NetBSD Problem Report #41705

From bad@bsd.de  Sun Jul 12 14:46:38 2009
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Date: Sun, 12 Jul 2009 13:49:23 +0000 (UTC)
From: bad@bsd.de
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To: gnats-bugs@gnats.NetBSD.org
Subject: fatal supervisor mode trap after continuing from breakpoint in DDB
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>Number:         41705
>Category:       port-i386
>Synopsis:       after continuing from a breakpoint in DDB the system receives a fatal supervisor mode trap
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 12 14:50:01 +0000 2009
>Originator:     Christoph Badura
>Release:        NetBSD 5.0_STABLE as of 2009-07-02
>Organization:
netbsd bozotic software test labs

>Environment:


System: NetBSD sanctioned-parts-list 5.0_STABLE NetBSD 5.0_STABLE (GENERIC) #0: Thu Jul 2 18:47:45 UTC 2009 root@arbitrary:/m/obj/m/src/sys/arch/i386/compile/GENERIC i386
Architecture: i386
Machine: i386
>Description:

Boot a GENERIC kernel into DDB. Set breakpoint on e.g. cgdattach.
Continue. Continue from the break point.  We'll get:

fatal trap in supervisor mode
trap type 5 code 0 eip c042a5e1 cs 8 eflags 302 cr2 0 ilevel 0

and the system is unresponsive and needs a hardware reset.
>How-To-Repeat:


boot -d
br cgdattach
c
c

>Fix:

Unknown.

>Unformatted:

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