mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/on2avc: Check run more carefully
Fixes CID1239106 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -119,12 +119,12 @@ static int on2avc_decode_band_types(On2AVCContext *c, GetBitContext *gb)
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run_len = 1;
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do {
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run = get_bits(gb, bits_per_sect);
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run_len += run;
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} while (run == esc_val);
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if (band + run_len > num_bands) {
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if (run > num_bands - band - run_len) {
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av_log(c->avctx, AV_LOG_ERROR, "Invalid band type run\n");
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return AVERROR_INVALIDDATA;
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}
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run_len += run;
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} while (run == esc_val);
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for (i = band; i < band + run_len; i++) {
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c->band_type[i] = band_type;
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c->band_run_end[i] = band + run_len;
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