Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavformat/vpk.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libavformat/vpk.c b/libavformat/vpk.c
index dcc2db329c..255d6030b0 100644
--- a/libavformat/vpk.c
+++ b/libavformat/vpk.c
@@ -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);
--
2.21.0
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