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wavpack: validate samples size parsed in wavpack_decode_block

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2013-05-17 18:29:15 +02:00
parent 8c34558131
commit ed50673066
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wavpack.c
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@ -796,6 +796,9 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
if (!wc->mkv_mode) {
s->samples = AV_RL32(buf);
buf += 4;
if (s->samples != wc->samples)
return AVERROR_INVALIDDATA;
if (!s->samples) {
*got_frame_ptr = 0;
return 0;