Subject: Re: kernel message: Data modified on freelist
To: None <current-users@netbsd.org>
From: Thor Lancelot Simon <tls@rek.tjls.com>
List: current-users
Date: 02/28/2000 16:29:02
On Mon, Feb 28, 2000 at 03:04:58PM -0600, Brian Stark wrote:
> On Mon, 28 Feb 2000, Markus Kilbinger wrote:
> 
> > Hi!
> > 
> > Can anybody explain to me the following kernel message I get on one of
> > our NetBSD/i386 v1.4.2 machine:
> > 
> >   Data modified on freelist: word 6 of object 0xc041f000 size 80
> >     previous type temp (0xdead9eef != 0xdeadbeef)
> > 
> > Something severe? Hardware/RAM problem?
> 
> Probably a software bug.... I see a similar message if I bring my firewall
> up and down a few times (ip filter...) on NetBSD 1.4.1.

Not in this case, I don't think.

0xdead9eef is only one bit (out of 32) away from 0xdeadbeef.  I think
this one's a hardware error -- do you have ECC memory?