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vp3: Check the framerate for validity

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Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 6fc8226e29055858f28973bb3d27b63b3b65e616)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit b4c479a82adbb1301e3e549cd80cdd65208ddd05)
This commit is contained in:
Martin Storsjö 2013-09-12 12:27:58 +03:00 committed by Luca Barbato
parent 7f80928c0e
commit 290783b848
1 changed files with 4 additions and 0 deletions
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4
libavcodec/vp3.c
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@ -2155,6 +2155,10 @@ static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
fps.num = get_bits_long(gb, 32);
fps.den = get_bits_long(gb, 32);
if (fps.num && fps.den) {
if (fps.num < 0 || fps.den < 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
return AVERROR_INVALIDDATA;
}
av_reduce(&avctx->time_base.num, &avctx->time_base.den,
fps.den, fps.num, 1<<30);
}