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avformat/matroskadec: fix off by 1 error in matroska_read_seek()

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Fixes out of array read

Fixes: vp9-opus-crash.webm

Found-by: Dale Curtis <dalecurtis@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-05-30 05:21:24 +02:00
parent 8bfb4d72dd
commit b3dfebd641
1 changed files with 1 additions and 1 deletions
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2
libavformat/matroskadec.c
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@ -3018,7 +3018,7 @@ static int matroska_read_seek(AVFormatContext *s, int stream_index,
tracks[i].stream, st->index_entries[index].timestamp,
AVSEEK_FLAG_BACKWARD);
while (index_sub >= 0 &&
index_min >= 0 &&
index_min > 0 &&
tracks[i].stream->index_entries[index_sub].pos < st->index_entries[index_min].pos &&
st->index_entries[index].timestamp - tracks[i].stream->index_entries[index_sub].timestamp < 30000000000 / matroska->time_scale)
index_min--;