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avcodec/jpeg2000dec: Handle Psot = 0
Fixes Ticket2869 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -602,6 +602,9 @@ static int get_sot(Jpeg2000DecoderContext *s, int n)
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/* Read TNSot but not used */
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bytestream2_get_byteu(&s->g); // TNsot
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if (!Psot)
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Psot = bytestream2_get_bytes_left(&s->g) + n + 2;
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if (Psot > bytestream2_get_bytes_left(&s->g) + n + 2) {
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av_log(s->avctx, AV_LOG_ERROR, "Psot %"PRIu32" too big\n", Psot);
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return AVERROR_INVALIDDATA;
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