From 1731c3530bffb876deb9e00dfffdf9841a8412cd Mon Sep 17 00:00:00 2001
From: Luca Barbato <lu_zero@gentoo.org>
Date: Mon, 17 Apr 2017 19:25:35 +0000
Subject: [PATCH] mm: Skip unexpected audio packets

Bug-Id: 1046
CC: libav-stable@libav.org
---
 libavformat/mm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libavformat/mm.c b/libavformat/mm.c
index 16505502fd..a94d2611a2 100644
--- a/libavformat/mm.c
+++ b/libavformat/mm.c
@@ -174,6 +174,12 @@ static int read_packet(AVFormatContext *s,
             return 0;
 
         case MM_TYPE_AUDIO :
+            if (s->nb_streams != 2) {
+                av_log(s, AV_LOG_ERROR,
+                       "Unexpected audio packet, skipping\n");
+                avio_skip(pb, length);
+                return AVERROR_INVALIDDATA;
+            }
             if (av_get_packet(s->pb, pkt, length)<0)
                 return AVERROR(ENOMEM);
             pkt->size = length;