linux-kernel - Re: [PATCH] CRED: Fix regression in cap_capable() as shown up by sys

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Message-ID: <alpine.LRH.1.10.0901051301590.14359@tundra.namei.org>
Date:	Mon, 5 Jan 2009 13:07:00 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	David Howells <dhowells@...hat.com>
cc:	Christoph Hellwig <hch@....de>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	"Serge E. Hallyn" <serue@...ibm.com>,
	linux-security-module@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH] CRED: Fix regression in cap_capable() as shown up by
 sys_faccessat() [ver #2]

On Wed, 31 Dec 2008, David Howells wrote:

> 
> Here's an improved patch.  It differentiates the use of objective and
> subjective capabilities by making capable() only check current's subjective
> caps, but making has_capability() check only the objective caps of whatever
> process is specified.
> 
> It's a bit more involved, but I think it's the right thing to do.

I think it's the right approach, too, and the patch seems ok to me.  I've 
applied it to 
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6#next

and expect to push it to Linus in the next day or so.  It's not a trivial 
change, and could do with more review (Serge?).

It seems that more testing should be done in linux-next vs. waiting for 
the merge window.


- James
-- 
James Morris
<jmorris@...ei.org>
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