linux-kernel - Re: [PATCH] cgroups: implement device whitelist lsm (v3)

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Date:	Mon, 17 Mar 2008 23:48:42 -0700
From:	Greg KH <greg@...ah.com>
To:	Stephen Smalley <sds@...ch.ncsc.mil>
Cc:	casey@...aufler-ca.com, "Serge E. Hallyn" <serue@...ibm.com>,
	James Morris <jmorris@...ei.org>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Linux Containers <containers@...ts.osdl.org>,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: [PATCH] cgroups: implement device whitelist lsm (v3)

On Mon, Mar 17, 2008 at 09:26:39AM -0400, Stephen Smalley wrote:
> > > The original promise was that LSM would allow kernels to be built that
> > > shed capabilities altogether,
> > 
> > I don't remember that, but it's been a long time so it could be true.
> 
> "One of the explicit requirements to get LSM into the kernel was to have
> the ability to make capabilities be a module.  This allows the embedded
> people to completely remove capabilities, as they really want this.  I
> don't think we can ignore this, no matter how much of a pain in the butt
> it is :)" - Greg KH
> 
> Quoted from:
> http://marc.info/?l=linux-security-module&m=99236500727804&w=2
> 
> Ironically, since that time, capabilities have doubled in size and still
> can't be removed from the core kernel since LSM didn't push the state
> into the security blobs.

Maybe we need to seriously revisit this and perhaps rip capabilities
back out and put it always into the kernel if it's always a requirement.

Comments made 7 years ago might be totally wrong when we have now
learned how this all has worked out...

thanks,

greg k-h
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