[Bug 267028] General protection fault kernel panic immediately after kldload amdgpu

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 14 Oct 2022 22:36:56 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=267028

Graham Perrin <grahamperrin@freebsd.org> changed:

           What    |Removed                     |Added
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              Flags|maintainer-feedback?(x11@Fr |
                   |eeBSD.org)                  |
           Keywords|                            |needs-qa

--- Comment #7 from Graham Perrin <grahamperrin@freebsd.org> ---
> … immediately after kldload amdgpu …

(In reply to George Mitchell from comment #0)

If I understand correctly, the attachment shows: 

1. kldload amdgpu whilst in single user mode

2. a subsequent, but non-immediate, exit ^D to multi-user mode

3. panic 


…
ugen0.4: <Logitech USB Optical Mouse> at usbus0
<118>Enter full pathname of shell or RETURN for /bin/sh: Cannot read termcap
database;
<118>using dumb terminal settings.
<118>root@:/ # kldload amdgpu
<6>[drm] amdgpu kernel modesetting enabled.
…
<6>[drm] Initialized amdgpu 3.40.0 20150101 for drmn0 on minor 0
<118>root@:/ # ^D
<118>Setting hostuuid: 032e02b4-0499-0547-c106-430700080009.
<118>Setting hostid: 0x82f0750c.


Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer     = 0x20:0xffffffff80d17870
stack pointer           = 0x28:0xfffffe0075fdda60
frame pointer           = 0x28:0xfffffe0075fdda60
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 52 (kldload)
…

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