From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 25 Feb 2014 14:23:28 +0000 (+0000)
Subject: drm/i915: Reset vma->mm_list after unbinding
X-Git-Tag: v3.15-rc1~51^2~55^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64bf930379ac8097705db7d40602c2aa9ec0d2f4;p=pandora-kernel.git

drm/i915: Reset vma->mm_list after unbinding

In place of true activity counting, we walk the list of vma associated
with an object managing each on the vm's active/inactive list everytime
we call move-to-inactive. This depends upon the vma->mm_list being
cleared after unbinding, or else we run into difficulty when tracking
the object in multiple vm's - we see a use-after free and corruption of
the mm_list.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

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