netdev - Re: [PATCH] selinux: add a skb_owned

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Message-Id: <20130409.132350.1681660673457923647.davem@davemloft.net>
Date:	Tue, 09 Apr 2013 13:23:50 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	pmoore@...hat.com, netdev@...r.kernel.org, mvadkert@...hat.com,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH] selinux: add a skb_owned_by() hook

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 08 Apr 2013 20:58:11 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> Commit 90ba9b1986b5ac (tcp: tcp_make_synack() can use alloc_skb())
> broke certain SELinux/NetLabel configurations by no longer correctly
> assigning the sock to the outgoing SYNACK packet.
> 
> Cost of atomic operations on the LISTEN socket is quite big,
> and we would like it to happen only if really needed.
> 
> This patch introduces a new security_ops->skb_owned_by() method,
> that is a void operation unless selinux is active.
> 
> Reported-by: Miroslav Vadkerti <mvadkert@...hat.com>
> Diagnosed-by: Paul Moore <pmoore@...hat.com>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Since this fixes a regression that got added by the networking
tree, I'll push this to Linus, applied, thanks.
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