mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/fic: Check coefficients
Fixes: signed integer overflow: 1258291200 * 2 cannot be represented in type 'int' Fixes: 1413/clusterfuzz-testcase-minimized-5923451770503168 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -150,9 +150,13 @@ static int fic_decode_block(FICContext *ctx, GetBitContext *gb,
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if (num_coeff > 64)
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return AVERROR_INVALIDDATA;
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for (i = 0; i < num_coeff; i++)
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block[ff_zigzag_direct[i]] = get_se_golomb(gb) *
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for (i = 0; i < num_coeff; i++) {
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int v = get_se_golomb(gb);
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if (v < -2048 || v > 2048)
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return AVERROR_INVALIDDATA;
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block[ff_zigzag_direct[i]] = v *
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ctx->qmat[ff_zigzag_direct[i]];
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}
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fic_idct_put(dst, stride, block);
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