From 5018103fa32cdf5725e8e1309b9ddf89958910b1 Mon Sep 17 00:00:00 2001
From: rcombs <rcombs@rcombs.me>
Date: Thu, 23 Dec 2021 15:12:44 -0600
Subject: lavfi/drawutils: reject shift-packed formats

Disables x2bgr10/x2rgb10 (which did not behave correctly before).
---
 libavfilter/drawutils.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libavfilter/drawutils.c')

diff --git a/libavfilter/drawutils.c b/libavfilter/drawutils.c
index 6b46f5803d..0965afb03e 100644
--- a/libavfilter/drawutils.c
+++ b/libavfilter/drawutils.c
@@ -105,6 +105,9 @@ int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
             return AVERROR(ENOSYS);
         if (c->plane >= MAX_PLANES)
             return AVERROR(ENOSYS);
+        /* data must either be in the high or low bits, never middle */
+        if (c->shift && ((c->shift + c->depth) & 0x7))
+            return AVERROR(ENOSYS);
         /* strange interleaving */
         if (pixelstep[c->plane] != 0 &&
             pixelstep[c->plane] != c->step)
-- 
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