[Bug 295267] bhyve: Cannot start any VM anymore (Abort trap)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295267

            Bug ID: 295267
           Summary: bhyve: Cannot start any VM anymore (Abort trap)
           Product: Base System
           Version: 15.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bhyve
          Assignee: virtualization@FreeBSD.org
          Reporter: jbo@FreeBSD.org

Host: amd64, stable/15 (commit 87b18b611ec9a70347fdd239345fa23977bcb2d0)
Guest: Any Linux or Windows I have tried

Firing up bhyve like this:

bhyve \
        -A \
        -H \
        -P \
        -S \
        -c cpus=8,sockets=1,cores=8 \
        -m 32G \
        -l com1,stdio \
        -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd \
        -s 0:0,hostbridge \
        -s 1:0,lpc \
        -s 2:0,virtio-net,tap0 \
        -s 3:0,virtio-blk,/dev/zvol/zroot/vm/linuxmint1/disk0 \
        -s 29,fbuf,tcp=0.0.0.0:5900,w=1920,h=1080 \
        -s 7:0,passthru,70/0/0 \
        linuxmint1


Results in:

fbuf frame buffer base: 0x3f7f35800000 [sz 33554432]
vm exit[0]
        reason          SVM
        rip             0x000000000000fff0
        inst_length     0
        exitcode        0x400
        exitinfo1       0x10000001d
        exitinfo2       0xfffff000
Abort trap


None of the VMs I am managing through sysutils/vm-bhyve boot either.

Which kind of information can I provide to help tracking this down?

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