linux-kernel - Re: [PATCH v2 1/2] capabilities: Ambient capabilities

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Message-ID: <CALCETrV1+3ZuL0MkqQaRoQ8r2V=EcQQEodOdCdP0p-BK1PixGg@mail.gmail.com>
Date:	Tue, 19 May 2015 10:20:02 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	"Ted Ts'o" <tytso@....edu>, "Andrew G. Morgan" <morgan@...nel.org>,
	Andrew Morton <akpm@...uxfoundation.org>,
	Serge Hallyn <serge.hallyn@...ntu.com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Linux API <linux-api@...r.kernel.org>,
	Austin S Hemmelgarn <ahferroin7@...il.com>,
	linux-security-module <linux-security-module@...r.kernel.org>,
	Aaron Jones <aaronmdjones@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Markku Savela <msa@...h.iki.fi>,
	Kees Cook <keescook@...omium.org>,
	Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH v2 1/2] capabilities: Ambient capabilities

On May 19, 2015 8:37 AM, "Christoph Lameter" <cl@...ux.com> wrote:
>
> On Mon, 18 May 2015, Andy Lutomirski wrote:
>
> > > Could you provide an example to demonstrate how it is to be used?
> > > Something similar to what I had in my patch?
> > >
> >
> > Do you mean something like:
> >
> > setpriv --ambient-caps=+net_bind_service --inh-haps=+net_bind_service
> > --euid=500 --ruid=500 bash
>
> Ok that means we also depend on a tool upgrade.
>

I think this is unavoidable, unless we want to change the semantics of
inheritable caps, and that would open a giant can of worms.

--Andy
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