linux-kernel - Re: [PATCH] Fix repeatable Oops on container destroy with conntrack

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 28 Sep 2011 23:08:51 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Alex Bligh <alex@...x.org.uk>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	netfilter-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	Linux Containers <containers@...ts.osdl.org>,
	netdev@...r.kernel.org
Subject: Re: [PATCH] Fix repeatable Oops on container destroy with conntrack

On Wed, Sep 14, 2011 at 09:01:34AM +0100, Alex Bligh wrote:
> --On 14 September 2011 03:35:00 +0200 Pablo Neira Ayuso
> <pablo@...filter.org> wrote:
> 
> >>Is this new version OK? I am happy to adjust if not.
> >
> >Hm, I still think that this is a workaround.
> 
> It is a bit of a workaround, that is true. But it is a workaround
> that will fix the bug in every kernel since 2.6.32 (and perhaps
> before - I haven't looked). It's thus reasonably easily applicable
> to stable kernel series.

The container support for netfilter seems to be in intermediate state,
we need several patches to get it finished that:

* subsys_table definition in nfnetlink.c.
* ctnl_notifier and ctnl_notifier_exp definitions in
  nfnetlink_conntrack.c
* similar things for nfnetlink_queue and nfnetlink_log.

If nobody is going to fix all these, I'll find some spare time to do
it myself, but I don't think we'll have a proper fix that we can pass
to -stable. This will have to go to net-next, given the amount of
patches that we'll need to appropriately fix this.

> I'm not clued-up enough on Netfilter to know what the right fix is,
> but is applying the workaround in a commit which could be easily
> backported, then applying the 'right fix' (assuming that is different)
> a reasonable strategy?
> 
> As you can probably tell, my interest here is to get something that
> doesn't oops into stable kernels.

As said, I'm not sure that this can happen, given that the amount of
patches that we need to fix it fine, sorry.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/