Re: DDoS attack causing bad effect on conntrack searches

David Miller
2010-04-23T08:13:28Z

From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 23 Apr 2010 07:44:38 +0200

> Le jeudi 22 avril 2010 à 16:44 -0700, David Miller a écrit :
>> Eric, I wonder if we run into some kind of issue on 32-bit systems
>> because we always lose a bit of the conntrack hash value when we store
>> it into the 'nulls' area?
>>
>> Wouldn't that make the "get_nulls_value(n) != hash" fail?
>> --
>
>
> Well, 'hash' at this time is not the result of the jhash() transform [0
> - 0xFFFFFFFF], but a slot number in htable [0 - (300032-1)].

Aha, I see.

I really can't see what might cause this behavior then.
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