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Date: Tue, 25 Apr 1995 15:48:15 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199504250548.PAA17451@godzilla.zeta.org.au>
To: curt@mofo.emergent.com
Subject: Re: kern/360: filesystem deadlock
Cc: current@FreeBSD.org
Sender: current-owner@FreeBSD.org
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>>Synopsis:       filesystem deadlock trivial to produce

>	the filesystem deadlocks when installing a file to itself.
>	a ktrace shows a strange sequence:

>	at this point, deadlock with ps -l reporting ufslk2
>	
>>How-To-Repeat:

>	cd /tmp
>	cp /etc/termcap .
>	install -c -m 0644 termcap /tmp
>	>lockup<

I think the deadlock was fixed a couple of days ago.

>>Fix:
>	don't install a file to itself.	

I tried it anyway :-).  The mmapping stuff causes the installed copy to be
filled to the correct size with garbage.  No error is detected.

Bruce