EFI RT page fault in init pid = 1

I wonder if anyone else has seen such a message at shutdown :



Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x0
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0x7c38f87a
stack pointer           = 0x28:0xfffffe035500bba8
frame pointer           = 0x28:0x5
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         = 1 (init)
rdi: fffffe035500bcd8 rsi: 0000000000000004 rdx: 0000000000000000
rcx: 0000000000000000  r8: 0000000000000000  r9: 0000000000000000
rax: 00000000800b0040 rbx: 0000000000000002 rbp: 0000000000000005
r10: 00000000800b0000 r11: 0000000000000000 r12: fffff80103969000
r13: fffff80101c57140 r14: 0000000000004008 r15: fffff801019895a8
trap number             = 12
EFI RT page fault
acpi0: Powering system off

I have not seen such a thing while the machine was running.

Machine in question is 15.0-CURRENT :

Loading kernel...
/boot/kernel/kernel text=0x1826b8 text=0xd92d38 text=0x437223 
data=0x180+0xe80 data=0x19e1e0+0x461e20 0x8+0x198e70+0x8+0x1bcd67
Loading configured modules...
/boot/kernel/vmm.ko size 0x37e660 at 0x2156000
/etc/hostid size=0x25
/boot/kernel/zfs.ko size 0x6082b8 at 0x24d5000
/boot/kernel/geom_mirror.ko size 0x21428 at 0x2ade000
/boot/entropy size=0x1000
/boot/kernel/cryptodev.ko size 0x8808 at 0x2b01000
staging 0x6b200000 (not copying) tramp 0x6b14b000 PT4 0x6b142000
Start @ 0xffffffff80383000 ...
Loading splash ok
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
---<<BOOT>>---
Copyright (c) 1992-2025 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
         The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 15.0-CURRENT #3 main-n274510-3d0a0dda3a7d-dirty: Thu Jan  2 
01:28:25 GMT 2025
     root@titan:/usr/obj/usr/src/amd64.amd64/sys/GENERIC-NODEBUG amd64
FreeBSD clang version 19.1.5 (https://github.com/llvm/llvm-project.git 
llvmorg-19.1.5-0-gab4b5a2db582)
VT(vga): resolution 640x480
CPU: Intel(R) Xeon(R) CPU E5-2640 v4 @ 2.40GHz (2394.50-MHz K8-class CPU)
   Origin="GenuineIntel"  Id=0x406f1  Family=0x6  Model=0x4f  Stepping=1
 
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
 
Features2=0x7ffefbff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX,F16C,RDRAND>
   AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
   AMD Features2=0x121<LAHF,ABM,Prefetch>
   Structured Extended 
Features=0x21cbfbb<FSGSBASE,TSCADJ,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,PQM,NFPUSG,PQE,RDSEED,ADX,SMAP,PROCTRACE>
   Structured Extended Features3=0x9c000400<MD_CLEAR,IBPB,STIBP,L1DFL,SSBD>
   XSAVE Features=0x1<XSAVEOPT>
   VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr
   TSC: P-state invariant, performance statistics
real memory  = 549739036672 (524272 MB)
avail memory = 535434485760 (510630 MB)
.
.
.
etc



I suspect there are changes recently in the RT EFI world ?



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