File ffmpeg-4-CVE-2025-63757.patch of Package A_tw-ffmpeg-4

From 95d890bf18e535e1ae5a9e24d801ca021e288804 Mon Sep 17 00:00:00 2001
From: Jonathan Kang <jonathankang@gnome.org>
Date: Thu, 15 Jan 2026 15:28:26 +0800
Subject: [PATCH] swscale/output: Fix integer overflow in
 yuv2ya16_X_c_template()

---
 libswscale/output.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: ffmpeg-4.4.7/libswscale/output.c
===================================================================
--- ffmpeg-4.4.7.orig/libswscale/output.c
+++ ffmpeg-4.4.7/libswscale/output.c
@@ -2191,7 +2191,7 @@ yuv2gbrp_full_X_c(SwsContext *c, const i
         int R, G, B;
 
         for (j = 0; j < lumFilterSize; j++)
-            Y += lumSrc[j][i] * lumFilter[j];
+            Y += lumSrc[j][i] * (unsigned)lumFilter[j];
 
         for (j = 0; j < chrFilterSize; j++) {
             U += chrUSrc[j][i] * chrFilter[j];
@@ -2206,7 +2206,7 @@ yuv2gbrp_full_X_c(SwsContext *c, const i
             A = 1 << 18;
 
             for (j = 0; j < lumFilterSize; j++)
-                A += alpSrc[j][i] * lumFilter[j];
+                A += alpSrc[j][i] * (unsigned)lumFilter[j];
 
             if (A & 0xF8000000)
                 A =  av_clip_uintp2(A, 27);