port-evbmips/59356: erlite3 locks up

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

>Number:         59356
>Category:       port-evbmips
>Synopsis:       erlite3 locks up
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    port-evbmips-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 26 11:15:00 +0000 2025
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date 2025.04.24.12.54.43 + patches
>Organization:
  
>Environment:
System: NetBSD
Architecture: evbmips
Machine: mips64eb
>Description:

Running the ATF tests under NetBSD-current from source date
2025.04.24.12.54.43 with patches as described in PR 59236 on a
Ubiquity EdgeRouter Lite, the system locks up and does not even
respond to a break signal from the serial console.

Here's an example of the output from "atf-run | atf-report" ending
abruptly in the middle of a line:

  bin/sh/t_arith (10/985): 33 test cases
      constants: [9.363242s] Passed.
      do_unary_minus: [5.210813s] Passed.
      do_unary_not: [4.539255s] Passed.
      do_unary_plus: [3.360703s] Passed.
      do_unary_tilde: [2.927630s] Passed.
      elementary_add: [9.342770s] Pass

Another run:

  bin/cp/t_cp (2/985): 10 test cases
      dir_to_dir: [9.053238s] Pass

A third:

  bin/sh/t_arith (10/985): 33 test cases
      constants: [7.761773s] Passed.
      do_unary_minus: [3.690076s] Passed.
      do_unary_not: [3.599972s] Passed.
      do_unary_plus: [2.979974s] Passed.
      do_unary_tilde: [2.181179s] Passed.
      elementary_add: [6.071164s] Passed.
      elementary_div: [4.659961s] Passed.
      elementary_eq: [6.461364s] Passed.
      elementary_ge: [2.090035s] Passed.
      elementary_gt: [5.911229s] Pass

Similar lockups also happen if I try to reinstall the sets
using sysinst in an unpatched versions of -current from
before the January jemalloc update.  For example, using
2025.01.31.12.29.19 sources, while extracting the base set,
the sysinst output stopped at

 22% |*******                            | 49664 KiB  403.00 KiB/s    07:13 ETA 

and again the serial console did not respond to a break.

I have tested using both the original USB stick that came with the
erlite3 and a Kingston DTSE9 8GB, and the lockups happen with both.

>How-To-Repeat:

>Fix: