commit d7eb40efa79dd9ea720606b94a20179c7dd18e03
Author: Chris Wilson <[email protected]>
Date:   Wed Sep 25 13:54:43 2013 +0100

    sna: Check that the bo exists before attempting to undo it
    
    Fixes a NULL dereference from sna_blt_composite().
    
    Bugzilla: 
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1228677
    Signed-off-by: Chris Wilson <[email protected]>


** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: New => Fix Committed

** Summary changed:

- Xorg crashed with SIGABRT
+ [needs 2.99.903] Xorg crashed in sna_blt_composite(), kgem_bo_undo()

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https://bugs.launchpad.net/bugs/1228677

Title:
  [needs 2.99.903] Xorg crashed in sna_blt_composite(), kgem_bo_undo()

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