netdev - Re: [PATCH net-next] tcp/dccp: fix potential NULL deref in __inet_inherit

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Date:	Wed, 14 Oct 2015 19:08:57 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] tcp/dccp: fix potential NULL deref in
 __inet_inherit_port()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 14 Oct 2015 05:58:38 -0700

> From: Eric Dumazet <edumazet@...gle.com>
> 
> As we no longer hold listener lock in fast path, it is possible that a
> child is created right after listener freed its bound port, if a close()
> is done while incoming packets are processed.
> 
> __inet_inherit_port() must detect this and return an error,
> so that caller can free the child earlier.
> 
> Fixes: e994b2f0fb92 ("tcp: do not lock listener to process SYN packets")
> Fixes: 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied.
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