drm: Return EINVAL on duplicate objects in execbuffer object list
If userspace passes an object list with the same object appearing more
than once, we end up hitting the BUG_ON() in
i915_gem_object_set_to_gpu_domain() as it gets called a second time
for the same object.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 17fa408..9186d43 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -457,6 +457,12 @@
/** for phy allocated objects */
struct drm_i915_gem_phys_object *phys_obj;
+
+ /**
+ * Used for checking the object doesn't appear more than once
+ * in an execbuffer object list.
+ */
+ int in_execbuffer;
};
/**