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Date: Fri, 10 Sep 2004 13:15:26 -0400 (EDT)
From: Robert Watson <rwatson@freebsd.org>
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To: John-Mark Gurney <gurney_j@resnet.uoregon.edu>
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cc: Marian Cerny <jojo@matfyz.cz>
cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
cc: freebsd-current@freebsd.org
Subject: Re: LOR (re0 and user map) + PANIC
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On Fri, 10 Sep 2004, John-Mark Gurney wrote:

> Marian Cerny wrote this message on Fri, Sep 10, 2004 at 12:22 +0200:
> > Heh, I noticed one more LOR. This one happens when I turn the laptop off
> > using 'halt -p' after syncing disks. It's *hand*-rewritten, because the
> > laptop turned itself off after 10 seconds, despite the fact, that I was
> > inside kernel debugger (I took a shot with my digital photo camera).
> > 
> > lock order reversal
> >  1st 0xc177b6e8 re0 (network driver) @ /usr/src/sys/dev/re/if_re.c:1752
> >  2nd 0xc08adee4 user map (user map) @ /usr/src/sys/vm/vm_map.c:2997
> 
> What version of if_re.c are you running?  neither RELENG_5 nor HEAD has
> a lock on line 1752. 

While this would be useful to know, the actual bug (per my earlier e-mail)
is a NULL pointer deref:

> > --- trap 0xc, eip = 0xc0575b76, esp = 0xceef9cc0, ebp = 0xceef9cdc ---
> > re_rxeof(c177b000) at re_rxeof+0x2ae

It would be very useful to know the revision of the file, as well as what
line in the code re_rxeof+0x2ae is.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert@fledge.watson.org      Principal Research Scientist, McAfee Research