File ffmpeg-4-CVE-2026-65706.patch of Package A_tw-ffmpeg-4

From b3c7ebc1edc401fd9881277fdfae93f3f24ceb81 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michael@niedermayer.cc>
Date: Sat, 11 Jul 2026 16:46:39 +0200
Subject: [PATCH] avfilter/vf_swaprect: size the temp row buffer for the widest
 plane

Fixes: out of array access
Fixes: 7aj_swaprect_odd17_nv12.nut / 7aj_generate_swaprect_odd17_nv12.py
Fixes: VRAXYvKtmKa8
Found-by: Adrian Junge (vurlo) <adjun37@gmail.com>
(cherry picked from commit a7e38b617b32f996beaa371bbf04b39907d7a527)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavfilter/vf_swaprect.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_swaprect.c b/libavfilter/vf_swaprect.c
index 5d93f51c30..fe007ee5e7 100644
--- a/libavfilter/vf_swaprect.c
+++ b/libavfilter/vf_swaprect.c
@@ -200,6 +200,7 @@ static int config_input(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
     SwapRectContext *s = ctx->priv;
+    int size = 0;

if (!s->w  || !s->h  ||
         !s->x1 || !s->y1 ||
@@ -210,7 +211,16 @@ static int config_input(AVFilterLink *inlink)
     av_image_fill_max_pixsteps(s->pixsteps, NULL, s->desc);
     s->nb_planes = av_pix_fmt_count_planes(inlink->format);

-    s->temp = av_malloc_array(inlink->w, s->pixsteps[0]);
+    for (int p = 0; p < s->nb_planes; p++) {
+        int shift = p == 1 || p == 2 ? s->desc->log2_chroma_w : 0;
+        int width = AV_CEIL_RSHIFT(inlink->w, shift);
+
+        if (width > INT_MAX / s->pixsteps[p])
+            return AVERROR(EINVAL);
+        size = FFMAX(size, width * s->pixsteps[p]);
+    }
+
+    s->temp = av_malloc(size);
     if (!s->temp)
         return AVERROR(ENOMEM);

-- 
2.49.0