From bc7e128a6e8e2a79d0ff7cab5e8a799b3ea042ea Mon Sep 17 00:00:00 2001
From: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Date: Sun, 16 Oct 2016 22:42:32 +0200
Subject: westwood_aud: prevent division by zero

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
---
 libavformat/westwood_aud.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libavformat/westwood_aud.c')

diff --git a/libavformat/westwood_aud.c b/libavformat/westwood_aud.c
index 4750167f13..9c2d35cb8a 100644
--- a/libavformat/westwood_aud.c
+++ b/libavformat/westwood_aud.c
@@ -164,6 +164,12 @@ static int wsaud_read_packet(AVFormatContext *s,
         if (ret != chunk_size)
             return AVERROR(EIO);
 
+        if (st->codecpar->channels <= 0) {
+            av_log(s, AV_LOG_ERROR, "invalid number of channels %d\n",
+                   st->codecpar->channels);
+            return AVERROR_INVALIDDATA;
+        }
+
         /* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
         pkt->duration = (chunk_size * 2) / st->codecpar->channels;
     }
-- 
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