[Bug 199653] New: [AMDGPU][DC] BUG: unable to handle kernel NULL pointer dereference (trace decoded) - bugzilla-daemon

From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 199653] New: [AMDGPU][DC] BUG: unable to handle kernel NULL pointer dereference (trace decoded)
Date: Tue, 08 May 2018 09:09:59 +0000	[thread overview]
Message-ID: <bug-199653-2300@https.bugzilla.kernel.org/> (raw)

https://bugzilla.kernel.org/show_bug.cgi?id=199653

            Bug ID: 199653
           Summary: [AMDGPU][DC] BUG: unable to handle kernel NULL pointer
                    dereference (trace decoded)
           Product: Drivers
           Version: 2.5
    Kernel Version: drm-next-4.18-wip (agd5f, AMDGPU)
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: marcus.husar@gmail.com
        Regression: No

Created attachment 275827
  --> https://bugzilla.kernel.org/attachment.cgi?id=275827&action=edit
Call trace of crash decoded with decode_stacktrace.sh

kernel: BUG: unable to handle kernel NULL pointer dereference at
00000000000002e4

This happens multiple times a day on my machine. It leads to a complete system
freeze. Yesterday I was lucky and got a stack trace.

It mostly happens browsing the web with Firefox (WebRender enabled, XWayland,
Gnome-Shell) when the cursor moves or rotates. But it can happen anywhere and
anytime.

The used kernel is from branch drm-next-4.18-wip@92fb374 of Alex Deucher, AMD
(agd5f). See: git://people.freedesktop.org/~agd5f/linux.

My machine:
 * Hardware name: Acer Swift SF315-41/Becks_RR, BIOS V1.04 01/09/2018
 * Ryzen Mobile 2500U
 * Firmware: VCN: 1.73 (latest available version)
 * My kernel is tainted because the i2c designware driver emits a warning
during
   boot. This should be unrelated to AMDGPU
   (see attachment i2c_designware_trace.txt).

Please ask if anything else is needed.

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