kern/48549: can't mount CDs

[martin%NetBSD.org@localhost]

>Number:         48549
>Category:       kern
>Synopsis:       can't mount CDs
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 24 16:45:00 +0000 2014
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.30
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 6.99.30 NetBSD 6.99.30 (NIGHT-OWL) #221: 
Fri Jan 24 14:03:42 CET 2014 
martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL
 amd64
Architecture: x86_64
Machine: amd64
>Description:

Since upgrading to 6.99.30 I can't mount any CDs/DVDs.

>How-To-Repeat:

# disklabel cd0
disklabel: ioctl DIOCGDINFO: Operation not supported by device
# mount -r -t cd9660 /dev/cd0a /mnt
mount_cd9660: /dev/cd0a on /mnt: Operation not supported by device
# mount -r -t cd9660 /dev/cd0d /mnt
mount_cd9660: /dev/cd0d on /mnt: Operation not supported by device
# modstat
NAME             CLASS      SOURCE     REFS  ADDRESS          SIZE     REQUIRES 
[..]
cd9660           vfs        builtin    0     0                -        -

>Fix:
n/a