linux-kernel - Re: [PATCH 0/7 v22] LSM: Multiple concurrent LSMs

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Message-ID: <1431084080.3928.107.camel@linux.vnet.ibm.com>
Date:	Fri, 08 May 2015 07:21:20 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Casey Schaufler <casey@...aufler-ca.com>,
	Kees Cook <keescook@...omium.org>
Cc:	Stephen Smalley <sds@...ho.nsa.gov>,
	Paul Moore <paul@...l-moore.com>,
	James Morris <jmorris@...ei.org>,
	James Morris <james.l.morris@...cle.com>,
	LSM <linux-security-module@...r.kernel.org>,
	LKLM <linux-kernel@...r.kernel.org>,
	Paul Moore <pmoore@...hat.com>,
	John Johansen <john.johansen@...onical.com>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	Eric Paris <eparis@...hat.com>
Subject: Re: [PATCH 0/7 v22] LSM: Multiple concurrent LSMs

On Thu, 2015-05-07 at 13:36 -0700, Casey Schaufler wrote:
> On 5/7/2015 1:23 PM, Stephen Smalley wrote:
> > On 05/07/2015 04:22 PM, Mimi Zohar wrote:
> >> On Thu, 2015-05-07 at 14:07 -0400, Paul Moore wrote:
> >>> On Thu, May 7, 2015 at 10:47 AM, Casey Schaufler <casey@...aufler-ca.com> wrote:
> >>>> On 5/7/2015 4:37 AM, James Morris wrote:
> >>>>> On Sat, 2 May 2015, Casey Schaufler wrote:
> >>>>>
> >>>>>> Subject: [PATCH 0/7 v22] LSM: Multiple concurrent LSMs
> >>>>> Please add all of the Acked-by etc. from the patch review process.
> >>>> For v21 I had Acks from:
> >>>>
> >>>>         John Johansen <john.johansen@...onical.com>
> >>>>         Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
> >>>>         Stephen Smalley <sds@...ho.nsa.gov> (after patch 8/7)
> >>>>         Kees Cook <keescook@...omium.org>
> >>>>
> >>>> Would you check out v22 and supply (or not) your Acks?
> >>>>
> >>>> Eric, Paul, it would be reassuring if you'd chime in as well.
> >>> Kubernetes has swallowed Eric whole I'm afraid, I don't think you want
> >>> to wait on him to review these patches.
> >>>
> >>> However, it is a bit ridiculous that I haven't had time to seriously
> >>> review these patches yet; I promise to take a look and send my
> >>> comments/ACKs before my head hits the pillow tonight.
> >> Seems to be working with SELinux, EVM and IMA enabled.  I haven't tried
> >> enabling an additional LSM.   Casey, do you have an additional LSM for
> >> testing?
> > I've tested SELinux+Yama.
> 
> The deepest "stack" you can have today is Capability+Yama+YourChoice.
> You always get Capability, so you really only get to choose if you stack
> Yama with something else. That's not more depth than you had before, but
> the special case coding for Capability and Yama is replaced to the general
> scheme.

Nice cleanup!  I assume this will pave the way for other small, builtin
LSMs.  :)

I'm now running with Yama as well.  While enabling Yama, I noticed a
very minor issue with security/Kconfig.  It permits defining Yama as the
default LSM when it is stacked.

Mimi

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