[Bug 261083] Accidently reboot VMs after OS Upgrade 12.2 to 13.0

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 10 Jan 2022 11:15:28 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261083

            Bug ID: 261083
           Summary: Accidently reboot VMs after OS Upgrade 12.2 to 13.0
           Product: Base System
           Version: 13.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: yaruta.arkadiy@gmail.com

Hi

After upgrade OS from 12.2 to 13.0 servers starts accidentally reboot.

uname -a
FreeBSD 13.0-RELEASE-p4 FreeBSD 13.0-RELEASE-p4 #0: Tue Aug 24 07:33:27 UTC
2021    
root@amd64-builder.daemonology.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC 
amd64

freebsd-version
13.0-RELEASE-p5

last
boot time                                  Mon Jan 10 12:48
boot time                                  Mon Jan 10 11:34
boot time                                  Mon Jan 10 09:40
boot time                                  Mon Jan 10 08:51

less /etc/fstab
# Device        Mountpoint      FStype  Options Dump    Pass#
#/dev/ada0p2    /               ufs     rw      1       1
#/dev/ada0p3    none            swap    sw      0       0
/dev/gptid/b27e8a97-6e76-11e4-b223-00155d536650     /               ufs     rw 
    1       1
/dev/gptid/b2800231-6e76-11e4-b223-00155d536650     none            swap    sw 
    0       0

less /var/log/messages
Jan 10 11:34:28  kernel: intsmb0 attach returned 6
Jan 10 11:34:28  kernel: lo0: link state changed to UP
Jan 10 12:48:35  syslog-ng[995]: syslog-ng starting up; version='3.35.1'
Jan 10 12:48:35  kernel:
Jan 10 12:48:35  kernel: (c) 1992-2021 The FreeBSD Project.
Jan 10 12:48:35  kernel: (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992,
1993, 1994
Jan 10 12:48:35  kernel: Regents of the University of California. All rights
reserved.
Jan 10 12:48:35  kernel: is a registered trademark of The FreeBSD Foundation.
Jan 10 12:48:35  kernel: 13.0-RELEASE-p4 #0: Tue Aug 24 07:33:27 UTC 2021
Jan 10 12:48:35  kernel: /usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64

Virtual machines running on Hyper-V (2012R2 an 2019 Server). Reboot occurs on
any Hyper-V hosts.
VMs (Gen1) has 1-4 vCPU and 1Gb-7Gb RAM.

Could you recommend the next steps to troubleshoot and resolve the problem?

Thank you.

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