kern/52600: Recent regression in resize_ffs tests

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         52600
>Category:       kern
>Synopsis:       Recent regression in resize_ffs tests
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 08 08:30:00 +0000 2017
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date >= 2017.10.01.07.18.39
>Organization:

>Environment:
System: NetBSD
Architecture: i386
Machine: i386
>Description:

The test cases

  sbin/resize_ffs/t_grow:grow_16M_v2_32768
  sbin/resize_ffs/t_grow_swapped:grow_16M_v2_8192

started failing with this commit:

  2017.10.01.07.18.39 mlelstv src/sbin/resize_ffs/resize_ffs.c 1.51

on at least i386, amd64, and sparc.

Log output from the latest run is at:

  http://releng.netbsd.org/b5reports/sparc/build/2017.10.06.13.00.57/test.html#sbin_resize_ffs_t_grow_grow_16M_v2_32768
  http://releng.netbsd.org/b5reports/sparc/build/2017.10.06.13.00.57/test.html#sbin_resize_ffs_t_grow_swapped_grow_16M_v2_8192

>How-To-Repeat:

Run the tests.

>Fix: