Re: [PATCH] death_by_event() does not check IPS_DYING_BIT - race condition against ctnetlink_del_conntrack

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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)
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