>   my reading of the kcopy() man page made me think that i could pass it
>   a "src" pointer and a "dst" pointer, and it would return EFAULT if
>   either of the pointers were invalid.
>   
>   instead, i'm getting kernel panics.
>
>sounds like a bug to me.  what platform?  does it happen on others?

my i386 laptop.  haven't tried others.  uiomove() uses kcopy(), which
i expect is used a lot.  i've not yet tried to make uiomove() use
funky pointers like i am, so i don't know if that suffers the same
fate, though i would expect it will.

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