Bug in geom_ctl errors handling.

[Pawel Jakub Dawidek]

Hi.

I finally tracked down a bug which I was seeing from time to time.
If you saw 'Bad address' as an result of some geom(8) command, you saw
the bug.

The problem we got here, is that copyout(9) was done not from user
process, but from eg. g_event thread, where address space is different.

Here is the patch to fix it:

	http://people.freebsd.org/~pjd/patches/geom_ctl.c.patch

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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