at the time the sender issued the ioctl to send the
> >    message. Which of those are actually recorded and attached is
> >    controlled by the receiving peer.
> 
> I think that each piece of trustable metadata needs to be explicitly
> opted-in to by the sender at the time of capture.  Otherwise you're
> asking for lots of information leaks and privilege escalations.  This
> is especially important given that some of the items in the current
> list could be rather sensitive.

You do have to opt-in for this information at time of capture, so I
don't understand the issue here.  This is the same type of thing that
dbus does today, and I don't see the information leaks happening there,
do you?

thanks,

greg k-h
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