kern/40998: cd(4) locks up after recording a CD-RW

[dyoung%ojctech.com@localhost]

>Number:         40998
>Category:       kern
>Synopsis:       cd(4) locks up after recording a CD-RW
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 11 20:15:01 +0000 2009
>Originator:     David Young
>Release:        NetBSD 4.99.73
>Organization:
David Young             OJC Technologies
dyoung%ojctech.com@localhost      Urbana, IL * (217) 278-3933
>Environment:
System: NetBSD elmendorf.ojctech.com 4.99.73 NetBSD 4.99.73 (ojctech.com) #0: 
Fri Oct 31 16:57:55 CST 2008 
dyoung%cuw.ojctech.com@localhost:/u3/dyoung/pristine-nbsd/i386/O/sys/arch/i386/compile/ojctech.com
 i386
Architecture: i386
Machine: i386
>Description:
After blanking, formatting, and recording to the CD-RW in cd0,
processes accessing cd0 hang.  For example, eject hangs in this
state, according to 'ps auxwwl':

root     3041  0.0  0.2  748   864 ttyq1 D+    3:04PM  0:00.03 eject c    0  304
1  4158   0  85  0  748   864 xscmd    D+   ttyq1  0:00.03 eject cd0

>How-To-Repeat:
After initializing a CD-RW with mmcformat -B, mmcformat -O,
and recording a NetBSD release image with

        sudo dd if=a-11-Mar-2009-i386cd.iso of=/dev/rcd0d obs=2k conv=osync

subsequent commands that access the CD-RW drive, such as

        sudo eject cd0

hang.
>Fix:
Unknown.