shithub: dav1d

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check IntraBC displacement vector

Fixes a overlapping memcpy for
dav1d-fuzzing-data:artifacts/crash-9550bf1d4b851a3a930394df4e2970d4eb50f47e.

--- a/src/decode.c

+++ b/src/decode.c

@@ -1192,6 +1192,8 @@

             printf("Post-dmv[%d/%d,ref=%d/%d|%d/%d]: r=%d\n",

                    b->mv[0].y, b->mv[0].x, ref.y, ref.x,

                    mvlist[0][0].y, mvlist[0][0].x, ts->msac.rng);

+        if (b->mv[0].x >= 0 && b->mv[0].y >= 0)

+            b->mv[0] = ref;

         read_vartx_tree(t, b, bs, bx4, by4);

         // reconstruction