netdev - Re: [PATCH net] tcp: fix req->saved

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Date:	Thu, 05 Nov 2015 14:36:40 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, ycai@...gle.com
Subject: Re: [PATCH net] tcp: fix req->saved_syn race

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 05 Nov 2015 11:07:13 -0800

> From: Eric Dumazet <edumazet@...gle.com>
> 
> For the reasons explained in commit ce1050089c96 ("tcp/dccp: fix
> ireq->pktopts race"), we need to make sure we do not access
> req->saved_syn unless we own the request sock.
> 
> This fixes races for listeners using TCP_SAVE_SYN option.
> 
> 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>
> Reported-by: Ying Cai <ycai@...gle.com>

Applied.
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