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dpcm: Round output buffer size up.

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Fixes: CVE-2011-3951

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-01-26 17:04:51 +01:00
parent ddf0c1d86a
commit 92115bb685
1 changed files with 4 additions and 1 deletions
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5
libavcodec/dpcm.c
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@ -205,9 +205,12 @@ static int dpcm_decode_frame(AVCodecContext *avctx, void *data,
av_log(avctx, AV_LOG_ERROR, "packet is too small\n");
return AVERROR(EINVAL);
}
if (out % s->channels) {
av_log(avctx, AV_LOG_WARNING, "channels have differing number of samples\n");
}
/* get output buffer */
s->frame.nb_samples = out / s->channels;
s->frame.nb_samples = (out + s->channels - 1) / s->channels;
if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;