14-stable 7be29291845a bombs on a Lenovo Thinkpad X1 Yoga 3rd gen

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From: Mathias Picker <Mathias.Picker_at_virtual-earth.de>
Date: Tue, 29 Aug 2023 10:34:49 UTC
Hi all,

thanks for all the work in 14.

I just tried the first time building and booting 14-stable.
I used beinstall.sh to install it into a boot environment.

My first try with all klds in loader.conf and rc.conf found a fast 
death:

"--<<BOOT>>--
Copyright (c) 1992-2023 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 14.0-ALPHA3 amd64 1400097 ₩0 
stable/14-n265023-7be29291845a: Mon Aug 26 19:23:28 CEST 2023
mathiasp@danton: /usr/obj/usr/src/and64. amd64/sys/GENERIC and64
FreeBSD clang version 16.0.6 
(https://github.com/llvn/llvn-project.git 
11vmorg-16.0.6-8-g7cbf1a259152)
VT(efifb): resolution 2560x1440
kernel trap 12 uith interrupts disabled
panic: vm_fault_lookup: fault on nofault entry, addr: 
Øxffffffff82be6000
cpuid = 0
time = 1
KDB: stack backtrace:
HO Oxffffffff80b9c39d at kdb_backtrace+0x5d
#1 Oxffffffff80b4eb60 at vpanic+0x130
#2 Øxffffffff80b4ea23 at panic+0x43
#3 0xffffffff8Bec45d5 at vm_fault+0x15c5
#4 0xffffffff80ec2f40 at vm_fault_trap+0xb0
#5 0xffffffff810220d9 at trap_pfault+0x1d9
H6 Oxffffffff8Off7bf8 at calltrap+0x8
₩7 Oxffffffff8037b023 at btext+0x23
Uptime: 1s
Rebooting..

After I removed every kld from loader.conf and rc.conf I got much 
further, but it rebooted before I could take a screenshot.

It bootet into the working (13.2-stable) BE so I do not have a 
core.txt - but since 14-alpha reboots anyway I do not see how to 
get around this.

Dump info says:

Architecture: amd64
  Architecture Version: 2
  Dump Length: 823549952
  Blocksize: 512
  Compression: none
  Dumptime: 2023-08-29 12:25:16 +0200
  Hostname: danton
  Magic: FreeBSD Kernel Dump
  Version String: FreeBSD 14.0-ALPHA3 amd64 1400097 #0 
  stable/14-n265023-7be29291845a: Mon Aug 28 19:23:28 CEST 2023
    mathiasp@danton:/usr/obj/usr/src/amd64.amd64/sys/GENERIC
  Panic String: page fault
  Dump Parity: 3469206344
  Bounds: 5
  Dump Status: good


If vmcore can help, it’s at 
https://media.virtual-earth.de/mathiasp/20230829-vmcore-X1YogaGen3

I have never debugged something like this: looking into the 
handbook Ι would probably need to rebuild with DDB, right?
Ι need this machine now, Ι can rebuild overnight (CESΤ timezone) 
and try ddb tomorrow.

Cheers, Mathias

-- 
Mathias Picker                        
Geschäftsführer
Mathias.Picker@virtual-earth.de

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