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

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Message-ID: <20150307213522.GA9833@mail.hallyn.com>
Date:	Sat, 7 Mar 2015 15:35:22 -0600
From:	"Serge E. Hallyn" <serge@...lyn.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Andy Lutomirski <luto@...capital.net>,
	"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 Sat, Mar 07, 2015 at 09:06:46AM -0600, Christoph Lameter wrote:
> On Fri, 6 Mar 2015, Andy Lutomirski wrote:
> 
> > > 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.
> 
> Ok then that is the point of pI if it cannot be set?

It can be set!  Anything with CAP_SETPCAP can fill it's pI.  When
it and its children exec(), pI' = pI.
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