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Date: Mon, 28 May 2001 13:48:33 +1000
From: Peter Jeremy <peter.jeremy@alcatel.com.au>
Subject: Re: freelist corruption
In-reply-to: <20010527203654.A17801@xor.obsecurity.org>; from
 kris@obsecurity.org on Sun, May 27, 2001 at 08:36:54PM -0700
To: Kris Kennaway <kris@obsecurity.org>
Cc: current@FreeBSD.ORG
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On 2001-May-27 20:36:54 -0700, Kris Kennaway <kris@obsecurity.org> wrote:
>I've been getting rather a lot of these tonight..any ideas?
>
>May 27 18:52:06 xor /boot/kernel/kernel: Data modified on freelist: word 2 of object 0xc1a60100 size 64 previous type pagedep (0xd6adc0de != 0xdeadc0de)

If this isn't an ECC system, it could be a flaky SIMM (or flaky
cache).  There's a single bit difference.  (Though I'd expect more
obvious problems if bit 27 was incorrectly reading as zero at a
detectable rate).

Peter

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