From fa8e9d837130cde3d0548b01aa9cb42e60e30a24 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Fri, 28 Jun 2024 16:48:40 +0800
Subject: [PATCH] fix CVE-2023-50010

---
 libavfilter/vf_gradfun.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_gradfun.c b/libavfilter/vf_gradfun.c
index f63128d..da4c01a 100644
--- a/libavfilter/vf_gradfun.c
+++ b/libavfilter/vf_gradfun.c
@@ -92,7 +92,7 @@ static void filter(GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int wi
     for (y = 0; y < r; y++)
         ctx->blur_line(dc, buf + y * bstride, buf + (y - 1) * bstride, src + 2 * y * src_linesize, src_linesize, width / 2);
     for (;;) {
-        if (y < height - r) {
+        if (y + 1 < height - r) {
             int mod = ((y + r) / 2) % r;
             uint16_t *buf0 = buf + mod * bstride;
             uint16_t *buf1 = buf + (mod ? mod - 1 : r - 1) * bstride;
-- 
2.43.0