drm/i915: Assert the vma's active tracking is clear before free

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In looking at a use-after-free on Baytrail, it looks like the VMA's
activity tracking is suspect. Add some asserts to catch freeing the VMA
before we have decoupled all of its i915_gem_active trackers.

References: https://bugs.freedesktop.org/show_bug.cgi?id=101511
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170620124321.1108-3-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>

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This commit is contained in:

Chris Wilson 2017-06-20 13:43:21 +01:00

parent 760a898d80

commit 7a3bc034ed

1 changed files with 7 additions and 2 deletions

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drivers/gpu/drm/i915/i915_vma.c

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