gen6_mfd: Check ptr before dereferencing

intel · Sep 4, 2017 · a6039cb · a6039cb
1 parent a621318
commit a6039cb
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/src/gen6_mfd.c b/src/gen6_mfd.c
@@ -1619,10 +1619,11 @@ gen6_mfd_vc1_pred_pipe_state(VADriverContextP ctx,
     if (gen6_mfd_context->reference_surface[0].surface_id != VA_INVALID_ID) {
         if (picture_type == 1 || picture_type == 2) { /* P/B picture */
             struct gen6_vc1_surface *gen6_vc1_surface = gen6_mfd_context->reference_surface[0].obj_surface->private_data;
-
-            intensitycomp_single_fwd = gen6_vc1_surface->intensity_compensation;
-            luma_scale1 = gen6_vc1_surface->luma_scale;
-            luma_shift1 = gen6_vc1_surface->luma_shift;
+            if (gen6_vc1_surface) {
+                intensitycomp_single_fwd = gen6_vc1_surface->intensity_compensation;
+                luma_scale1 = gen6_vc1_surface->luma_scale;
+                luma_shift1 = gen6_vc1_surface->luma_shift;
+            }
         }
     }