lavfi/drawutils: ensure we can't overflow a component

wayveai · Jan 5, 2022 · f320722 · f320722
1 parent f00079b
commit f320722
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/libavfilter/drawutils.c b/libavfilter/drawutils.c
@@ -112,6 +112,8 @@ int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
         if (depthb && (depthb != db))
             return AVERROR(ENOSYS);
         depthb = db;
+        if (db * (c->offset + 1) > 16)
+            return AVERROR(ENOSYS);
         /* strange interleaving */
         if (pixelstep[c->plane] != 0 &&
             pixelstep[c->plane] != c->step)