kern/52315: detached scscibus has children

[martin%NetBSD.org@localhost]

>Number:         52315
>Category:       kern
>Synopsis:       detached scscibus has children
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jun 19 18:25:00 +0000 2017
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.1
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD thirdstage.duskware.de 8.99.1 NetBSD 8.99.1 (GENERIC) #11: Mon Jun 19 10:53:45 CEST 2017 martin%thirdstage.duskware.de@localhost:/usr/src/sys/arch/sparc64/compile/GENERIC sparc64
Architecture: sparc64
Machine: sparc64
>Description:

During shutdown of todays kernel:

cd0: detached
atapibus0: detached
sd1: detached
brgphy3: detached
brgphy2: detached
scsibus1: detached
config_detach: detached device scsibus0 has children sd0
Skipping crash dump on recursive panic
panic: config_detach

I have:
scsibus0: waiting 2 seconds for devices to settle...
scsibus1: waiting 2 seconds for devices to settle...
sd0 at scsibus0 target 0 lun 0: <SEAGATE, ST336607LSUN36G, 0307> disk fixed
sd0: 34732 MB, 24622 cyl, 27 head, 107 sec, 512 bytes/sect x 71132959 sectors
sd0: sync (12.50ns offset 62), 16-bit (160.000MB/s) transfers, tagged queueing
sd1 at scsibus0 target 1 lun 0: <SEAGATE, ST336607LSUN36G, 0307> disk fixed
sd1: 34732 MB, 24622 cyl, 27 head, 107 sec, 512 bytes/sect x 71132959 sectors
sd1: sync (12.50ns offset 62), 16-bit (160.000MB/s) transfers, tagged queueing
atapibus0 at atabus0: 2 targets
cd0 at atapibus0 drive 0: <DV-28E-B, , 1.2B> cdrom removable
sd0: 5779 trailing sectors not covered by disklabel
sd0: 5779 trailing sectors not covered by disklabel
sd0: 5779 trailing sectors not covered by disklabel
root on sd0a dumps on sd0b
sd0: 5779 trailing sectors not covered by disklabel
sd0: 5779 trailing sectors not covered by disklabel

and sd1 is not mounted in this configuration.

Backtrace is:

db{1}> mach stack
Window 0 frame64 0x1b1d73800 locals, ins:
0 5 1 0 fffffffffffffffd 73 0 104afba3f
1952eb8 1b1d739f8 1ce8c00 1cea000 4 1ce9f10 1b1d730b1=sp 15cb384=pc:netbsd:panic+0x24
Window 1 frame64 0x1b1d738b0 locals, ins:
1c8c800 104adf058 10484c010 1956b58 0 ffffffffffffffff a 0
1952eb8 10486b3bc 104afba3c 10486b6bc 1952b10 1048a1ab0 1b1d73171=sp 15b1940=pc:
netbsd:config_detach+0x3a0
Window 2 frame64 0x1b1d73970 locals, ins:
1c9b400 195cac0 193a8f0 2 193a8f0 0 0 0
10486b388 c 0 0 10486b3bc 104afba08 1b1d73251=sp 15b3508=pc:netbsd:config_detach_all+0x88
Window 3 frame64 0x1b1d73a50 locals, ins:
1903c90 195cd58 0 1 195cd78 d20 4071d6d8 404128f0
1 194f2d0 19531c8 1ce8920 c 10486b388 1b1d73301=sp 1044d38=pc:netbsd:cpu_reboot+0x1f8
Window 4 frame64 0x1b1d73b00 locals, ins:
ffffffffffffd5e0 40208800 4070fd70 0 0 0 0 404128f0
808 0 1b02a8000 1ce0c00 1ce0d68 1052655e0 1b1d733b1=sp 15ae5c0=pc:netbsd:sys_reb
oot+0x80
...



>How-To-Repeat:

Just try to shutdown this machine ;-)

>Fix:
n/a