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

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Date:	Mon, 08 Apr 2013 13:55:01 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Paul Moore <pmoore@...hat.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	mvadkert@...hat.com
Subject: Re: [PATCH] tcp: assign the sock correctly to an outgoing SYNACK
 packet

On Mon, 2013-04-08 at 16:37 -0400, Paul Moore wrote:

> The people who use this functionality almost never use upstream kernels, they 
> need to protection/certification/warm-fuzzies/etc. that come from a 
> distribution kernel and a support infrastructure.  I didn't catch it because I 
> use a slightly different configuration that didn't expose this bug; while I 
> would like to run a full regression test every release I simply don't have the 
> time to do that myself.
> 
> > This sounds like a very small issue to me, a revert is simply overkill.
> 
> It all depends on your use case.  To you, whom I assume doesn't use SELinux, 
> it is indeed a trivial issue.  To someone who relies on SELinux for its 
> network access controls this is a pretty significant issue.
> 

Is the patch I sent addressing the problem or not ?

Note that I do have : CONFIG_SECURITY=y

So this patch basically adds the overhead back, and I'll have to use
real hook later in net-next.

At least my patch clearly _shows_ the security requirement, instead of
relying on a side effect of a previous sock_wmalloc()

Again, it would be nice you understand the plan.


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