netdev - Re: [PATCH net-next 4/5] sctp: Avoid memory overflow while FWD-TSN chunk is received with bad stream ID

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Message-Id: <20081225.165833.216057003.davem@davemloft.net>
Date:	Thu, 25 Dec 2008 16:58:33 -0800 (PST)
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 net-next 4/5] sctp: Avoid memory overflow while FWD-TSN
 chunk is received with bad stream ID

From: Vlad Yasevich <vladislav.yasevich@...com>
Date: Fri, 19 Dec 2008 20:47:51 -0500

> If FWD-TSN chunk is received with bad stream ID, the sctp will not do the
> validity check, this may cause memory overflow when overwrite the TSN of
> the stream ID.
> 
> The FORWARD-TSN chunk is like this:
> 
> FORWARD-TSN chunk
>   Type                       = 192
>   Flags                      = 0
>   Length                     = 172
>   NewTSN                     = 99
>   Stream                     = 10000
>   StreamSequence             = 0xFFFF
> 
> This patch fix this problem by discard the chunk if stream ID is not
> less than MIS.
> 
> Signed-off-by: Wei Yongjun <yjwei@...fujitsu.com>
> Signed-off-by: Vlad Yasevich <vladislav.yasevich@...com>

Applied and queued up for -stable.
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