ffmpeg: fix CVE-2023-51794

Buffer Overflow vulnerability in Ffmpeg v.N113007-g8d24a28d06 allows a
local attacker to execute arbitrary code via the libavfilter/af_stereowiden.c:120:69.

(From OE-Core rev: 248dc3b20971fb95f0ceb2a34959f857c89ae008)

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

meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2023-51794.patch

@@ -0,0 +1,35 @@
+From 50f0f8c53c818f73fe2d752708e2fa9d2a2d8a07 Mon Sep 17 00:00:00 2001
+From: Michael Niedermayer <michael@niedermayer.cc>
+Date: Sat, 23 Dec 2023 04:03:01 +0100
+Subject: [PATCH] avfilter/af_stereowiden: Check length
+
+Fixes: out of array access
+Fixes: tickets/10746/poc13ffmpeg
+
+Found-by: Zeng Yunxiang
+Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
+
+CVE: CVE-2023-51794
+
+Upstream-Status: Backport [https://github.com/ffmpeg/FFmpeg/commit/50f0f8c53c818f73fe2d752708e2fa9d2a2d8a07]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ libavfilter/af_stereowiden.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/libavfilter/af_stereowiden.c b/libavfilter/af_stereowiden.c
+index 7cce1a8..f1a5b10 100644
+--- a/libavfilter/af_stereowiden.c
++++ b/libavfilter/af_stereowiden.c
+@@ -74,6 +74,8 @@ static int config_input(AVFilterLink *inlink)
+
+     s->length = s->delay * inlink->sample_rate / 1000;
+     s->length *= 2;
++    if (s->length == 0)
++        return AVERROR(EINVAL);
+     s->buffer = av_calloc(s->length, sizeof(*s->buffer));
+     if (!s->buffer)
+         return AVERROR(ENOMEM);
+--
+2.40.0

meta/recipes-multimedia/ffmpeg/ffmpeg_5.0.1.bb

@@ -34,6 +34,7 @@ SRC_URI = "https://www.ffmpeg.org/releases/${BP}.tar.xz \
            file://CVE-2023-50008.patch \
            file://CVE-2024-31582.patch \
            file://CVE-2024-31578.patch \
+           file://CVE-2023-51794.patch \
           "
 
 SRC_URI[sha256sum] = "ef2efae259ce80a240de48ec85ecb062cecca26e4352ffb3fda562c21a93007b"