linux-kernel - Re: [PATCH] capabilities: Ambient capability set V1

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Message-ID: <CALCETrWJCcBBGGp21C4cdtiU79K-P3t+6rFJUWcXcLR1jqrrFQ@mail.gmail.com>
Date:	Mon, 23 Feb 2015 07:44:48 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Serge Hallyn <serge.hallyn@...onical.com>,
	Aaron Jones <aaronmdjones@...il.com>,
	"Ted Ts'o" <tytso@....edu>,
	LSM List <linux-security-module@...r.kernel.org>,
	Andrew Morton <akpm@...uxfoundation.org>,
	"Andrew G. Morgan" <morgan@...nel.org>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Austin S Hemmelgarn <ahferroin7@...il.com>,
	Markku Savela <msa@...h.iki.fi>,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH] capabilities: Ambient capability set V1

On Mon, Feb 23, 2015 at 6:58 AM, Christoph Lameter <cl@...ux.com> wrote:
> Ok 4.0-rc1 is out and this patch has been sitting here for a couple of
> weeks without comment after an intensive discussion about the RFCs.
>
> Since there were no objections: Is there any chance to get this into -next
> somehow?
>

At the very least, I think it needs to define and implement what
happens when a cap is added to ambient and then dropped from
permitted. We also may need LSM_UNSAFE_something to clear the ambient
set to avoid a major security issue.

I'd like to discuss (in the hallway if nothing else) at LSF/MM with
whatever other interested people will be there.

--Andy

-- 
Andy Lutomirski
AMA Capital Management, LLC
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