commit f25db6cb2af08bf971eb0de308e980cf89ce518c
Author: Pierre Willenbrock <pierre@pirsoft.de>
Date:   Sat Oct 18 20:16:00 2008 +0200

    Add guard against physical pages in high mem
    
    Signed-off-by: Pierre Willenbrock <pierre@pirsoft.de>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 9ac73dd..fcdb918 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1088,6 +1088,13 @@ i915_gem_object_get_page_list(struct drm_gem_object *obj)
 			i915_gem_object_free_page_list(obj);
 			return ret;
 		}
+		if (page_to_phys(page) >> 32) {
+			DRM_ERROR("Found physical page address outside "
+				  "of 32bit: %llx\n", page_to_phys(page));
+			ret = -EINVAL;
+			i915_gem_object_free_page_list(obj);
+			return ret;
+		}
 		obj_priv->page_list[i] = page;
 	}
 	return 0;