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]
Date:	Sun, 08 Aug 2010 09:04:46 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	David Miller <davem@...emloft.net>
CC:	shemminger@...tta.com, netdev@...r.kernel.org, franchoze@...dex.ru
Subject: Re: [PATCH] sfq: add dummy bind/unbind handles

David Miller wrote, On 08.08.2010 07:45:

> 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.

To tell the truth, I think unbind should be implemented anyway,
just for consistency, safety, and easier verification. But, looking
at a similar case of .get and .put in the same driver, Patrick
seemed to do it purposely, so I expected some discussion about the
rules yet, and made it minimal to ease merging to older kernels.
 
Thanks,
Jarek P.
--
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

Powered by blists - more mailing lists