kern/57134: fictious disklabel not created on vnd

[martin%NetBSD.org@localhost]

>Number:         57134
>Category:       kern
>Synopsis:       fictious disklabel not created on vnd
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 23 19:35:00 +0000 2022
>Originator:     Martin Husemann
>Release:        NetBSD 10.0_BETA
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD thirdstage.duskware.de 10.0_BETA NetBSD 10.0_BETA (MODULAR) #3: Thu Dec 22 09:34:53 CET 2022 martin%thirdstage.duskware.de@localhost:/usr/src/sys/arch/sparc64/compile/MODULAR sparc64
Architecture: sparc64
Machine: sparc64
>Description:

Some atf tests fail due to newfs failures, e.g. /usr/tests/dev/fss.
It does:

  dd if=/dev/zero of=./image bs=32k count=64
  vndconfig -c vnd0 ./image
  newfs -I vnd0

and that errors out:
newfs: Unable to determine file system size

Disklabel is:

3 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 c:      4096         0     unused      0     0        # (Cyl.      0 -      1)

... so something did not create a fictious label here.

>How-To-Repeat:
s/a

>Fix:
n/a