Panic after update main-n269202-4e7aa03b7076 -> n269230-f6f67f58c19d

Machine had been running:

FreeBSD 15.0-CURRENT #43 main-n269202-4e7aa03b7076: Mon Apr  8 11:19:58 UTC 2024     root@freebeast.catwhisker.org:/common/S4/obj/usr/src/amd64.amd64/sys/GENERIC amd64 1500018 1500018

This was an in-place source update, after updating sources to
main-n269230-f6f67f58c19d.  On reboot (after "make installworld"
completed, I see this on the serial console (copy/pasted):

...
Starting lockd.


Fatal trap 12: page fault while in kernel mode
cpuid = 9; apic id = 09
fault virtual address   = 0x18
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80b208c5
stack pointer           = 0x28:0xfffffe048c204920
frame pointer           = 0x28:0xfffffe048c204960
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1208 (rpc.Starting automountd.
lockd)
rdi: 0000000000000000 rsi: fffff801078b0740 rdx: 0000000000000000
rcx: 000000000000010a  r8: ffffffff818d30f0  r9: 0000000000000000
rax: 0000000000000000 rbx: 00000000Starting powerd.00000018 rbp: fffffe048c204960
r10: 0000000000010000 r11: 0000000000000001 r12: fffff80274e32c18
r13: 000000000000010a r14: fffff80274e32c00 r15: ffffffff812ae38a
trap number             = 12
panic: page fault
cpuid = 9
time = 1712662362
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe048c2045f0
vpanic() at vpanic+0x135/frame 0xfffffe048c204720
panic() at panic+0x43/frame 0xfffffe048c204780
trap_fatal() at trap_fatal+0x40b/frame 0xfffffe048c2047e0
trap_pfault() at trap_pfault+0xa0/frame 0xfffffe048c204850
calltrap() at calltrap+0x8/frame 0xfffffe048c204850
--- trap 0xc, rip = 0xffffffff80b208c5, rsp = 0xfffffe048c204920, rbp = 0xfffffe
048c204960 ---
__mtx_lock_flags() at __mtx_lock_flags+0x45/frame 0xfffffe048c204960
clnt_vc_create() at clnt_vc_create+0x4f4/frame 0xfffffe048c204ab0
local_rpcb() at local_rpcb+0x11b/frame 0xfffffe048c204b50
rpcb_unset() at rpcb_unset+0x24/frame 0xfffffe048c204bb0
svc_tp_create() at svc_tp_create+0xee/frame 0xfffffe048c204c90
sys_nlm_syscall() at sys_nlm_syscall+0x3d0/frame 0xfffffe048c204e00
amd64_syscall() at amd64_syscall+0x158/frame 0xfffffe048c204f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe048c204f30
--- syscall (154, FreeBSD ELF64, nlm_syscall), rip = 0x3f00a2dfd2a, rsp = 0x3f00
96f7168, rbp = 0x3f0096f7230 ---
KDB: enter: panic
[ thread pid 1208 tid 101107 ]
Stopped at      kdb_enter+0x33: movq    $0,0x104eb92(%rip)
db> 


Given suitable clues, I can poke at it a bit -- this is my "build
machine," so it doesn't have critical work to do at the moment.  (I
would normally have powered it down for the day: here's no need for
it to be wasting energy.)

Laptops are still building ports under stable/14 -- something seems
to want the llvm17 port, and they have firefox to build, so they
won't be testing CURRENT/head for a while, yet.

Peace,
david
-- 
David H. Wolfskill                              david@catwhisker.org
Alexey Navalny was a courageous man; Putin has made him a martyr.

See https://www.catwhisker.org/~david/publickey.gpg for my public key.