From a525b844d9e454e42c762f8030c23bf56d8ec49c Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sat, 5 Dec 2015 16:08:29 +0100
Subject: [PATCH] avfilter/af_stereotools: check s->length size

Signed-off-by: Paul B Mahol <onemda@gmail.com>
---
 libavfilter/af_stereotools.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavfilter/af_stereotools.c b/libavfilter/af_stereotools.c
index 3c796f5b15..00a0dde281 100644
--- a/libavfilter/af_stereotools.c
+++ b/libavfilter/af_stereotools.c
@@ -110,6 +110,10 @@ static int config_input(AVFilterLink *inlink)
     StereoToolsContext *s = ctx->priv;
 
     s->length = 2 * inlink->sample_rate * 0.05;
+    if (s->length <= 1 && s->length & 1) {
+        av_log(ctx, AV_LOG_ERROR, "sample rate is too small\n");
+        return AVERROR(EINVAL);
+    }
     s->buffer = av_calloc(s->length, sizeof(*s->buffer));
     if (!s->buffer)
         return AVERROR(ENOMEM);