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Date: Tue, 31 Jan 2006 13:38:34 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Kris Kennaway <kris@obsecurity.org>
Message-ID: <20060131213834.GA1080@troutmask.apl.washington.edu>
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Cc: freebsd-current@freebsd.org
Subject: Re: panic: Memory modified after free
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On Tue, Jan 31, 2006 at 04:33:32PM -0500, Kris Kennaway wrote:
> On Tue, Jan 31, 2006 at 01:22:09PM -0800, Steve Kargl wrote:
> > The system is a dual proc Tyan K8S Pro with 12 GB of memory.
> > The kernel is UP.  This was recorded by hand. I have the crash dump.
> > 
> > Memory modified after free 0xffffff02505e0c00(504) val=deadc0dd @
> > 0xffffff02505e0cd0
> > 
> > panic: Most recently used by DEVFS1
> 
> Set up memguard to watch this malloc type in order to obtain useful
> debugging.
> 

OK, I've read the memguard manpage and it says to add

vm.memguard.desc=<memory_type>

to /boot/loader.conf.  Where to I get info for what <memory_type>
actually means?

-- 
Steve