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avcodec/indeo2: check ctab
Fixes out of array access Fixes: 6b73fa392ac808f02e95a4e0a5770026/asan_static-oob_1b15f9a_1969_e7778535e5f27225fe0d6ded14721430.AVI Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -172,6 +172,12 @@ static int ir2_decode_frame(AVCodecContext *avctx,
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ltab = buf[0x22] & 3;
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ctab = buf[0x22] >> 2;
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if (ctab > 3) {
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av_log(avctx, AV_LOG_ERROR, "ctab %d is invalid\n", ctab);
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return AVERROR_INVALIDDATA;
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}
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if (s->decode_delta) { /* intraframe */
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if ((ret = ir2_decode_plane(s, avctx->width, avctx->height,
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p->data[0], p->linesize[0],
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