From: Martin Storsjö <martin@martin.st>
Date: Tue, 3 Sep 2013 10:53:23 +0000 (+0300)
Subject: 4xm: Check that the read track value is non-negative
X-Git-Tag: n2.1~57^2~339
X-Git-Url: http://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff_plain/d719981273bc779c7d1e879d88404fd867f93a0e

4xm: Check that the read track value is non-negative

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
---

diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index f003c9c..7a87c36 100644
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -131,6 +131,8 @@ static int parse_strk(AVFormatContext *s,
         return AVERROR_INVALIDDATA;
 
     track = AV_RL32(buf + 8);
+    if (track < 0)
+        return AVERROR_INVALIDDATA;
     if (track + 1 > fourxm->track_count) {
         if (av_reallocp_array(&fourxm->tracks, track + 1, sizeof(AudioTrack)))
             return AVERROR(ENOMEM);