linux-kernel - Re: kdbus: credential faking

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Message-ID: <20150711110241.GA22804@infradead.org>
Date:	Sat, 11 Jul 2015 04:02:41 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	David Herrmann <dh.herrmann@...il.com>
Cc:	Stephen Smalley <sds@...ho.nsa.gov>,
	Greg KH <gregkh@...uxfoundation.org>,
	Daniel Mack <daniel@...que.org>,
	Djalal Harouni <tixxdz@...ndz.org>,
	lkml <linux-kernel@...r.kernel.org>,
	LSM <linux-security-module@...r.kernel.org>,
	Paul Osmialowski <p.osmialowsk@...sung.com>,
	Casey Schaufler <casey@...aufler-ca.com>,
	Paul Moore <paul@...l-moore.com>
Subject: Re: kdbus: credential faking

On Fri, Jul 10, 2015 at 03:43:08PM +0200, David Herrmann wrote:
> We need binary compatibility to dbus1. There're millions of
> applications and language bindings with dbus1 compiled in, which we
> cannot suddenly break.

But they can keep using the existing userspace dbus1, and move over
to an in-kernel dbus2 after being audited/ported.

This whole argumet of we did something stupid in userspace long ago, and
now need to move it to kernelspace is not very helpful.
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