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Code Issues Releases Activity

avcodec/ilbcdec: fix integer overflow in energy

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webrtc uses a int32_t like the existing code in ilbcdec

Fixes: signed integer overflow: 2080245063 + 257939661 cannot be represented in type 'int'
Fixes: 11037/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5682976612941824

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 2018-12-09 02:26:18 +01:00
parent 4096c670ab
commit fbf409cd91
1 changed files with 2 additions and 1 deletions
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libavcodec/ilbcdec.c
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@ -1303,7 +1303,8 @@ static int xcorr_coeff(int16_t *target, int16_t *regressor,
pos += step;
/* Do a +/- to get the next energy */
energy += step * ((*rp_end * *rp_end - *rp_beg * *rp_beg) >> shifts);
energy += (unsigned)step * ((*rp_end * *rp_end - *rp_beg * *rp_beg) >> shifts);
rp_beg += step;
rp_end += step;
}