From: Oliver <olipro@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: [PATCH] death_by_event() does not check IPS_DYING_BIT - race condition against ctnetlink_del_conntrack
Date: Thu, 30 Aug 2012 14:39:44 +0200 [thread overview]
Message-ID: <1833197.YFsvR70GWT@gentoovm> (raw)
In-Reply-To: <149613366.axl8ME3any@gentoovm>
On Thursday 30 August 2012 14:28:20 Oliver wrote:
> Yep, I'd be happy to test. I've also uncovered a new issue: I have two
> Active- Active machines (conntrackd running NOTRACK mode with both External
> and Internal cache disabled)
>
> In kernel 3.2 this pair works asymmetric and issue-free. Upgrade it to 3.4
> and it immediately has around 50% failure of TCP connection attempts on
> systems behind them - ICMP on the other hand is flawless, DNS lookups also
> are OK so I *believe* that UDP may also be performing well - I've no idea
> where to even look on this one so any insight would be most appreciated.
>
> Kind Regards,
> Oliver
Another thing that just entered my mind: I configured raw/PREROUTING to -j CT
--notrack TCP port 80 (source and dest) on the appropriate interfaces and this
resulted in total loss despite the fact that I had --ctstate UNTRACKED set to
ACCEPT - and again, this behaviour only occurs under 3.4.[9|10] (probably
earlier too but I didn't test)
next prev parent reply other threads:[~2012-08-30 12:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-27 9:33 [PATCH] death_by_event() does not check IPS_DYING_BIT - race condition against ctnetlink_del_conntrack Oliver
2012-08-28 10:52 ` Pablo Neira Ayuso
2012-08-28 17:16 ` Oliver
2012-08-28 23:10 ` Oliver
2012-08-30 0:52 ` Pablo Neira Ayuso
2012-08-30 2:05 ` Oliver
2012-08-30 2:25 ` Pablo Neira Ayuso
[not found] ` <5427975.6moJlq4F9d@gentoovm>
[not found] ` <20120830025009.GA16782@1984>
2012-08-30 3:09 ` Oliver
2012-08-30 10:34 ` Pablo Neira Ayuso
2012-08-30 12:28 ` Oliver
2012-08-30 12:39 ` Oliver [this message]
2012-08-30 16:22 ` Pablo Neira Ayuso
2012-08-30 17:49 ` Oliver
2012-08-30 18:39 ` Pablo Neira Ayuso
2012-08-31 0:19 ` Oliver
2012-08-31 9:27 ` Pablo Neira Ayuso
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