kern/57320: ATF test case kernel/t_magic_symlinks:machine_arch fails on RPI02W/evbarm only

[jspath55%gmail.com@localhost]

>Number:         57320
>Category:       kern
>Synopsis:       ATF test case kernel/t_magic_symlinks:machine_arch fails on RPI02W/evbarm only
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Apr 03 21:20:00 +0000 2023
>Originator:     Jim Spath
>Release:        10.0_BETA
>Organization:
>Environment:
NetBSD apie 10.0_BETA NetBSD 10.0_BETA (GENERIC) #0: Fri Jan 13 19:15:32 UTC 2023  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/evbarm/compile/GENERIC evbarm

>Description:
Automated test framework case kernel/t_magic_symlinks:machine_arch fails on one tested architecture (evbarm) only. Succeeds on other architectures.

Results on failing machine:

# atf-run kernel/t_magic_symlinks:machine_arch
Content-Type: application/X-atf-tps; version="3"

info: atf.version, Automated Testing Framework 0.20 (atf-0.20)
info: tests.root, /usr/tests
[...]
tp-start: 1680556207.977608, kernel/t_magic_symlinks, 1
tc-start: 1680556207.977683, machine_arch
tc-so:Initialized vfs.generic.magiclinks=1
tc-se:cd: can't cd to link
tc-so:Restored vfs.generic.magiclinks=0
tc-end: 1680556208.316461, machine_arch, failed, kernel does not handle magic symlinks properly
tp-end: 1680556208.322627, kernel/t_magic_symlinks
info: time.end, Mon Apr 3 21:10:08 UTC 2023


Results on an aarch64 machine:
[...]
tp-start: 1680556322.15265, kernel/t_magic_symlinks, 1
tc-start: 1680556322.15428, machine_arch
tc-so:Initialized vfs.generic.magiclinks=1
tc-so:Restored vfs.generic.magiclinks=0
tc-end: 1680556322.125354, machine_arch, passed
tp-end: 1680556322.125689, kernel/t_magic_symlinks
info: time.end, Mon Apr 3 21:12:02 UTC 2023


>How-To-Repeat:
Run as root: atf-run kernel/t_magic_symlinks:machine_arch

>Fix:
Unknown.
It seems unrelated to a different PR in the same test area - kern/57319 - though both display messages about failed "cd to link".