From 3d232196372f309a75ed074c4cef30578eec1782 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=E6=9D=8E=E8=B5=9E?= <lizan@ruc.edu.cn>
Date: Wed, 10 May 2017 14:55:34 +0200
Subject: [PATCH] avformat/wavdec: Check chunk_size

Fixes integer overflow and out of array access

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavformat/wavdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index 602ce97530..81dbc9f16e 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -841,6 +841,8 @@ static int w64_read_header(AVFormatContext *s)
                 chunk_key[4] = 0;
                 avio_read(pb, chunk_key, 4);
                 chunk_size = avio_rl32(pb);
+                if (chunk_size == UINT32_MAX)
+                    return AVERROR_INVALIDDATA;
 
                 value = av_mallocz(chunk_size + 1);
                 if (!value)
-- 
2.11.0