linux-kernel - Re: [PATCH] capabilities: Ambient capability set V2

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Date:	Fri, 6 Mar 2015 11:02:43 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Christoph Lameter <cl@...ux.com>
Cc:	"Serge E. Hallyn" <serge@...lyn.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Jonathan Corbet <corbet@....net>,
	Aaron Jones <aaronmdjones@...il.com>,
	LSM List <linux-security-module@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...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 API <linux-api@...r.kernel.org>,
	Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [PATCH] capabilities: Ambient capability set V2

On Fri, Mar 6, 2015 at 10:53 AM, Christoph Lameter <cl@...ux.com> wrote:
> On Fri, 6 Mar 2015, Serge E. Hallyn wrote:
>
>> Sorry, something about that patch-patch didn't make sense to me, but I
>> need to look more closely.  My objection was that you were able to get the
>> pA capabilities into pP without them being in your pI.  Your proposed
>> change didn't seem like it would fix that.
>
> Just tried to fix that. Could it be that cap_inherited is never set even
> for a binary that has
>
> christoph@...itsu-haswell:~$ getcap ambient_test
>
> ambient_test = cap_setpcap,cap_net_admin,cap_net_raw,cap_sys_nice+eip

I think that's right.  fI doesn't set pI.

--Andy
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