ffmpeg: fix CVE-2023-49501

Buffer Overflow vulnerability in Ffmpeg v.n6.1-3-g466799d4f5 allows a
local attacker to execute arbitrary code via the config_eq_output function
in the libavfilter/asrc_afirsrc.c:495:30 component.

(From OE-Core rev: 873025145d42ffe75d421884160ec299d85d21ef)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2023-49501.patch

@@ -0,0 +1,30 @@
+From 4adb93dff05dd947878c67784d98c9a4e13b57a7 Mon Sep 17 00:00:00 2001
+From: Paul B Mahol <onemda@gmail.com>
+Date: Thu, 23 Nov 2023 14:58:35 +0100
+Subject: [PATCH] avfilter/asrc_afirsrc: fix by one smaller allocation of
+ buffer
+
+CVE: CVE-2023-49501
+
+Upstream-Status: Backport [https://github.com/FFmpeg/FFmpeg/commit/4adb93dff05dd947878c67784d98c9a4e13b57a7]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ libavfilter/asrc_afirsrc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libavfilter/asrc_afirsrc.c b/libavfilter/asrc_afirsrc.c
+index e2359c1..ea04c35 100644
+--- a/libavfilter/asrc_afirsrc.c
++++ b/libavfilter/asrc_afirsrc.c
+@@ -480,7 +480,7 @@ static av_cold int config_eq_output(AVFilterLink *outlink)
+         if (ret < 0)
+             return ret;
+
+-        s->magnitude = av_calloc(s->nb_magnitude, sizeof(*s->magnitude));
++        s->magnitude = av_calloc(s->nb_magnitude + 1, sizeof(*s->magnitude));
+         if (!s->magnitude)
+             return AVERROR(ENOMEM);
+         memcpy(s->magnitude, eq_presets[s->preset].gains, sizeof(*s->magnitude) * s->nb_magnitude);
+--
+2.40.0

meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb

@@ -32,6 +32,7 @@ SRC_URI = " \
     file://CVE-2024-31582.patch \
     file://CVE-2023-50008.patch \
     file://CVE-2024-32230.patch \
+    file://CVE-2023-49501.patch \
 "
 
 SRC_URI[sha256sum] = "8684f4b00f94b85461884c3719382f1261f0d9eb3d59640a1f4ac0873616f968"