mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/aacdec_fixed: use 64bit to avoid overflow in rounding in apply_dependent_coupling_fixed()
Fixes: signed integer overflow: -2141499320 + -14469590 cannot be represented in type 'int'
Fixes: 7351/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-6351214791884800
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 90475db97e
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -385,7 +385,7 @@ static void apply_dependent_coupling_fixed(AACContext *ac,
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for (k = offsets[i]; k < offsets[i + 1]; k++) {
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tmp = (int)(((int64_t)src[group * 128 + k] * c + \
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(int64_t)0x1000000000) >> 37);
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dest[group * 128 + k] += (tmp + round) >> shift;
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dest[group * 128 + k] += (tmp + (int64_t)round) >> shift;
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}
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}
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}
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