panic: pmap_l2_to_l3: PA out of range, PA: 0x0

Saw this while trying to do buildworld .. which it was for days :

login: root
Password:
Oct  1 21:26:36 ison login[807]: ROOT LOGIN (root) ON ttyu0
Last login: Sun May 15 17:27:43 on ttyu0
FreeBSD 14.0-CURRENT #2 main-n255202-0aef8628458-dirty: Sun May  8 
20:33:55 UTC 2022     root@ison:/usr/obj/usr/src/riscv.riscv64/sys/GENERIC

.
.
.

root@ison:~ # sysctl -a hw.ncpu
hw.ncpu: 8
root@ison:~ # sysctl -a hw.physmem
hw.physmem: 34325733376

root@ison:~ # sysctl -a hw.ncpu | cut -f2 -d\:
  8
root@ison:~ # panic: pmap_l2_to_l3: PA out of range, PA: 0x0
cpuid = 4
time = 1664870924
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x38
kdb_backtrace() at kdb_backtrace+0x2c
vpanic() at vpanic+0x154
panic() at panic+0x2a
pmap_remove_pages() at pmap_remove_pages+0x6c8
vmspace_exit() at vmspace_exit+0xd6
exit1() at exit1+0x4ac
sys_exit() at sys_exit+0x10
do_trap_user() at do_trap_user+0x206
cpu_exception_handler_user() at cpu_exception_handler_user+0x72
--- exception 8, tval = 0
KDB: enter: panic
[ thread pid 18297 tid 100640 ]
Stopped at      kdb_enter+0x4a: sd      zero,0(s1)
db> nt
No such command; use "help" to list available commands
db> bt
Tracing pid 18297 tid 100640 td 0xffffffc11af8a680
kdb_enter() at kdb_enter+0x48
vpanic() at vpanic+0x198
panic() at panic+0x2a
pmap_remove_pages() at pmap_remove_pages+0x6c8
vmspace_exit() at vmspace_exit+0xd6
exit1() at exit1+0x4ac
sys_exit() at sys_exit+0x10
do_trap_user() at do_trap_user+0x206
cpu_exception_handler_user() at cpu_exception_handler_user+0x72
--- exception 8, tval = 0
db>

Anything worth looking at here or just pull the plug?


-- 
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional