port-macppc/56912: curthread broken on macppc?

[martin%NetBSD.org@localhost]

>Number:         56912
>Category:       port-macppc
>Synopsis:       curthread broken on macppc?
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-macppc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 05 10:15:00 +0000 2022
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.98
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD gethsemane.aprisoft.de 9.99.98 NetBSD 9.99.98 (GETHSEMANE) #203: Tue Jul 5 10:20:25 CEST 2022 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/macppc/compile/GETHSEMANE macppc
Architecture: powerpc
Machine: macppc
>Description:

Doing an atf run with todays current and a kernel that has fast softints
disabled I got this panic:

[ 2124.0967046] panic: lock error: Mutex: mutex_vector_exit,755: assertion failed: MUTEX_OWNER(mtx->mtx_owner) == curthread: lock 0x1d240f40 cpu 1 lwp 0x18973340
[ 2124.1267194] cpu1: Begin traceback...
[ 2124.1267194] 0x1d13bd70: at vpanic+0x158
[ 2124.1467307] 0x1d13bda0: at panic+0x50
[ 2124.1467307] 0x1d13bde0: at lockdebug_abort+0xe4
[ 2124.1567349] 0x1d13be00: at mutex_spin_exit+0x104
[ 2124.1767447] 0x1d13be10: at pipe_write+0x280
[ 2124.1867495] 0x1d13be60: at dofilewrite+0x8c
[ 2124.1967549] 0x1d13beb0: at syscall+0x350

db{1}> ps
PID    LID S CPU     FLAGS       STRUCT LWP *               NAME WAIT
29992 29992 3   0     40180           1d76b100                 dd pipe_rd
2808 > 2808 7   1   1040100           18973340             h_intr
15790 15790 3   1       180           1f231640                 sh wait
10309 10309 3   1       180           1b75e700               tail kqueue
[..]
0        4 1   0       200           5fb29640          softbio/0
0        3 1   0       200           5fb29340          softnet/0
0    >   2 1   0       201           5fb29040             idle/0
0        0 3   1       200             c19d40            swapper uvm



>How-To-Repeat:
s/a

>Fix:
n/a