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avcodec/aacdec_fixed: Fix undefined integer overflow in apply_independent_coupling_fixed() 

Fixes: signed integer overflow: 1195517 * 2048 cannot be represented in type 'int'
Fixes: 8636/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-4695836326887424

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 2018-06-14 16:41:49 +02:00
parent 575d8ca026
commit 8bd514d934
1 changed files with 1 additions and 1 deletions
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libavcodec/aacdec_fixed.c
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@ -436,7 +436,7 @@ static void apply_independent_coupling_fixed(AACContext *ac,
else { else {
for (i = 0; i < len; i++) { for (i = 0; i < len; i++) {
tmp = (int)(((int64_t)src[i] * c + (int64_t)0x1000000000) >> 37); tmp = (int)(((int64_t)src[i] * c + (int64_t)0x1000000000) >> 37);
dest[i] += tmp * (1 << shift); dest[i] += tmp * (1U << shift);
} }
} }
} }