[Bug 208825] New: lspci triggers NULL pointer dereference on AMD Renoir 4800H/5600M laptop

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=208825

            Bug ID: 208825
           Summary: lspci triggers NULL pointer dereference on AMD Renoir
                    4800H/5600M laptop
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.8.0
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: jontourville at me.com
        Regression: No

Created attachment 290791
  --> https://bugzilla.kernel.org/attachment.cgi?id=290791&action=edit
lspci triggers NULL pointer dereference on AMD Renoir laptop

Running Arch Linux with 5.8.0 kernel built from linux-mainline on a Dell G5 15
SE 5505 laptop with a AMD 4800H Renoir APU and 5600M discrete GPU.

On a fresh install of Arch, running lspci triggers an oops and NULL pointer
dereference. The oops is not triggered if the kernel is booted with
amdgpu.runpm=0, so it appears to be power management-related. The oops kicks
off with the following errors (full dmesg and lspci -vvv output attached):

[   93.485414] [drm] PCIE GART of 512M enabled (table at 0x0000008000000000).
[   93.485452] [drm] PSP is resuming...
[   93.514696] [drm] reserve 0x900000 from 0x800f400000 for PSP TMR
[   93.684656] amdgpu 0000:03:00.0: amdgpu: RAS: optional ras ta ucode is not
available
[   93.704673] amdgpu: SMU is resuming...
[   95.835970] amdgpu: failed send message:     RunBtc (58)     param:
0x00000000 response 0xffffffc2
[   95.835971] amdgpu: RunBtc failed!
[   95.836016] [drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of
IP block <smu> failed -62
[   95.836053] [drm:amdgpu_device_resume [amdgpu]] *ERROR*
amdgpu_device_ip_resume failed (-62).
[   95.851331] snd_hda_intel 0000:03:00.1: refused to change power state from
D3hot to D0
[   95.956286] snd_hda_intel 0000:03:00.1: CORB reset timeout#2, CORBRP = 65535

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