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

3 years ago · f320722eb5
parent f00079b25c
commit f320722eb5
1 changed files with 2 additions and 0 deletions
--- 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)