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pcmdec: check that channels is valid.

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Prevents a division by 0

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-09 20:47:54 +01:00
parent ac7ff0963b
commit b8551f8ea7
1 changed files with 5 additions and 0 deletions
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5
libavcodec/pcm.c
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@ -288,6 +288,11 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
return AVERROR(EINVAL); return AVERROR(EINVAL);
} }
if (avctx->channels == 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
return AVERROR(EINVAL);
}
n = avctx->channels * sample_size; n = avctx->channels * sample_size;
if (n && buf_size % n) { if (n && buf_size % n) {