[Bug 199157] New: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[Bug 199157] New: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199157

            Bug ID: 199157
           Summary: BUG: unable to handle kernel NULL pointer dereference
                    at 0000000000000000
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.15.10
          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: kyle.devir@mykolab.com
        Regression: No

Created attachment 274831
  --> https://bugzilla.kernel.org/attachment.cgi?id=274831&action=edit
AMDGPU Display Core NULL pointer dereference bug

Output attached.

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[Bug 199157] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199157

Harry Wentland (harry.wentland@amd.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |harry.wentland@amd.com

--- Comment #1 from Harry Wentland (harry.wentland@amd.com) ---
Can you give details of your HW and attach the entire dmesg log?

In what scenario does the NULL pointer dereference happen?

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[Bug 199157] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199157

--- Comment #2 from Kyle De'Vir (kyle.devir@mykolab.com) ---
Created attachment 274891
  --> https://bugzilla.kernel.org/attachment.cgi?id=274891&action=edit
dmesg log

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[Bug 199157] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199157

--- Comment #3 from Kyle De'Vir (kyle.devir@mykolab.com) ---
GPU-wise, I have an RX580 8GB. This morning, I started to wonder whether the
issue was not even be a driver bug, but actually related to the whole
"Performance Marginality Problem", as my AMD 1600X is one of the CPUs affected
by Ryzen hardware bug. A while ago, I started getting random MCEs, which I
suspected were related to the Ryzen bug. They stopped a while later,
mysteriously... then it was occasional hard-lockups, then this issue. 

I'm trying to save up money for Ryzen 2, so hopefully this issue won't pop up
again.

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[Bug 199157] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199157

--- Comment #4 from Harry Wentland (harry.wentland@amd.com) ---
I have one of the first R7 1700 at home on have only seen the marginality
problem affecting gcc and bash while compiling something multi-threaded. Never
noticed it crashing the kernel.

I think what you see might be a legit issue in DC. Does it happen randomly? On
boot? During normal usage? Gaming? How frequently do you see this?

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[Bug 199157] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=199157

--- Comment #5 from Kyle De'Vir (kyle.devir@mykolab.com) ---
This is the first time I've seen it happening on DC, so I decided to just throw
it up as bug report.

At the time, I was browsing on Firefox Nightly, while listening to some music
with MPV. My desktop is Plasma Shell with KWin on X11, which is heavy on OpenGL
usage. I've been running the git versions of Radeon Profile and Radeon Profile
Daemon, which autostart when Plasma Shell does.

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