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     root at 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: