On a host running OpenBSD 7.2 stable, amd64, all updates & patches using vmd I 
have a VM, configured with 1 GB RAM, 40 GB virtual disk, network access direct 
through host bridge0 (FAQ option #4). The VM has also been installed with 
OpenBSD 7.2 stable + patches.

For the first time in my life I wanted to try upgrading to -current. This is 
what happened:

20221118T003040 root@vm2:~# sysupgrade -s 
Fetching from https://cdn.openbsd.org/pub/OpenBSD/snapshots/amd64/
SHA256.sig   100% |*************************************|  2144       00:00    
Signature Verified
INSTALL.amd64 100% |************************************| 43554       00:00    
base72.tgz   100% |*************************************|   332 MB    00:50    
bsd          100% |*************************************| 22479 KB    00:04    
bsd.mp       100% |*************************************| 22584 KB    00:04    
bsd.rd       100% |*************************************|  4547 KB    00:01    
comp72.tgz   100% |*************************************| 75037 KB    00:12    
game72.tgz   100% |*************************************|  2745 KB    00:01    
man72.tgz    100% |*************************************|  7609 KB    00:02    
xbase72.tgz  100% |*************************************| 52858 KB    00:09    
xfont72.tgz  100% |*************************************| 22967 KB    00:04    
xserv72.tgz  100% |*************************************| 14815 KB    00:03    
xshare72.tgz 100% |*************************************|  4573 KB    00:01    
Verifying sets.
Fetching updated firmware.
fw_update: added none; updated none; kept none
Upgrading.
syncing disks... done
vmmci0: powerdown
rebooting...
Using drive 0, partition 3.
Loading......
probing: pc0 com0 mem[638K 1022M a20=on] 
disk: hd0+
>> OpenBSD/amd64 BOOT 3.55
upgrade detected: switching to /bsd.upgrade
|
com0: 115200 baud
switching console to com0
>> OpenBSD/amd64 BOOT 3.55
boot> 
booting hd0a:/bsd.upgrade: 3916484+1643520+3882152+0+704512 
[109+439944+293419]=0xa624a8
entry point at 0xffffffff81001000
Copyright (c) 1982, 1986, 1989, 1991, 1993
        The Regents of the University of California.  All rights reserved.
Copyright (c) 1995-2022 OpenBSD. All rights reserved.  https://www.OpenBSD.org

OpenBSD 7.2-current (RAMDISK_CD) #797: Thu Nov 17 08:26:28 MST 2022
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_CD
real mem = 1056952320 (1007MB)
avail mem = 1020960768 (973MB)
random: good seed from bootblocks
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf36e0 (10 entries)
bios0: vendor SeaBIOS version "1.14.0p0-OpenBSD-vmm" date 01/01/2011
bios0: OpenBSD VMM
acpi at bios0 not configured
cpu0 at mainbus0: (uniprocessor)
fatal protection fault in supervisor mode
trap type 4 code ffffffff rip ffffffff811d7322 cs 8 rflags 10202 cr2 0 cpl e 
rsp ffffffff81a06d10
gsbase 0xffffffff818f7ff0  kgsbase 0x0
panic: trap type 4, code=ffffffff, pc=ffffffff811d7322

The operating system has halted.
Please press any key to reboot.


Note: I tried this a few times with identical results.

Is the snapshot broken?
Or are snapshots not supported on vmd VMs?
Or am I doing something wrong?


dmesg of VM booting in 7.2 stable:

OpenBSD 7.2 (GENERIC) #0: Wed Oct 26 11:26:29 MDT 2022
    r...@syspatch-72-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
real mem = 1056952320 (1007MB)
avail mem = 1007685632 (961MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf36e0 (10 entries)
bios0: vendor SeaBIOS version "1.14.0p0-OpenBSD-vmm" date 01/01/2011
bios0: OpenBSD VMM
acpi at bios0 not configured
cpu0 at mainbus0: (uniprocessor)
cpu0: AMD Ryzen 3 3200U with Radeon Vega Mobile Gfx, 2395.86 MHz, 17-18-01
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,CX8,SEP,PGE,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,PCLMUL,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,MMXX,FFXSR,PAGE1GB,LONG,LAHF,CMPLEG,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA
cpu0: 32KB 64b/line 8-way D-cache, 64KB 64b/line 4-way I-cache, 512KB 64b/line 
8-way L2 cache, 4MB 64b/line 16-way L3 cache
cpu0: smt 0, core 0, package 0
pvbus0 at mainbus0: OpenBSD
pvclock0 at pvbus0
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "OpenBSD VMM Host" rev 0x00
virtio0 at pci0 dev 1 function 0 "Qumranet Virtio RNG" rev 0x00
viornd0 at virtio0
virtio0: irq 3
virtio1 at pci0 dev 2 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio1: address fe:e1:bb:7c:f4:7d
virtio1: irq 5
virtio2 at pci0 dev 3 function 0 "Qumranet Virtio Storage" rev 0x00
vioblk0 at virtio2
scsibus1 at vioblk0: 1 targets
sd0 at scsibus1 targ 0 lun 0: <VirtIO, Block Device, >
sd0: 40960MB, 512 bytes/sector, 83886080 sectors
virtio2: irq 6
virtio3 at pci0 dev 4 function 0 "OpenBSD VMM Control" rev 0x00
vmmci0 at virtio3
virtio3: irq 7
isa0 at mainbus0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns8250, no fifo
com0: console
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (08393079e7c652ee.a) swap on sd0b dump on sd0b


dmesg of host:

OpenBSD 7.2 (GENERIC.MP) #0: Wed Oct 26 12:01:47 MDT 2022
    
r...@syspatch-72-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 7960215552 (7591MB)
avail mem = 7701565440 (7344MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.2 @ 0xde3db000 (43 entries)
bios0: vendor American Megatrends Inc. version "V1.16_P2C10M3_AMILogo" date 
05/30/2022
bios0: Default string AM02
acpi0 at bios0: ACPI 6.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT FIDT SSDT MSDM MCFG HPET UEFI VFCT TPM2 IVRS 
SSDT CRAT CDIT SSDT SSDT SSDT WSMT SSDT
acpi0: wakeup devices GPP0(S4) GPP1(S4) GPP2(S4) GPP3(S4) GPP4(S4) GPP5(S4) 
GPP6(S4) GP17(S4) XHC0(S3) XHC1(S3) GP18(S4)
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Ryzen 3 3200U with Radeon Vega Mobile Gfx, 2395.63 MHz, 17-18-01
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA,IBPB,XSAVEOPT,XSAVEC,XGETBV1,XSAVES
cpu0: 32KB 64b/line 8-way D-cache, 64KB 64b/line 4-way I-cache, 512KB 64b/line 
8-way L2 cache, 4MB 64b/line 16-way L3 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 24MHz
cpu0: mwait min=64, max=64, C-substates=1.1, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: AMD Ryzen 3 3200U with Radeon Vega Mobile Gfx, 2395.51 MHz, 17-18-01
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA,IBPB,XSAVEOPT,XSAVEC,XGETBV1,XSAVES
cpu1: 32KB 64b/line 8-way D-cache, 64KB 64b/line 4-way I-cache, 512KB 64b/line 
8-way L2 cache, 4MB 64b/line 16-way L3 cache
cpu1: smt 1, core 0, package 0
cpu2 at mainbus0: apid 2 (application processor)
cpu2: AMD Ryzen 3 3200U with Radeon Vega Mobile Gfx, 2395.51 MHz, 17-18-01
cpu2: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA,IBPB,XSAVEOPT,XSAVEC,XGETBV1,XSAVES
cpu2: 32KB 64b/line 8-way D-cache, 64KB 64b/line 4-way I-cache, 512KB 64b/line 
8-way L2 cache, 4MB 64b/line 16-way L3 cache
cpu2: smt 0, core 1, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: AMD Ryzen 3 3200U with Radeon Vega Mobile Gfx, 2395.51 MHz, 17-18-01
cpu3: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,RDSEED,ADX,SMAP,CLFLUSHOPT,SHA,IBPB,XSAVEOPT,XSAVEC,XGETBV1,XSAVES
cpu3: 32KB 64b/line 8-way D-cache, 64KB 64b/line 4-way I-cache, 512KB 64b/line 
8-way L2 cache, 4MB 64b/line 16-way L3 cache
cpu3: smt 1, core 1, package 0
ioapic0 at mainbus0: apid 5 pa 0xfec00000, version 21, 24 pins
ioapic1 at mainbus0: apid 6 pa 0xfec01000, version 21, 32 pins
acpimcfg0 at acpi0
acpimcfg0: addr 0xf8000000, bus 0-63
acpihpet0 at acpi0: 14318180 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (GPP0)
acpiprt2 at acpi0: bus 2 (GPP1)
acpiprt3 at acpi0: bus -1 (GPP2)
acpiprt4 at acpi0: bus -1 (GPP3)
acpiprt5 at acpi0: bus -1 (GPP4)
acpiprt6 at acpi0: bus -1 (GPP5)
acpiprt7 at acpi0: bus -1 (GPP6)
acpiprt8 at acpi0: bus 3 (GP17)
acpiprt9 at acpi0: bus 4 (GP18)
acpipci0 at acpi0 PCI0: 0x00000010 0x00000011 0x00000000
acpicmos0 at acpi0
acpibtn0 at acpi0: PWRB
amdgpio0 at acpi0 GPIO uid 0 addr 0xfed81500/0x400 irq 7, 184 pins
dwiic0 at acpi0 I2CC addr 0xfedc4000/0x1000 irq 14
iic0 at dwiic0
tpm0 at acpi0 TPM_: unsupported TPM2 start method 2
acpicpu0 at acpi0: C2(0@400 io@0x414), C1(0@1 mwait), PSS
acpicpu1 at acpi0: C2(0@400 io@0x414), C1(0@1 mwait), PSS
acpicpu2 at acpi0: C2(0@400 io@0x414), C1(0@1 mwait), PSS
acpicpu3 at acpi0: C2(0@400 io@0x414), C1(0@1 mwait), PSS
acpivideo0 at acpi0: VGA_
acpivout0 at acpivideo0: LCD_
cpu0: 2395 MHz: speeds: 2400 1700 1400 MHz
pci0 at mainbus0 bus 0
ksmn0 at pci0 dev 0 function 0 "AMD 17h/1xh Root Complex" rev 0x00
"AMD 17h/1xh IOMMU" rev 0x00 at pci0 dev 0 function 2 not configured
pchb0 at pci0 dev 1 function 0 "AMD 17h PCIE" rev 0x00
ppb0 at pci0 dev 1 function 1 vendor "AMD", unknown product 0x145d rev 0x00: msi
pci1 at ppb0 bus 1
re0 at pci1 dev 0 function 0 "Realtek 8168" rev 0x15: RTL8168H/8111H (0x5400), 
msi, address 00:e0:4c:f4:13:4f
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
ppb1 at pci0 dev 1 function 2 vendor "AMD", unknown product 0x145d rev 0x00: msi
pci2 at ppb1 bus 2
iwm0 at pci2 dev 0 function 0 "Intel AC 7265" rev 0x59, msi
pchb1 at pci0 dev 8 function 0 "AMD 17h PCIE" rev 0x00
ppb2 at pci0 dev 8 function 1 "AMD 17h/1xh PCIE" rev 0x00
pci3 at ppb2 bus 3
amdgpu0 at pci3 dev 0 function 0 "ATI Picasso" rev 0xc5
drm0 at amdgpu0
amdgpu0: msi
azalia0 at pci3 dev 0 function 1 "ATI Radeon Vega HD Audio" rev 0x00: msi
azalia0: no supported codecs
ccp0 at pci3 dev 0 function 2 "AMD 17h/1xh Crypto" rev 0x00
xhci0 at pci3 dev 0 function 3 vendor "AMD", unknown product 0x15e5 rev 0x00: 
msi, xHCI 1.10
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "AMD xHCI root hub" rev 3.00/1.00 
addr 1
"AMD 17h/1xh I2S Audio" rev 0x00 at pci3 dev 0 function 5 not configured
azalia1 at pci3 dev 0 function 6 "AMD 17h/1xh HD Audio" rev 0x00: apic 6 int 30
azalia1: codecs: Realtek ALC269
audio0 at azalia1
ppb3 at pci0 dev 8 function 2 "AMD 17h/1xh PCIE" rev 0x00
pci4 at ppb3 bus 4
ahci0 at pci4 dev 0 function 0 "AMD FCH AHCI" rev 0x61: msi, AHCI 1.3.1
ahci0: port 1: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 1 lun 0: <ATA, FPT310M8SSD256G, HAFE> 
t10.ATA_FPT310M8SSD256G_220913A00335_
sd0: 244198MB, 512 bytes/sector, 500118192 sectors, thin
piixpm0 at pci0 dev 20 function 0 "AMD FCH SMBus" rev 0x61: SMI
iic1 at piixpm0
iic2 at piixpm0
pcib0 at pci0 dev 20 function 3 "AMD FCH LPC" rev 0x51
pchb2 at pci0 dev 24 function 0 "AMD 17h/1xh Data Fabric" rev 0x00
pchb3 at pci0 dev 24 function 1 "AMD 17h/1xh Data Fabric" rev 0x00
pchb4 at pci0 dev 24 function 2 "AMD 17h/1xh Data Fabric" rev 0x00
pchb5 at pci0 dev 24 function 3 "AMD 17h/1xh Data Fabric" rev 0x00
pchb6 at pci0 dev 24 function 4 "AMD 17h/1xh Data Fabric" rev 0x00
pchb7 at pci0 dev 24 function 5 "AMD 17h/1xh Data Fabric" rev 0x00
pchb8 at pci0 dev 24 function 6 "AMD 17h/1xh Data Fabric" rev 0x00
pchb9 at pci0 dev 24 function 7 "AMD 17h/1xh Data Fabric" rev 0x00
isa0 at pcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: SVM/RVI
efifb at mainbus0 not configured
uhub1 at uhub0 port 5 configuration 1 interface 0 "Mitsumi Electric Hub in 
Apple Extended USB Keyboard" rev 1.10/4.10 addr 2
uhidev0 at uhub1 port 3 configuration 1 interface 0 "Mitsumi Electric Apple 
Extended USB Keyboard" rev 1.10/4.10 addr 3
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 6 key codes, country code 13
wskbd0 at ukbd0: console keyboard
uhidev1 at uhub1 port 3 configuration 1 interface 1 "Mitsumi Electric Apple 
Extended USB Keyboard" rev 1.10/4.10 addr 3
uhidev1: iclass 3/0, 3 report ids
uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
ucc0 at uhidev1 reportid 3: 4 usages, 4 keys, enum
wskbd1 at ucc0 mux 1
ugen0 at uhub0 port 6 "Intel Bluetooth" rev 2.00/0.03 addr 4
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (ce453c5ec57e555c.a) swap on sd0b dump on sd0b
iwm0: hw rev 0x210, fw ver 17.3216344376.0, address 5c:e4:2a:07:34:9c
[drm] failed to load ucode RLC_RESTORE_LIST_CNTL(0x11) [drm] psp gfx command 
LOAD_IP_FW(0x6) failed and response status is (0xFFFF300F)
[drm] failed to load ucode RLC_RESTORE_LIST_GPM_MEM(0x12) [drm] psp gfx command 
LOAD_IP_FW(0x6) failed and response status is (0xFFFF000F)
[drm] failed to load ucode RLC_RESTORE_LIST_SRM_MEM(0x13) [drm] psp gfx command 
LOAD_IP_FW(0x6) failed and response status is (0xFFFF000F)
amdgpu0: RAVEN2 3 CU rev 0x09
amdgpu0: 1680x1050, 32bpp
wsdisplay0 at amdgpu0 mux 1: console (std, vt100 emulation), using wskbd0
wskbd1: connecting to wsdisplay0
wsdisplay0: screen 1-5 added (std, vt100 emulation)


Thanks!
Mike

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