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Date:	Tue, 05 Jun 2007 22:22:36 +0200
From:	Eric Dumazet <>
To:	David Miller <>
Subject: Re: [BUG] UDP : bind() checks are not complete

David Miller a écrit :
> From: Eric Dumazet <>
> Date: Tue, 5 Jun 2007 19:15:36 +0200
>> I discovered one big problem with UDP binding in 2.6.22-rc4 :
> Thanks for finding this problem, the crux of the issue is

Well, I feel guilty as I was initial patch submiter :(

>> We really should check no socket is bound to XXX.XXX.XXX.XXX:32769. With current hashing, 
>> it means checking all slots in udptable[] :(
>> Our choices are :
>> 1) Drop all thoses patches and re-think them for 2.6.23 eventually
>> 2) Add the extra check for ANY_ADDR sockets and perform a full scan
>> What do you think ?
> Does checking for INADDR_ANY sockets really require a full scan?
> It should just need two hash probes as far as I can tell to see
> if there is "" bound already.

Well, we might have 1000 ip addresses on the machine (or not :) ), and ... already bound.

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