From 72017ea1dcae1cd4f9c3dd68a3c1a9d941c6b02a Mon Sep 17 00:00:00 2001
From: Baptiste Coudurier <baptiste.coudurier@gmail.com>
Date: Mon, 19 Oct 2009 18:55:27 +0000
Subject: check stream index validity in av_program_add_stream_index

Originally committed as revision 20319 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/utils.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/utils.c b/libavformat/utils.c
index 58b3584c1d..4202fc26a2 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -2833,6 +2833,11 @@ void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int i
     AVProgram *program=NULL;
     void *tmp;
 
+    if (idx >= ac->nb_streams) {
+        av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
+        return;
+    }
+
     for(i=0; i<ac->nb_programs; i++){
         if(ac->programs[i]->id != progid)
             continue;
-- 
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