[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 #308 from Andriy Gapon <avg@FreeBSD.org> ---
Knowing the approximate step where the problem happens and knowing which
variable gets corrupted, you can break to ddb before the corruption but after
the affected module is loaded and set a hardware watchpoint on the
to-be-corrupted address.

Also, perhaps QUEUE_MACRO_DEBUG could be of some help.
But to me it looks like something writes (32-bit) 7 to a wrong memory location.

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