netdev - Re: [PATCH 1/4] sctp: Drop ICMP packet too big message with MTU larger than current PMTU

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Date:	Thu, 23 Oct 2008 01:00:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	vladislav.yasevich@...com
Cc:	netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
	yjwei@...fujitsu.com
Subject: Re: [PATCH 1/4] sctp: Drop ICMP packet too big message with MTU
 larger than current PMTU

From: Vlad Yasevich <vladislav.yasevich@...com>
Date: Tue, 21 Oct 2008 22:08:44 -0400

> If ICMP packet too big message is received with MTU larger than current
> PMTU, SCTP will still accept this ICMP message and sync the PMTU of assoc
> with the wrong MTU.
> 
> Endpoing A                 Endpoint B
> (ESTABLISHED)              (ESTABLISHED)
> ICMP         --------->
> (packet too big, MTU too larger)
>                            sync PMTU
> 
> This patch fixed the problem by drop that ICMP message.
> 
> Signed-off-by: Wei Yongjun <yjwei@...fujitsu.com>
> Signed-off-by: Vlad Yasevich <vladislav.yasevich@...com>

Applied.
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