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Date: Wed, 30 Jun 1999 22:25:27 +0700
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Subject: kern/12464: bad reference in struct vm_zone
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>Number:         12464
>Category:       kern
>Synopsis:       bad reference in struct vm_zone
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 30 08:30:01 PDT 1999
>Closed-Date:
>Last-Modified:
>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:
>Unformatted:


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