From owner-freebsd-stable@FreeBSD.ORG  Thu Nov 12 10:36:04 2009
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 104DD1065672
	for <freebsd-stable@freebsd.org>; Thu, 12 Nov 2009 10:36:04 +0000 (UTC)
	(envelope-from freebsd-stable@m.gmane.org)
Received: from lo.gmane.org (lo.gmane.org [80.91.229.12])
	by mx1.freebsd.org (Postfix) with ESMTP id C18408FC13
	for <freebsd-stable@freebsd.org>; Thu, 12 Nov 2009 10:36:03 +0000 (UTC)
Received: from list by lo.gmane.org with local (Exim 4.50) id 1N8X21-00056J-IO
	for freebsd-stable@freebsd.org; Thu, 12 Nov 2009 11:36:01 +0100
Received: from lara.cc.fer.hr ([161.53.72.113])
	by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-stable@freebsd.org>; Thu, 12 Nov 2009 11:36:01 +0100
Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian))
	id 1AlnuQ-0007hv-00
	for <freebsd-stable@freebsd.org>; Thu, 12 Nov 2009 11:36:01 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-stable@freebsd.org
From: Ivan Voras <ivoras@freebsd.org>
Date: Thu, 12 Nov 2009 11:35:48 +0100
Lines: 23
Message-ID: <hdgodr$ug3$1@ger.gmane.org>
References: <20091112103308.GA2536@hiMolde.no>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr
User-Agent: Thunderbird 2.0.0.23 (X11/20090928)
In-Reply-To: <20091112103308.GA2536@hiMolde.no>
Sender: news <news@ger.gmane.org>
Subject: Re: /bin/sh core dumps on FreeBSD 7.2
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 12 Nov 2009 10:36:04 -0000

Hans F. Nordhaug wrote:
> Hi!
> 
> Suddenly /bin/sh started to crash all the time with core dumps. I'm
> running FreeBSD 7.2-RELEASE-p4 (i386) and I have not updated anything
> lately.  The /bin/sh binary seems to be untouched. It might be some
> hardware trouble, but the machine seems to run OK now. (I had to
> replace /bin/sh with a symlink to /rescue/sh.)
> 
> I would like to track down the problem, but running sh I only get
> "Segmentation fault: 11 (core dumped)". I would be happy to run
> gdb and give you a backtrace. Any clues?
> 
> Hans
> 
> PS! I tried to run "freebsd-update IDS" to see if any files are
> broken, but it stops at
> Inspecting system... sha256: ///boot/kernel/utopia.ko.symbols: Input/output error

All of this points to a hardware problem.

I think the best thing you can try is to manually get a hash fingerprint 
of your sh and compare it with another, known good copy.