kern/48119: /dev/random kernel crash

[brad.harder%gmail.com@localhost]

>Number:         48119
>Category:       kern
>Synopsis:       /dev/random kernel crash
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 13 20:55:00 +0000 2013
>Originator:     brad harder
>Release:        -current/amd64
>Organization:
method logic digital
>Environment:
NetBSD kamloops 6.99.23 NetBSD 6.99.23 (GENERIC) #284: Mon Aug 12 13:04:28 PDT 
2013  root@kamloops:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
>Description:
dd if=/dev/random bs=8192 count=99  | sed 's,[^a-zA-Z0-9],,' panics kernel.

Once it happened "spontaneously", next try, issuing ^C caused the kernel to 
panic/reboot.


>How-To-Repeat:
dd if=/dev/random bs=8192 count=99 | sed 's/[^a-zA-Z0-9]//g'

>Fix: