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vp3: Check the framerate for validity
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org Signed-off-by: Martin Storsjö <martin@martin.st>
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@ -2199,6 +2199,10 @@ static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
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fps.num = get_bits_long(gb, 32);
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fps.num = get_bits_long(gb, 32);
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fps.den = get_bits_long(gb, 32);
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fps.den = get_bits_long(gb, 32);
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if (fps.num && fps.den) {
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if (fps.num && fps.den) {
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if (fps.num < 0 || fps.den < 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
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return AVERROR_INVALIDDATA;
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}
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av_reduce(&avctx->time_base.num, &avctx->time_base.den,
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av_reduce(&avctx->time_base.num, &avctx->time_base.den,
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fps.den, fps.num, 1<<30);
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fps.den, fps.num, 1<<30);
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}
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}
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