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
References: https://bugzilla.opensuse.org/1223437
References: CVE-2023-51794

Fixes: out of array access
Fixes: tickets/10746/poc13ffmpeg

Found-by: Zeng Yunxiang
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavfilter/af_stereowiden.c |    2 ++
 1 file changed, 2 insertions(+)

Index: ffmpeg-4.4.4/libavfilter/af_stereowiden.c
===================================================================
--- ffmpeg-4.4.4.orig/libavfilter/af_stereowiden.c
+++ ffmpeg-4.4.4/libavfilter/af_stereowiden.c
@@ -75,6 +75,8 @@ static int config_input(AVFilterLink *in
 
     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);
