linux-kernel - Re: [RFC] capabilities: Ambient capabilities

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Message-ID: <alpine.DEB.2.11.1504241512570.11839@gentwo.org>
Date:	Fri, 24 Apr 2015 15:13:31 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Andy Lutomirski <luto@...capital.net>
cc:	Serge Hallyn <serge.hallyn@...ntu.com>,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Andrew Lutomirski <luto@...nel.org>, Ted Ts'o <tytso@....edu>,
	Andrew Morton <akpm@...uxfoundation.org>,
	"Andrew G. Morgan" <morgan@...nel.org>,
	Linux API <linux-api@...r.kernel.org>,
	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Austin S Hemmelgarn <ahferroin7@...il.com>,
	linux-security-module <linux-security-module@...r.kernel.org>,
	Aaron Jones <aaronmdjones@...il.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Markku Savela <msa@...h.iki.fi>,
	Kees Cook <keescook@...omium.org>,
	Jonathan Corbet <corbet@....net>
Subject: Re: [RFC] capabilities: Ambient capabilities

On Fri, 24 Apr 2015, Andy Lutomirski wrote:

> That's sort of what my patch does -- you need CAP_SETPCAP to switch
> the securebit.
>
> But Christoph's patch required it to add caps to the ambient set, right?

Yes but you seem to be just adding one additional step without too much of
a benefit because you still need CAP_SETPCAP.

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