netdev - Re: [PATCH net v2] ipv4: fix redirect handling for TCP packets

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Date:	Mon, 27 May 2013 23:40:08 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mkubecek@...e.cz
Cc:	netdev@...r.kernel.org, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net
Subject: Re: [PATCH net v2] ipv4: fix redirect handling for TCP packets

From: Michal Kubecek <mkubecek@...e.cz>
Date: Tue, 28 May 2013 08:26:49 +0200

> Unlike ipv4_redirect() and ipv4_sk_redirect(), ip_do_redirect()
> doesn't call __build_flow_key() directly but via
> ip_rt_build_flow_key() wrapper. This leads to __build_flow_key()
> getting pointer to IPv4 header of the ICMP redirect packet
> rather than pointer to the embedded IPv4 header of the packet
> initiating the redirect.
> 
> As a result, handling of ICMP redirects initiated by TCP packets
> is broken. Issue was introduced by
> 
> 	4895c771c ("ipv4: Add FIB nexthop exceptions.")
> 
> Signed-off-by: Michal Kubecek <mkubecek@...e.cz>

Applied, thanks!

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