[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 #228 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
In kgdb based on the kernel and system crash core file (and related),
it be possible to do a sequence like:

(kgdb) print *found_modules->tqh_first
$51 = {link = {tqe_next = 0xfffff8010175d340, tqe_prev = 0xffffffff81b8e218
<found_modules>}, container = 0xfffff80101918c00, name = 0xffffffff81113803
"cam", version = 1}
(kgdb) print *found_modules->tqh_first->link->tqe_next
$52 = {link = {tqe_next = 0xfffff8010175d300, tqe_prev = 0xfffff8010175d380},
container = 0xfffff80101918c00, name = 0xffffffff811e1b57 "xz", version = 1}
(kgdb) print *found_modules->tqh_first->link->tqe_next->link->tqe_next
$53 = {link = {tqe_next = 0xfffff8010175d2c0, tqe_prev = 0xfffff8010175d340},
container = 0xfffff80101918c00, name = 0xffffffff8123ecdc "acpi", version = 1}
. . .
until the problematical name field is shown (bad
pointer or non-terminated string.

This should allow reporting what the last good name is and
what the failing example looks like.

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