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Date: Wed, 16 Jul 2003 10:27:22 +0200
From: neologism@hysteria.sk
Reply-To: neologism@hysteria.sk
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: unionfs && mfs|md crashing machine
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>Number:         54534
>Category:       kern
>Synopsis:       [unionfs] unionfs && mfs|md crashing machine
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    daichi
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jul 16 01:30:16 PDT 2003
>Closed-Date:    Tue Feb 13 06:14:59 GMT 2007
>Last-Modified:  Tue Feb 13 06:14:59 GMT 2007
>Originator:     neologism
>Release:        FreeBSD 4.8-STABLE i386
>Organization:
home user
>Environment:
System: FreeBSD k4-316a 4.8-STABLE FreeBSD 4.8-STABLE #0: Tue Jul 15 15:45:23 CEST 2003 root@k4-316a:/usr/obj/usr/src/sys/VALIA i386


	
>Description:

When I try to use unionfs && mfs|md together it crashes the machine.

>How-To-Repeat:
I did this:

kldload union && kldload md && kldload mfs
disklabel -r -w md0 auto
newfs /dev/md0c
mount -t mfs -s 1000 /tmp/a
mount /cdrom	
mount -t union /tmp/a /cdrom
mount -t union /tmp/a /proc	# this
mount -t union /tmp/a /dist 	# and this might not be necessary -I don't know
vi /cdrom/anyfile
umount /dist
umount /proc
umount /cdrom
umount /tmp/a			# this doesn't work
umount /dev/md0c		# this after while crashes machine

It seems like a unionfs bug.. I haven't investigated it but I'd say unionfs
messes some vfs stuff so it crashes...

>Fix:

I don't know.

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->closed 
State-Changed-By: kris 
State-Changed-When: Thu Jul 17 18:05:52 PDT 2003 
State-Changed-Why:  
Unionfs is documented to be broken 

http://www.freebsd.org/cgi/query-pr.cgi?pr=54534 
State-Changed-From-To: closed->suspended 
State-Changed-By: das 
State-Changed-When: Sun Jan 18 22:38:11 PST 2004 
State-Changed-Why:  
The problem persists, so the correct state for this PR is 'suspended.' 

http://www.freebsd.org/cgi/query-pr.cgi?pr=54534 
Responsible-Changed-From-To: freebsd-bugs->daichi 
Responsible-Changed-By: rodrigc 
Responsible-Changed-When: Sun May 28 20:19:04 UTC 2006 
Responsible-Changed-Why:  
daichi is showing interest in unionfs 

http://www.freebsd.org/cgi/query-pr.cgi?pr=54534 
State-Changed-From-To: suspended->closed 
State-Changed-By: rodrigc 
State-Changed-When: Tue Feb 13 06:14:42 UTC 2007 
State-Changed-Why:  
New unionfs implementation has been committed to RELENG_6 and CURRENT. 
This bug report is only relevant to the previous version of unionfs. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=54534 
>Unformatted:
