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vorbisdec: reject rangebits 0 with non-0 partitions

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This causes non-unique elements in floor_setup->data.t1.list, which
makes the stream undecodable according to the specification.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2016-01-03 19:11:24 +01:00
parent e1c5170c63
commit e7a7b3135a
1 changed files with 5 additions and 0 deletions
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5
libavcodec/vorbisdec.c
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@ -573,6 +573,11 @@ static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
return AVERROR(ENOMEM); return AVERROR(ENOMEM);
rangebits = get_bits(gb, 4); rangebits = get_bits(gb, 4);
if (!rangebits && floor_setup->data.t1.partitions) {
av_log(vc->avctx, AV_LOG_ERROR,
"A rangebits value of 0 is not compliant with the Vorbis I specification.\n");
return AVERROR_INVALIDDATA;
}
rangemax = (1 << rangebits); rangemax = (1 << rangebits);
if (rangemax > vc->blocksize[1] / 2) { if (rangemax > vc->blocksize[1] / 2) {
av_log(vc->avctx, AV_LOG_ERROR, av_log(vc->avctx, AV_LOG_ERROR,