port-powerpc/57098: KASSERT firing on macppc: rw lock not held in trap?

[martin%NetBSD.org@localhost]

>Number:         57098
>Category:       port-powerpc
>Synopsis:       KASSERT firing on macppc: rw lock not held in trap?
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-powerpc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 06 16:35:00 +0000 2022
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.108
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD gethsemane.aprisoft.de 9.99.108 NetBSD 9.99.108 (GETHSEMANE) #229: Tue Dec 6 12:33:26 CET 2022 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/macppc/compile/GETHSEMANE macppc
Architecture: powerpc
Machine: macppc
>Description:

While running ATF tests on a dual G4 macppc:

[ 9110.7294796] panic: kernel diagnostic assertion "uobj == NULL || rw_lock_held(uobj->vmobjlock)" failed: file "../../../../uvm/uvm_page.c", line 2073 
[ 9110.7495000] cpu1: Begin traceback...
[ 9110.7594993] 0x1bdf6c80: at vpanic+0x158
[ 9110.7694978] 0x1bdf6cb0: at kern_assert+0x60
[ 9110.7795031] 0x1bdf6cf0: at uvm_pagereadonly_p+0xe0
[ 9110.7895118] 0x1bdf6d10: at uvm_fault_internal+0x1408
[ 9110.7995214] 0x1bdf6e60: at trap+0x164
[ 9110.8095283] 0x1bdf6f20: user ISI trap by 0xfdc02de8: srr1=0x4000d032
[ 9110.8195242]             r1=0xffffd670 cr=0x24028422 xer=0x20000000 ctr=0xfdc02de8
[ 9110.8395417] cpu1: End traceback...

Stopped in pid 27240.27240 (sh) at      netbsd:vpanic+0x15c:    or      r3, r26,
 r26



>How-To-Repeat:
n/a

>Fix:
n/a