3771 kmdb hangs when reading an invalid address
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Reviewed by: Jeff Biseda <jbiseda@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Albert Lee <trisk@nexenta.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>