kern/178830: kldload alq then kldunload alq then init 0 makes panic!

[Ali Alizadeh]

>Number: 178830
>Category: kern
>Synopsis: kldload alq then kldunload alq then init 0 makes panic!
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed May 22 12:00:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Ali Alizadeh
>Release: FreeBSD 9.0-RELEASE
>Organization:
PFG Co.
>Environment:
FreeBSD FBSD-SRC 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 ro...@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64

>Description:
if you load alq module
#kldload alq
after that
#kldunload alq
and after that shutdown the system
#init 0 or shutdown -p now or ...
the system will panic!
we have a module which uses alq api's.
MODULE_DEPEND(mymodule, alq, 1, 1, 1)
so when we start mymodule, after that stop it and after that shutdown system, we get panic. from that we found this problem.
>How-To-Repeat:
just type:
#kldload alq
after that
#kldunload alq
and after that shutdown the system
#init 0 or shutdown -p now or ...
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:
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