kern/45887: wsconsctl -w encoding=jp may causes kernel panic.

[tnozaki%NetBSD.org@localhost]

>Number:         45887
>Category:       kern
>Synopsis:       wsconsctl -w encoding=jp may causes kernel panic.
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jan 29 22:20:01 +0000 2012
>Originator:     Takehiko NOZAKI
>Release:        5.99.62
>Organization:
>Environment:
NetBSD  5.99.62 NetBSD 5.99.62 (GENERIC) #1 Mon Jan 30 05:37:07 JST 2012 
root@:/usr/obj.i386/sys/arch/i386/compile/GENERIC i386
>Description:
changing keyboard type by "wsconsctl -w encoding=jp" causes kernel panic.

it seems 5.99.60(201201250340Z) works fine, but latest HEAD get panic and shows 
folloing trace:

# wsconsctl -w encoding=jp
uvm_fault(0xc2802ca8, 0xccf000, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip c09168ab cs 8 eflags 10293 cr2 ccfe12 ilevel 0
panic: trap
cpu0: Begin traceback...
printf_nolog(c0c08aa4,c27da914,c27da914,c09168ab,8,10293,ccfe12,0,c28108f0,c2854e1c)
 at netbsd:printf_nolog
trap_tss() at netbsd:trap_tss
--- trap via task gate ---
c209108c:
cpu0: End traceback...

>How-To-Repeat:
just only type "wsconsctl -w encoding=jp" by root.
>Fix:
N/A