netdev - Re: [PATCH] iptables: xt

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Date:	Fri, 20 Feb 2009 19:33:43 +0100 (CET)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Eric Dumazet <dada1@...mosbay.com>
cc:	Patrick McHardy <kaber@...sh.net>,
	Stephen Hemminger <shemminger@...tta.com>,
	David Miller <davem@...emloft.net>,
	Rick Jones <rick.jones2@...com>, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] iptables: xt_hashlimit fix


On Friday 2009-02-20 19:10, Eric Dumazet wrote:
>
>Damned this broke xt_hashlimit, version=0
>Look file "net/netfilter/xt_hashlimit.c" line 706
>
>    /* Ugly hack: For SMP, we only want to use one set */
>    r->u.master = r;
>
>So, it appears some modules are using pointers to themselves, what a hack :(
>We probably need an audit of other modules.

xt_limit and xt_statistic are affected; I'll happily fix that up.

>Commit 784544739a25c30637397ace5489eeb6e15d7d49
>(netfilter: iptables: lock free counters) broke xt_hashlimit netfilter module :
>
>This module was storing a pointer inside its xt_hashlimit_info, and 
>this pointer is not relocated when we temporarly switch tables 
>(iptables -L).

Patch ok.
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