[Bug 267028] kernel panics when booting with both (zfs,ko or vboxnetflt,ko or acpi_wmi.ko) and amdgpu.ko

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267028

--- Comment #95 from George Mitchell <george@m5p.com> ---
Created attachment 240622
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=240622&action=edit
Another crash summary; looks like all the earlier ones

Quick summary: I can't cause this crash on my test setup (amdgpu but no ZFS)
over close to 50 tries.

In more detail: I deleted all ports from my test setup and then added
drm-510-kmod and gpu-firmware-amd-kmod, and (most importantly) gdb.  I then
made many fruitless attempts to reproduce the crash.  Experimentally, I added
"zfs" to my mod_list in /etc/rc.conf and got another instance of the crash
after 11 attempts (see attachment).  This crash looks like all the ones from my
regular setup, but at least it appears to be in the right format to get a
backtrace, etc.

I then took "zfs" out of my mod_list and tried another 20 times to get the
crash to recur.  It did not recur.

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