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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-16 10:54:13 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-21 11:26:35 +0200 |
| commit | 0af08cb803844b9eba4ff3e552c26452ec6fa7d2 (patch) | |
| tree | 52533b4d1f5b3aeec363842b5fd07ae770f655e9 /libavcodec/apedec.c | |
| parent | 54bd47f861e8cdc74aea816ebfbbaac25fefd0d1 (diff) | |
avcodec/apedec: Fix multiple integer overflows in predictor_update_filter()
Fixes: signed integer overflow: -829262115 + -1410750414 cannot be represented in type 'int'
Fixes: 15251/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5651742252859392
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/apedec.c')
| -rw-r--r-- | libavcodec/apedec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c index eb31fd70c1..63335f542c 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -1142,7 +1142,7 @@ static av_always_inline int predictor_update_filter(APEPredictor *p, p->buf[delayB - 3] * p->coeffsB[filter][3] + p->buf[delayB - 4] * p->coeffsB[filter][4]; - p->lastA[filter] = decoded + ((predictionA + (predictionB >> 1)) >> 10); + p->lastA[filter] = decoded + ((int)((unsigned)predictionA + (predictionB >> 1)) >> 10); p->filterA[filter] = p->lastA[filter] + ((p->filterA[filter] * 31) >> 5); sign = APESIGN(decoded); |