kern/60865: NetBSD-current/alpha panics running getcwd test

["Andreas Gustafsson via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60865
>Category:       kern
>Synopsis:       NetBSD-current/alpha panics running getcwd test
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Oct 10 18:35:00 +0000 2026
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date >= 2026.10.02.18.53.54
>Organization:
  
>Environment:
System: NetBSD
Architecture: alpha
Machine: alpha
>Description:

The NetBSD/alpha testbed panics while running the tests:

  lib/libc/gen/t_getcwd (189/1024): 2 test cases
      getcwd_err: [0.023085s] Passed.
      getcwd_fts:
  [ 1809.4939199] CPU 0: fatal kernel trap:

  [ 1809.4939199] CPU 0    trap entry = 0x2 (memory management fault)
  [ 1809.4939199] CPU 0    a0         = 0x0
  [ 1809.4939199] CPU 0    a1         = 0x0
  [ 1809.4939199] CPU 0    a2         = 0xffffffffffffffff
  [ 1809.4939199] CPU 0    pc         = 0x0
  [ 1809.4939199] CPU 0    ra         = 0x0
  [ 1809.4939199] CPU 0    pv         = 0xfffffc0000a67888
  [ 1809.4939199] CPU 0    curlwp     = 0xfffffc000397b9c0
  [ 1809.4939199] CPU 0        pid = 18260, comm = t_getcwd

  [ 1809.4939199] panic: trap
  [ 1809.4939199] cpu0: Begin traceback...
  [ 1809.4939199] at 0xfffffc0000319980 pc 0xfffffc0001185d8c
  [ 1809.4939199] cpu0: End traceback...

  [ 1809.4939199] dumping to dev 4,1 offset 131071

since this commit:

  2026.10.02.18.53.54 riastradh src/sys/conf/Makefile.kern.inc 1.307

Logs:

  https://releng.netbsd.org/b5reports/alpha/commits-2026.10.html#2026.10.02.18.53.54

>How-To-Repeat:

>Fix: