linux-kernel - Re: bad pmd ffff810000207238(9090909090909090).

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Date:	Tue, 27 May 2008 21:09:24 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Fede <fedux@...men.org.ar>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: bad pmd ffff810000207238(9090909090909090).

On Tue, 27 May 2008 23:01:01 -0300
Fede <fedux@...men.org.ar> wrote:

> Hi,
> 
> Today I tried to start a firewalling script and failed due to an 
> unrelated issue, but when I checked the log I saw this:
> 
> May 27 20:38:15 kaoz ip_tables: (C) 2000-2006 Netfilter Core Team
> May 27 20:38:28 kaoz Netfilter messages via NETLINK v0.30.
> May 27 20:38:28 kaoz nf_conntrack version 0.5.0 (16384 buckets, 65536
> max) May 27 20:38:28 kaoz ctnetlink v0.93: registering with nfnetlink.
> May 27 20:38:28 kaoz ClusterIP Version 0.8 loaded successfully
> May 27 20:38:28 kaoz mm/memory.c:127: bad pmd 
> ffff810000207238(9090909090909090).


909090 is asm for "nop nop nop", a pattern often used in rootkits to
deal with slightly unknown memory locations



I would REALLY REALLY strongly suggest that you check for rootkits and
the like on your system...



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