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avformat/vpk: Check offset for validity

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-06-06 23:17:18 +02:00
parent 8c6c4129b4
commit aa003019ab
1 changed files with 3 additions and 0 deletions
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3
libavformat/vpk.c
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@ -66,6 +66,9 @@ static int vpk_read_header(AVFormatContext *s)
return AVERROR_INVALIDDATA;
vpk->block_count = (st->duration + (samples_per_block - 1)) / samples_per_block;
vpk->last_block_size = (st->duration % samples_per_block) * 16 * st->codecpar->channels / 28;
if (offset < avio_tell(s->pb))
return AVERROR_INVALIDDATA;
avio_skip(s->pb, offset - avio_tell(s->pb));
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);