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From: Christian Gusenbauer <c47g@gmx.at>
To: freebsd-current@freebsd.org
Date: Fri, 6 Feb 2009 14:13:52 +0100
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Cc: freebsd-hackers@freebsd.org, Oliver Fromme <olli@lurza.secnetix.de>
Subject: Re: CFT: Graphics support for /boot/loader
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Hi Oliver!

On Friday 06 February 2009, Oliver Fromme wrote:
> Danny Braniss wrote:
>  > just tried it via pxe:
>  >
>  > panic: free: guard1 @ 0x7f3a4aec from /usr/src/lib/libstand/close.c:79
>  >
>  > what changes are needed in pxeboot?
>
> The panic message means that the heap memory was corruped.
> It could be caused by a buffer overflow or similar.
> I'll try to look into it.

I got this some years ago when I played with FreeBSD 6.1. It has something to 
do with reading/parsing the loader.conf file. Inserting some dummy lines 
(comments etc.) into loader.conf solves it (at least that's a workaround). As 
I've never seen it again since 6.1 I thought it has already been fixed :-(.

Christian.

>
> When does that message appear?  Could you provide a screen
> shot?
>
> Best regards
>    Oliver