[Bug 91765] New: SIGSEGV gpu_bo_download

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91765

            Bug ID: 91765
           Summary: SIGSEGV gpu_bo_download
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: andreas.reis at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

On Haswell 4770, drm-intel-nightly, xserver-git & xf86-video-intel-git (at
sna/dri2: Stop trying to attach vblank events to pixmaps). Same setup as in bug
91467.

Was watching a video with mpv on fullscreen (opengl output driver for h.264
10-bit, so afaik no hwdec) and got a message notification (using dunst,
http://knopwob.org/dunst/index.html ). That caused rapid screen flicking with
the crash after a few seconds.

[ 11945.643] (EE) 
[ 11945.646] (EE) Backtrace:
[ 11945.648] (EE) 0: /usr/bin/xorg-server/Xorg (OsSigHandler+0x29) [0x5f16f9]
[ 11945.648] (EE) 1: /usr/lib/libc.so.6 (killpg+0x40) [0x7f5b23a796bf]
[ 11945.652] (EE) 2: /usr/lib/xorg/modules/drivers/intel_drv.so
(gpu_bo_download+0x1c) [0x7f5b1dc17e3c]
[ 11945.652] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so
(download_boxes+0x21) [0x7f5b1dc18121]
[ 11945.652] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so
(_sna_pixmap_move_to_cpu+0x4a2) [0x7f5b1dc2d142]
[ 11945.652] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so
(sna_drawable_move_region_to_cpu+0x9f7) [0x7f5b1dc30157]
[ 11945.653] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so
(sna_poly_fill_rect+0x2ad) [0x7f5b1dc44dad]
[ 11945.653] (EE) 7: /usr/bin/xorg-server/Xorg (damagePolyFillRect+0x82)
[0x558d22]
[ 11945.653] (EE) 8: /usr/bin/xorg-server/Xorg (miPaintWindow+0x20a) [0x5ca3fa]
[ 11945.653] (EE) 9: /usr/bin/xorg-server/Xorg (miHandleValidateExposures+0x88)
[0x5e2338]
[ 11945.653] (EE) 10: /usr/bin/xorg-server/Xorg (miMoveWindow+0x1be) [0x5e256e]
[ 11945.653] (EE) 11: /usr/bin/xorg-server/Xorg (compMoveWindow+0x46)
[0x4f2c76]
[ 11945.653] (EE) 12: /usr/bin/xorg-server/Xorg (ConfigureWindow+0x7ea)
[0x47742a]
[ 11945.654] (EE) 13: /usr/bin/xorg-server/Xorg (ProcConfigureWindow+0x86)
[0x433e76]
[ 11945.654] (EE) 14: /usr/bin/xorg-server/Xorg (Dispatch+0x25f) [0x439a3f]
[ 11945.654] (EE) 15: /usr/bin/xorg-server/Xorg (dix_main+0x3d4) [0x43f7a4]
[ 11945.654] (EE) 16: /usr/lib/libc.so.6 (__libc_start_main+0xf0)
[0x7f5b23a66610]
[ 11945.655] (EE) 17: /usr/bin/xorg-server/Xorg (_start+0x29) [0x424709]
[ 11945.655] (EE) 
[ 11945.655] (EE) Segmentation fault at address 0x96
[ 11945.655] (EE) 
Fatal server error:
[ 11945.655] (EE) Caught signal 11 (Segmentation fault). Server aborting

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