kern/38088: reading to/past end of audio CD on ahc0 watchdog reboots my SGI O2

[rafal%netbsd.org@localhost]

>Number:         38088
>Category:       kern
>Synopsis:       reading to/past end of audio CD on ahc0 watchdog reboots my 
>SGI O2
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Feb 23 01:15:00 +0000 2008
>Originator:     rafal%netbsd.org@localhost
>Release:        NetBSD 4.99.54
>Organization:
        Rafal's House of Hackable Hardware
>Environment:
System: NetBSD toaster 4.99.54 NetBSD 4.99.54 (GENERIC32_IP3x) #4: Wed Feb 20 
16:14:45 EST 2008 
rafal@fearless-vampire-killer:/extra/sgimips/obj/sys/arch/sgimips/compile/GENERIC32_IP3x
 sgimips
Architecture: mipseb
Machine: sgimips
>Description:
        Any attempt to run 'cdparanoia' to rip audio CDs on my O2 has produced
        messages like the ones below from cdparanoia, then a watchdog reboot:

 scsi_read error: sector=242157 length=3 retry=0
                 Sense key: 5 ASC: 21 ASCQ: 0
                 Transport error: Illegal SCSI request (rejected by target)
                 System error: Invalid argument
scsi_read error: sector=242157 length=3 retry=0
                 Sense key: 5 ASC: 21 ASCQ: 0
                 Transport error: Illegal SCSI request (rejected by target)
                 System error: Invalid argument

        On the console I see the following messages before the box reboots:

ahc0:Bus Device Reset Message Sent
Inactive SCB in untaggedQ
Inactive SCB on pending list
Inactive SCB on pending list
(repeats a bunch of times before the watchdog reboots the machine)

        This is the 2nd CD of 2 tries that cause the same problem, so
        I suspect it's pretty easy to reproduce.

>How-To-Repeat:
        Run cdparanoia on an CD using the O2's built-in SCSI / CD drive.
        Probably it's sufficient to rip the last track, since the CD in
        the O2 is dog-slow, but I've just let it work while I was going
        on with other stuff.

>Fix:
        Unknown.

>Unformatted:
                Sources of 2/19 ~ 1600 UTC