This failed for unknown reason; the second time through I got that message. I'm looking for any suggestions on how to proceed.
Timeline: Checked for syspatch (none needed) and rebooted the VM. I ran sysupgrade on a VM patched for all 6.8 patches. It was normal: ...snip... xshare69.tgz 100% |***************************************| 4502 KB 00:03 Verifying sets. Fetching updated firmware. Upgrading. Connection to s closed by remote host. Connection to s closed. When time came to ssh back in, "connection refused". Start the console and see: n# vmctl console 1 Connected to /dev/ttyp2 (speed 115200) s# ? sh: ?: not found s# exit erase ^?, werase ^W, kill ^U, intr ^C, status ^T Welcome to the OpenBSD/amd64 6.9 installation program. Starting non-interactive mode in 5 seconds... (I)nstall, (U)pgrade, (A)utoinstall or (S)hell? U As if installation had not proceeded. So I reran upgrade, which ran normally, until Installing xserv69.tgz 100% |**************************| 18351 KB 00:10 Location of sets? (disk http nfs or 'done') [done] done Location of sets? (disk http nfs or 'done') [done] done Making all device nodes... done. Relinking to create unique kernel...ksh(57788) in malloc(): write after free 0x2b1 33f000 init: single user shell terminated, restarting erase ^?, werase ^W, kill ^U, intr ^C, status ^T Welcome to the OpenBSD/amd64 6.9 installation program. (I)nstall, (U)pgrade, (A)utoinstall or (S)hell? s See guest dmesg below. Host is running 6.8 but missing patches from 018_xi and after. s# dmesg OpenBSD 6.9 (RAMDISK_CD) #456: Mon Apr 19 10:47:37 MDT 2021 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/RAMDISK_CD real mem = 520085504 (495MB) avail mem = 500359168 (477MB) random: good seed from bootblocks mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf3f40 (10 entries) bios0: vendor SeaBIOS version "1.11.0p3-OpenBSD-vmm" date 01/01/2011 bios0: OpenBSD VMM acpi at bios0 not configured cpu0 at mainbus0: (uniprocessor) cpu0: AMD E-350 Processor, 1597.31 MHz, 14-01-00 cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,CX8,SEP,PGE,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,SSSE3,CX16,POPCNT,HV,NXE,MMXX,FFXSR,PAGE1GB,LONG,LAHF,CMPLEG,EAPICSP,AMCR8 ,ABM,SSE4A,MASSE,3DNOWP,IBS,SKINIT,ITSC cpu0: 32KB 64b/line 2-way I-cache, 32KB 64b/line 8-way D-cache, 512KB 64b/line 16- way L2 cache cpu0: 8 4MB entries fully associative cpu0: DTLB 40 4KB entries fully associative, 8 4MB entries fully associative pvbus0 at mainbus0: OpenBSD 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:d1:30:65 virtio1: irq 5 virtio2 at pci0 dev 3 function 0 "Qumranet Virtio Storage" rev 0x00 vioblk0 at virtio2 scsibus0 at vioblk0: 1 targets sd0 at scsibus0 targ 0 lun 0: <VirtIO, Block Device, > sd0: 12288MB, 512 bytes/sector, 25165824 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 com0 at isa0 port 0x3f8/8 irq 4: ns8250, no fifo com0: console softraid0 at root scsibus1 at softraid0: 256 targets root on rd0a swap on rd0b dump on rd0b WARNING: CHECK AND RESET THE DATE! (the date was current) Disk config before sysupgrade: s# df -h Filesystem Size Used Avail Capacity Mounted on /dev/sd0a 145M 82.0M 55.9M 59% / /dev/sd0g 8.2G 1.8G 6.1G 22% /home /dev/sd0d 118M 8.0K 112M 0% /tmp /dev/sd0f 2.7G 1.9G 747M 72% /usr /dev/sd0e 184M 69.0M 106M 39% /var