NetBSD Problem Report #33642

From lassekliemann@gmx.net  Sat Jun  3 15:48:13 2006
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Date: 3 Jun 2006 15:43:18 -0000
From: lasse-send-pr-2006@plastictree.net (Lasse Kliemann)
Reply-To: lasse-send-pr-2006@plastictree.net
To: gnats-bugs@NetBSD.org
Subject: panic: free dquot isn't
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>Number:         33642
>Category:       kern
>Synopsis:       Sometimes, creating new users and then chowning directories for them, leads to a panic.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jun 03 15:50:00 +0000 2006
>Last-Modified:  Fri Mar 30 14:19:13 +0000 2007
>Originator:     lasse-send-pr-2006@plastictree.net
>Release:        NetBSD 3.0_STABLE, CVS update from May, 3. 2006
>Organization:

>Environment:
NetBSD m-043 3.0_STABLE NetBSD 3.0_STABLE (STARGAZER) #0: Thu May  4 01:02:12 CEST 2006  netbsd@m-043:/bulk/netbsd/src/sys/arch/i386/compile/STARGAZER i386
Architecture: i386
Machine: i386
>Description:
Sometimes, a sequence of commands like the following leads to a panic:

# groupadd test
# useradd -g test -m test
# mkdir /bulk/home/test
# chown test.test /bulk/home/test


panic: free dquot isn't
Stopped in pid 22336.1 (chown) at netbsd:cpu_Debugger+0x4: leave


Mounted partitions:

# mount
/dev/wd0a on / type ffs (noatime, soft dependencies, local)
/dev/raid0f on /var type ffs (noatime, soft dependencies, local)
/dev/raid0e on /usr type ffs (noatime, soft dependencies, local)
/dev/raid0g on /bulk type ffs (noatime, soft dependencies, local, with quotas)
/dev/raid1e on /home type ffs (noatime, soft dependencies, local, with quotas)
kernfs on /kern type kernfs (local)

>How-To-Repeat:

Difficult. Just repeating the above sequence does not always 
lead to a panic. Because this ought to be a production 
machine, I have not conducted extensive tests. I can do so, if 
it is required.

>Fix:

Unknown
>Release-Note:

>Audit-Trail:
From: christos@zoulas.com (Christos Zoulas)
To: gnats-bugs@NetBSD.org, kern-bug-people@netbsd.org,
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Cc: 
Subject: Re: kern/33642: panic: free dquot isn't
Date: Sat, 3 Jun 2006 12:10:28 -0400

 Do you have disk quotas turned on?

 christos


From: "Lasse Kliemann" <lasse-private-2005@plastictree.net>
To: gnats-bugs@NetBSD.org
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org
Subject: Re: kern/33642: panic: free dquot isn't
Date: Sat, 3 Jun 2006 18:34:47 +0200

 >  Do you have disk quotas turned on?

 I believe so. I have

 quota=yes

 in my /etc/rc.conf, and /etc/fstab looks like:

 /dev/wd0a / ffs rw,noatime,softdep 1 1
 /dev/raid0e /usr ffs rw,noatime,softdep 1 2
 /dev/raid0f /var ffs rw,noatime,softdep 1 2
 /dev/raid0g /bulk ffs rw,noatime,softdep,userquota,groupquota 1 2
 /dev/raid1e /home ffs rw,noatime,softdep,userquota,groupquota 1 2
 /dev/raid0a none swap sw,priority=3D0 0 0
 /dev/wd1a none swap sw,priority=3D1 0 0
 kernfs /kern kernfs rw
 procfs /proc procfs rw,noauto


 Or does "disk quotas" mean something special apart from that?


From: christos@zoulas.com (Christos Zoulas)
To: "Lasse Kliemann" <lasse-private-2005@plastictree.net>,
	gnats-bugs@NetBSD.org
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org
Subject: Re: kern/33642: panic: free dquot isn't
Date: Sat, 3 Jun 2006 13:14:39 -0400

 | Or does "disk quotas" mean something special apart from that?

 No, this is exactly what it means. I would guess that the quota
 code has not been tested with all the recent ffs modifications,
 in particular the combination of softdeps with quota might be
 toxic.

 christos

From: Pavel Cahyna <pavel@NetBSD.org>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/33642: panic: free dquot isn't
Date: Sun, 4 Jun 2006 00:22:08 +0200

 > panic: free dquot isn't

 Do you use FFSv1 or FFSv2 ?

From: "Lasse Kliemann" <lasse-private-2005@plastictree.net>
To: gnats-bugs@NetBSD.org
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org
Subject: Re: kern/33642: panic: free dquot isn't
Date: Sun, 4 Jun 2006 12:53:36 +0200

 >  Do you use FFSv1 or FFSv2 ?

 What is the way to determine this? I just did 'newfs' without 
 any fancy options to create these filesystems.

From: Pavel Cahyna <pavel@NetBSD.org>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/33642: panic: free dquot isn't
Date: Sun, 4 Jun 2006 13:18:27 +0200

 On Sun, Jun 04, 2006 at 11:00:07AM +0000, Lasse Kliemann wrote:
 >  >  Do you use FFSv1 or FFSv2 ?
 >  
 >  What is the way to determine this? I just did 'newfs' without 
 >  any fancy options to create these filesystems.

 it is FFSv1 then.

From: "Lasse Kliemann" <lasse-private-2005@plastictree.net>
To: gnats-bugs@NetBSD.org
Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org, lasse-send-pr-2006@plastictree.net
Subject: Re: kern/33642: panic: free dquot isn't
Date: Tue, 6 Jun 2006 15:11:39 +0200

 It happened again today, but this time hours after I created a 
 new account. The panic was not related to chown, but to ksh. 
 I will now switch off softdeps and see if it happens again.

>Unformatted:

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