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avcodec/g723_1dec: Fix overflow in shift

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Fixes: shift exponent 1008 is too large for 32-bit type 'int'
Fixes: 17700/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_G723_1_fuzzer-5707633436131328

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 2019-09-27 17:53:35 +02:00
parent 5c072c9ed7
commit 07732f12a4
1 changed files with 2 additions and 0 deletions
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libavcodec/g723_1dec.c
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@ -678,6 +678,8 @@ static int estimate_sid_gain(G723_1_ChannelContext *p)
else t = INT32_MAX;
} else
t = p->sid_gain << shift;
} else if(shift < -31) {
t = (p->sid_gain < 0) ? -1 : 0;
}else
t = p->sid_gain >> -shift;
x = av_clipl_int32(t * (int64_t)cng_filt[0] >> 16);