netdev - Re: [PATCH 1/9] net classifier: dont allow filters on semi-classful qdisc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20100807.225905.135552260.davem@davemloft.net>
Date:	Sat, 07 Aug 2010 22:59:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: [PATCH 1/9] net classifier: dont allow filters on
 semi-classful qdisc

From: Jarek Poplawski <jarkao2@...il.com>
Date: Sat, 07 Aug 2010 00:26:17 +0200

> Stephen Hemminger wrote, On 06.08.2010 23:58:
> 
>> On Fri, 06 Aug 2010 23:24:47 +0200
>> Jarek Poplawski <jarkao2@...il.com> wrote:
>> 
>>> Stephen Hemminger wrote, On -10.01.-28163 20:59:
>>>
>>>> There are several qdisc which only support a single class (sfq, mq, tbf)
>>>> and the kernel would dereference a null pointer (bind_tcf), if a user
>>>> attempted to apply a filter one of these classes.
>>>
>>>
>>> mq and tbf can't have this issue because they don't have
>>> .tcf_chain class method. sfq should support it on purpose
>>> after this patch:
>>>
>>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7d2681a6ff4f9ab5e48d02550b4c6338f1638998
>>> and needs tiny fix only.
>> 
>> Probably best to fix both ways.  Fix sfq to allow filters to
>> be chained, and fix API to prevent refuse to allow qdisc to
>> register with tcf_chain && !bind_tcf
>> 
> 
> Yes, but your patch needs a different changelog and I'm not sure
> it's necessary for stable (there should be no other such cases
> for now).

Right.

I'm tossing this series since there are dependencies upon this first
patch for which we've arrived at a different solution (Jarek's
patch).
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html