<html>
    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - BUG: kernel NULL pointer dereference - supervisor read access in kernel mode"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111415">111415</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>BUG: kernel NULL pointer dereference - supervisor read access in kernel mode
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/AMDgpu
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>dri-devel@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>tseewald@gmail.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=145088" name="attach_145088" title="dmesg of freeze">attachment 145088</a> <a href="attachment.cgi?id=145088&action=edit" title="dmesg of freeze">[details]</a></span>
dmesg of freeze

Distribution: Fedora 30
Kernel: 5.2.8
Mesa: 19.1.4
GPU: RX 560

Problem:
While browsing the internet using Chromium my entire machine froze, it was
completely unresponsive to input but audio continued to play.


Snippet of BUG:

[173497.820810] BUG: kernel NULL pointer dereference, address: 00000000000002b4
[173497.820815] #PF: supervisor read access in kernel mode
[173497.820817] #PF: error_code(0x0000) - not-present page
[173497.820818] PGD 0 P4D 0 
[173497.820822] Oops: 0000 [#1] SMP PTI
[173497.820825] CPU: 2 PID: 21197 Comm: kworker/u8:2 Not tainted
5.2.8-200.fc30.x86_64 #1
[173497.820826] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./Z77 Extreme4, BIOS P2.90 07/11/2013
[173497.820839] Workqueue: events_unbound commit_work [drm_kms_helper]
[173497.820953] RIP: 0010:dc_stream_log+0x6/0xb0 [amdgpu]

See attached dmesg for full message.

Let me know if you need any additional information.</pre>
        </div>
      </p>


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