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Fix potential overread in vmd audio decoder.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Laurent Aimar 2011-09-24 23:16:17 +02:00 committed by Michael Niedermayer
parent eae3cf06a5
commit 00cbe9e405
1 changed files with 4 additions and 1 deletions
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5
libavcodec/vmdav.c
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@ -523,7 +523,10 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx,
silent_chunks = 0; silent_chunks = 0;
if (block_type == BLOCK_TYPE_INITIAL) { if (block_type == BLOCK_TYPE_INITIAL) {
uint32_t flags = AV_RB32(buf); uint32_t flags;
if (buf_size < 4)
return -1;
flags = AV_RB32(buf);
silent_chunks = av_popcount(flags); silent_chunks = av_popcount(flags);
buf += 4; buf += 4;
buf_size -= 4; buf_size -= 4;