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Date:	Tue, 05 Jun 2007 13:02:19 -0700 (PDT)
From:	David Miller <>
Subject: Re: [BUG] UDP : bind() checks are not complete

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

> 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.
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