netdev - Re: [PATCH] sfq: add dummy bind/unbind handles

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Date:	Sat, 07 Aug 2010 22:45:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	shemminger@...tta.com, netdev@...r.kernel.org, franchoze@...dex.ru
Subject: Re: [PATCH] sfq: add dummy bind/unbind handles

From: Jarek Poplawski <jarkao2@...il.com>
Date: Sat, 07 Aug 2010 01:17:07 +0200

> Stephen Hemminger wrote, On 07.08.2010 00:23:
> 
>> Applying a filter to an SFQ qdisc would cause null dereference
>> in tcf_bind_filter because although SFQ is classful it didn't
>> have all the necessary equipment.
>> 
>> Better alternative to changing tcf_bind API is to just fix
>> SFQ.  This should go to net-2.6 and stable.
>> 
> 
> Hmm... FYI, actually I've sent already a similar patch to the
> original bug report thread (except .unbind_tcf method which
> doesn't matter for fixing this bug, so should be rather
> implemented in a separate patch, if needed at all in this
> case).

Agreed, I can't see a way that unbind can ever be invoked
if the bind call always returns zero.

Therefore I'll apply Jarek's patch, thanks everyone.
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