[Nouveau] [Bug 61947] New: nullpointer dereference causes xorg-server segfault when nouveau DRI driver is loaded

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61947

          Priority: medium
            Bug ID: 61947
          Assignee: nouveau at lists.freedesktop.org
           Summary: nullpointer dereference causes xorg-server segfault
                    when nouveau DRI driver is loaded
          Severity: critical
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jan at jgc.homeip.net
          Hardware: All
            Status: NEW
           Version: 9.1
         Component: Drivers/DRI/nouveau
           Product: Mesa

Created attachment 76086
  --> https://bugs.freedesktop.org/attachment.cgi?id=76086&action=edit
Patch that fixes the segfault

Chromium can crash Xorg when the nouveau DRI driver is loaded. This is due to a
nullpointer dereference.

Archlinux bug (Xorg crash): https://bugs.archlinux.org/task/33994
Fedora bug (Application crash, same cause):
https://bugzilla.redhat.com/show_bug.cgi?id=862466

As suggested in the Fedora bug, comment 15, attached is a patch that fixes this
issue (confirmed on Archlinux). This is the same check the Intel DRI driver
does, so I think it's needed there.

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