kern/48550: panic when accessing CDs

[martin%NetBSD.org@localhost]

>Number:         48550
>Category:       kern
>Synopsis:       panic when accessing CDs
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 25 14:45:00 +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) #222: 
Sat Jan 25 14:34:38 CET 2014 
martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL
 amd64
Architecture: x86_64
Machine: amd64
>Description:

When rebooting with a CD medium inside the CD drive, my kernel panics.

#0  0xffffffff804a6caf in cpu_reboot ()
#1  0xffffffff8066ac82 in vpanic ()
#2  0xffffffff8066ad3d in panic ()
#3  0xffffffff807501f3 in buf_mempoolidx ()
#4  0xffffffff80752b03 in allocbuf ()
#5  0xffffffff80752f2b in geteblk ()
#6  0xffffffff8065d4d2 in readdisklabel ()
#7  0xffffffff80221d4d in cdgetdisklabel ()
#8  0xffffffff80224fd5 in cdopen ()
#9  0xffffffff8065bdba in cdev_open ()
#10 0xffffffff8064343b in spec_open ()
#11 0xffffffff8077967f in VOP_OPEN ()
#12 0xffffffff807691b1 in vn_open ()
#13 0xffffffff8075f224 in do_open ()
#14 0xffffffff8075f378 in do_sys_openat ()
#15 0xffffffff807625d5 in sys_open ()
#16 0xffffffff806842ca in syscall ()
#17 0xffffffff801006a1 in Xsyscall ()

(gdb) p (char*)panicstr
$2 = 0xffffffff80dbe9a0 <scratchstr.10948> "buf mem pool index 12"

>How-To-Repeat:
s/a - dunno what is special, happens every time for me.

>Fix:
n/a