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avformat/iff: shrink packets to the initialized data

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Fixes use of uninitialized data
Fixes: msan_uninit-mem_7f65b9788da6_388_24.iff
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-15 01:32:48 +01:00
parent b2361cfb94
commit 2b31a9c613
1 changed files with 2 additions and 0 deletions
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2
libavformat/iff.c
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@ -462,6 +462,8 @@ static int iff_read_packet(AVFormatContext *s,
buf = pkt->data;
bytestream_put_be16(&buf, 2);
ret = avio_read(pb, buf, iff->body_size);
if (ret>=0 && ret < iff->body_size)
av_shrink_packet(pkt, ret + 2);
} else {
av_assert0(0);
}