[Bug 210415] New: [amdgpu] constant GPU hangs followed by kernel "BUG" and following kernel oops

[Bug 210415] New: [amdgpu] constant GPU hangs followed by kernel "BUG" and following kernel oops

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210415

            Bug ID: 210415
           Summary: [amdgpu] constant GPU hangs followed by kernel "BUG"
                    and following kernel oops
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.9.11
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: david.alejandro.rubio@gmail.com
        Regression: No

Created attachment 293863
  --> https://bugzilla.kernel.org/attachment.cgi?id=293863&action=edit
dmesg output

I have an RX 480. Every few hours after kernel 5.4 (!) I've been getting random
GPU hangs, and after kernel 5.9, they became not only more frequent, but
afterwards the kernel sent messages like 

Nov 29 15:44:31 reimu kernel: [drm] Bailing on TDR for s_job:34a, as another
already in progress
Nov 29 15:44:31 reimu kernel: BUG: kernel NULL pointer dereference, address:
0000000000000020
Nov 29 15:44:31 reimu kernel: #PF: supervisor write access in kernel mode
Nov 29 15:44:31 reimu kernel: #PF: error_code(0x0002) - not-present page

And an Oops right afterwards
Oops: 0002 [#2] PREEMPT SMP NOPTI

The full dmesg is attached. Kernel is compiled with Archlinux kernel
preferences, but using a kernel directly from kernel.org and compiled with the
modules I need give me the same error.

Attached error.

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[Bug 210415] [amdgpu] constant GPU hangs followed by kernel "BUG" and following kernel oops

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210415

--- Comment #1 from David Rubio (david.alejandro.rubio@gmail.com) ---
This is really been happening for really long, but the now-appearing kernel
oops and BUG prints made me realize it's necessary to post this.
The exact GPU model is MSI RX 480 GAMING X.

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[Bug 210415] [amdgpu] constant GPU hangs followed by kernel "BUG" and following kernel oops

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210415

--- Comment #2 from David Rubio (david.alejandro.rubio@gmail.com) ---
Created attachment 293865
  --> https://bugzilla.kernel.org/attachment.cgi?id=293865&action=edit
lspci -vvv output

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[Bug 210415] [amdgpu] constant GPU hangs followed by kernel "BUG" and following kernel oops

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=210415

--- Comment #3 from David Rubio (david.alejandro.rubio@gmail.com) ---
Created attachment 293867
  --> https://bugzilla.kernel.org/attachment.cgi?id=293867&action=edit
lscpu output

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