netdev - Re: [PATCH] tcp: assign the sock correctly to an outgoing SYNACK packet

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Date:	Mon, 08 Apr 2013 17:10:43 -0400
From:	Paul Moore <pmoore@...hat.com>
To:	David Miller <davem@...emloft.net>
Cc:	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
	mvadkert@...hat.com, selinux@...ho.nsa.gov,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] tcp: assign the sock correctly to an outgoing SYNACK packet

On Monday, April 08, 2013 02:32:00 PM Paul Moore wrote:
> On Monday, April 08, 2013 02:12:01 PM Paul Moore wrote:
> > On Monday, April 08, 2013 10:47:47 AM Eric Dumazet wrote:
> > > On Mon, 2013-04-08 at 13:40 -0400, Paul Moore wrote:
> > > > Sort of a similar problem, but not really the same.  Also, arguably,
> > > > there is no real associated sock/socket for a RST so orphaning the
> > > > packet makes sense. In the case of a SYNACK we can, and should,
> > > > associate the packet with a sock/socket.
> > > 
> > > What is the intent ?
> > 
> > We have to do a number of painful things in SELinux because we aren't
> > allowed a proper security blob (void *security) in a sk_buff.  One of
> > those things ...
> 
> Actually, I wonder if this problem means it is a good time to revisit the
> no- security-blob-in-sk_buff decision?  The management of the blob would be
> hidden behind the LSM hooks like everything else and it would have a number
> of advantages including making problems like we are seeing here easier to
> fix or avoid entirely.  It would also make life much easier for those of
> working on LSM stuff and it would pave the way for including network access
> controls in the stacked-LSM stuff Casey is kicking around.

No comment, or am I just too anxious?

-- 
paul moore
security and virtualization @ redhat

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