linux-kernel - Re: [netfilter bug] BUG: using smp_processor_id() in preemptible [00000000] code: ssh/9115, caller is ipt_do

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Message-ID: <49D51D86.9030906@cosmosbay.com>
Date:	Thu, 02 Apr 2009 22:18:14 +0200
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Patrick McHardy <kaber@...sh.net>,
	Rusty Russell <rusty@...tcorp.com.au>, coreteam@...filter.org
Subject: Re: [netfilter bug] BUG: using smp_processor_id() in preemptible
 [00000000] code: ssh/9115, caller is ipt_do_table+0xc8/0x559

Ingo Molnar a écrit :
> Not sure whether this bug has been reported before (a quick subject 
> search on netdev and lkml suggests that it's not):
> 
> i switched over -tip to latest -git an hour ago (it was on a v2.6.29 
> base before that), and one of my testboxes started emitting lots of 
> these warnings:


Hi Ingo

David put into its tree fix for that a few hours ago

commit fa9a86ddc8ecd2830a5e773facc250f110300ae7

(netfilter: iptables: lock free counters) forgot to disable BH
in arpt_do_table(), ipt_do_table() and  ip6t_do_table()

Use rcu_read_lock_bh() instead of rcu_read_lock() cures the problem.

Reported-and-bisected-by: Roman Mindalev <r000n@...0n.net>
Signed-off-by: Eric Dumazet <dada1@...mosbay.com>
Acked-by: Patrick McHardy <kaber@...sh.net>
Acked-by: Stephen Hemminger <shemminger@...tta.com>
Signed-off-by: David S. Miller <davem@...emloft.net>


Should be pushed to Linus in next round

Thank you

http://git2.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commitdiff;h=fa9a86ddc8ecd2830a5e773facc250f110300ae7


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