[Bug 102423] kwin segfaults when Alt+Tabbing with windows thumbnails on AMDGPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102423

            Bug ID: 102423
           Summary: kwin segfaults when Alt+Tabbing with windows
                    thumbnails on AMDGPU
           Product: Mesa
           Version: 17.1
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: leguen.yannick at gmail.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 133806
  --> https://bugs.freedesktop.org/attachment.cgi?id=133806&action=edit
Backtrace of the kwin crash

I use an AMD RX560 with Mesa 17.1.7 and Plasma 5.10.5 (ArchLinux).

When I use the "thumbnails" Alt+Tab style for kwin, sooner or later kwin will
segfault while alt+tabbing.
Without windows thumbnails, everything works ok.

I reported this bug on the KDE bugtracker already :
https://bugs.kde.org/show_bug.cgi?id=383058

But the crash seems to come from the driver.
It happened with previous Mesa 17.1 versions too.

See the backtrace in attachment.

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