From bp@butya.kz Wed Jun 30 08:25:48 1999
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Date: Wed, 30 Jun 1999 22:25:27 +0700
From: bp@butya.kz
Reply-To: bp@butya.kz
To: FreeBSD-gnats-submit@freebsd.org
Subject: bad reference in struct vm_zone
X-Send-Pr-Version: 3.2

>Number:         12464
>Category:       kern
>Synopsis:       bad reference in struct vm_zone
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 30 08:30:01 PDT 1999
>Closed-Date:    Sat Jan 12 06:55:58 PST 2002
>Last-Modified:  Sat Jan 12 07:01:27 PST 2002
>Originator:     Boris Popov
>Release:        FreeBSD 3.2-STABLE i386
>Organization:
none
>Environment:

	3.x and 4.x

>Description:

	Name of vm-zone passed to zinit(). In 'nfs.ko' module zone name located
in static KLD's memory. This causes problems after KLD is unloaded because
'zname' now points to an invalid memory region.

>How-To-Repeat:

	kldload nfs.ko
	sysctl vm.zone /* that works now */
	kldunload nfs.ko
	sysctl vm.zone /* and now we got a panic */

>Fix:
	
	Not sure, but probably pointer to zname should be allocated
dynamically or, better have something like zuninit() function.


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->bp 
Responsible-Changed-By: mike 
Responsible-Changed-When: Fri Jul 20 16:13:08 PDT 2001 
Responsible-Changed-Why:  

Assigning to Boris Popov <bp@FreeBSD.org>.  Boris, this is still a 
problem in 5.0-CURRENT.  Could you take a shot at fixing it. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=12464 
Responsible-Changed-From-To: bp->bugs 
Responsible-Changed-By: bp 
Responsible-Changed-When: Mon Dec 31 11:49:39 PST 2001 
Responsible-Changed-Why:  
Probably someone with more VM knowledge can do it properly. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=12464 
Responsible-Changed-From-To: bugs->freebsd-bugs 
Responsible-Changed-By: mikeh 
Responsible-Changed-When: Mon Jan 7 13:10:13 PST 2002 
Responsible-Changed-Why:  
Misfiled. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=12464 

From: Sheldon Hearn <sheldonh@starjuice.net>
To: bp@FreeBSD.org
Cc: bug-followup@freebsd.org
Subject: Re: kern/12464: bad reference in struct vm_zone 
Date: Fri, 11 Jan 2002 17:43:29 +0200

 On Mon, 31 Dec 2001 11:54:05 PST, bp@FreeBSD.org wrote:
 
 > Responsible-Changed-From-To: bp->bugs
 > Responsible-Changed-By: bp
 > Responsible-Changed-When: Mon Dec 31 11:49:39 PST 2001
 > Responsible-Changed-Why: 
 > Probably someone with more VM knowledge can do it properly.
 
 Did you show this one to dillon?
 
 Ciao,
 Sheldon.

From: Boris Popov <bp@freebsd.org>
To: Sheldon Hearn <sheldonh@starjuice.net>
Cc: bug-followup@freebsd.org
Subject: Re: kern/12464: bad reference in struct vm_zone 
Date: Fri, 11 Jan 2002 22:25:16 +0600 (ALMT)

 On Fri, 11 Jan 2002, Sheldon Hearn wrote:
 
 > > Responsible-Changed-From-To: bp->bugs
 > > Responsible-Changed-By: bp
 > > Responsible-Changed-When: Mon Dec 31 11:49:39 PST 2001
 > > Responsible-Changed-Why: 
 > > Probably someone with more VM knowledge can do it properly.
 > 
 > Did you show this one to dillon?
 
 	Can't remember, but des@ probably was informed.
 
 -- 
 Boris Popov
 http://rbp.euro.ru
 
State-Changed-From-To: open->closed 
State-Changed-By: des 
State-Changed-When: Sat Jan 12 06:55:58 PST 2002 
State-Changed-Why:  
This was fixed with the introduction of zdestroy last August. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=12464 
>Unformatted:
