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avcodec/aacdec_fixed: Fix integer overflow in apply_dependent_coupling_fixed() 

Fixes: runtime error: signed integer overflow: 623487 * 536870912 cannot be represented in type 'int'
Fixes: 3594/clusterfuzz-testcase-minimized-4650622935629824

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-10-27 02:23:21 +02:00
parent 0976752420
commit 41d96af2a7
1 changed files with 1 additions and 1 deletions
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libavcodec/aacdec_fixed.c
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@ -394,7 +394,7 @@ static void apply_dependent_coupling_fixed(AACContext *ac,
for (k = offsets[i]; k < offsets[i + 1]; k++) {
tmp = (int)(((int64_t)src[group * 128 + k] * c + \
(int64_t)0x1000000000) >> 37);
dest[group * 128 + k] += tmp * (1 << shift);
dest[group * 128 + k] += tmp * (1U << shift);
}
}
}