netdev - Re: Possible fix

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Message-ID: <20140307112334.GT32371@secunet.com>
Date:	Fri, 7 Mar 2014 12:23:34 +0100
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Paul Moore <paul@...l-moore.com>
CC:	Nikolay Aleksandrov <nikolay@...hat.com>, <netdev@...r.kernel.org>,
	Dave Jones <davej@...hat.com>, Fan Du <fan.du@...driver.com>,
	"David S. Miller" <davem@...emloft.net>,
	<linux-security-module@...r.kernel.org>
Subject: Re: Possible fix

On Thu, Mar 06, 2014 at 10:04:54PM -0500, Paul Moore wrote:
> On Wednesday, March 05, 2014 01:20:09 PM Steffen Klassert wrote:
> >
> > Right, that's not really surprising. But it is a bit surprising that
> > we care for the security context only if we add a socket policy via
> > the pfkey key manager. The security context is not handled if we do
> > that with the netlink key manager, see xfrm_compile_policy().
> > 
> > I'm not that familiar with selinux and labeled IPsec, but maybe this
> > needs to be implemented in xfrm_compile_policy() too.
> 
> Okay, I see your point.  We probably should add support for per-socket policy 
> labels just to keep parity with the pfkey code (and this is far removed from 
> any critical path), but to be honest it isn't something that I think would get 
> much use in practice.  Labeled networking users tend to fall under the very 
> strict, one-system-wide-security-policy and per-socket policies tend to go 
> against that logic.
> 

If you think socket policy labels are no usecase for labeled IPsec, we could
fix this bug simply by removing the code from pfkey ;)

Otherwise I think we should implement it for xfrm_compile_policy() too.
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