port-vax/57839: Reproducable VAX pmap bug

[martin%NetBSD.org@localhost]

>Number:         57839
>Category:       port-vax
>Synopsis:       Reproducable VAX pmap bug
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-vax-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 12 18:10:00 +0000 2024
>Originator:     Martin Husemann
>Release:        NetBSD 10.99.10
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD dead-to-the-world.duskware.de 10.99.10 NetBSD 10.99.10 (DEAD) #19: Wed Jan 10 15:59:25 CET 2024 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/vax/compile/DEAD vax
Architecture: vax
Machine: vax
>Description:

Running the atf test suite crashes the kernel:

[ 2155.0184746] panic: pmap_destroy used pmap
[ 2155.0309698] cpu0: Begin traceback...
[ 2155.0447079] panic: pmap_destroy used pmap
[ 2155.0537111] Stack traceback : 
[ 2155.0611692]          Process is executing in user space.
[ 2155.0684572] cpu0: End traceback...
Stopped in pid 337.337 (t_lwp_create) at        netbsd:vpanic+0x179:    pushl   
$0
db> bt
panic: pmap_destroy used pmap
Stack traceback :
0x8b9b8d40: vpanic+0x179(0x802116e5,0x8b9b8dd8)
0x8b9b8d60: printf_nostamp+0x0(0x802116e5)
0x8b9b8d8c: pmap_kenter_pa+0x0(0x87687d40)
0x8b9b8ddc: uvmspace_free+0x73(0x867d2900)
0x8b9b8e04: uvm_proc_exit+0x53(0x85a09530)
0x8b9b8e28: exit1+0x15b(0x877a6ac0,0,0)
0x8b9b8ed8: sys_exit+0x31(0x877a6ac0,0x8b9b8f54,0x8b9b8f4c)
0x8b9b8f18: syscall+0x126(0x8b9b8fb4)


>How-To-Repeat:

cd /usr/tests/lib/libc/sys && atf-run t_lwp_create 


>Fix:
n/a