wpa_supplicant triggered memory modified after free

I got hungry and wanted some more dogfood, so I upgraded my laptop to
-CURRENT.  Trying to use wpa_suplicant triggers the following panic:
Memory modified after free 0xc339c900(124) val=ff _at_ 0xc339c900
panic: Most recently used by gbde

Not using WPA is no problem, so I wonder what gbde has to do with it.
Backtrace at http://people.freebsd.org/~erwin/wpa.panic

-erwin

-- 
Erwin Lansing                                     http://droso.org
Security is like an onion.          (o_ _o)
It's made up of several layers   \\\_\   /_///    erwin_at_FreeBSD.org
And it makes you cry.            <____) (____>    erwin_at_aauug.dk