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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-27 17:53:35 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:43 +0100 |
| commit | dfcd3ad2bcdf26152e32ac36d18946dbb434897d (patch) | |
| tree | 2b5eef8a39c05fd97360880f533827e0beb2ada7 | |
| parent | 4d392fc27ca805761cc4ee89147fbd0df6713f65 (diff) | |
| download | ffmpeg-dfcd3ad2bcdf26152e32ac36d18946dbb434897d.tar.gz | |
avcodec/g723_1dec: Fix overflow in shift
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>
(cherry picked from commit 07732f12a43ac3048e44c086c9a8c811452ba31c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/g723_1dec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/g723_1dec.c b/libavcodec/g723_1dec.c index ab952ec66d..f92eb76ba0 100644 --- a/libavcodec/g723_1dec.c +++ b/libavcodec/g723_1dec.c @@ -668,6 +668,8 @@ static int estimate_sid_gain(G723_1_Context *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); |