Re: [netfilter bug] BUG: using smp_processor_id() in preemptible[00000000] code: ssh/9115, caller is ipt_do_table+0xc8/0x559

From: Eric Dumazet
Date: Thu Apr 02 2009 - 16:18:56 EST


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@xxxxxxxxx>
Signed-off-by: Eric Dumazet <dada1@xxxxxxxxxxxxx>
Acked-by: Patrick McHardy <kaber@xxxxxxxxx>
Acked-by: Stephen Hemminger <shemminger@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>


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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