mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/apedec: Fix 32bit int overflow in do_apply_filter()
Fixes: signed integer overflow: 2147480546 + 4096 cannot be represented in type 'int' Fixes: 16280/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5123442566758400 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1266,7 +1266,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f,
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f->delay - order,
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f->delay - order,
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f->adaptcoeffs - order,
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f->adaptcoeffs - order,
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order, APESIGN(*data));
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order, APESIGN(*data));
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res = (res + (1 << (fracbits - 1))) >> fracbits;
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res = (int)(res + (1U << (fracbits - 1))) >> fracbits;
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res += *data;
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res += *data;
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*data++ = res;
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*data++ = res;
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