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avformat/wavdec: Check chunk_size

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Fixes integer overflow and out of array access

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3d23219637)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
李赞 2017-05-10 14:55:34 +02:00 • committed by Michael Niedermayer
parent 5d2ddaa139
commit f58b45f0ac
1 changed files with 2 additions and 0 deletions
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2
libavformat/wavdec.c
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@ -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)