[Bug 293911] Windows Guest crashes Host -> Hard reset

From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 18 Mar 2026 21:26:22 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293911

            Bug ID: 293911
           Summary: Windows Guest crashes Host -> Hard reset
           Product: Base System
           Version: 15.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: gspurki@gmail.com

Created attachment 268912
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268912&action=edit
vm-bhyve Windows conf

This only happens with Windows 10 and 11 guests. I don't have any logs because
of the hard reset.

The crash mostly occurs when Windows updates and restarts. The system (host)
freezes for a short time, then performs a hard reset.

I changed the disk_type from nvme to virtio-blk but exactly the same problem,
changed wired_memory="yes" to "no" same problem, happens with windows guest who
have passthru but also without.

That never happens with Linux or BSD Guest even if they have a much higher load
SSD and CPU wise.

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