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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-16 10:54:13 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-14 23:30:38 +0100 |
| commit | 91abbbda598e457a6b48778a43a7ca7f1f0f36ac (patch) | |
| tree | 969e271e52f79de5ae7a6a55826eccc6faa9de97 /libavcodec | |
| parent | 428dee1a0357203dab107f3769485013d886f9ad (diff) | |
| download | ffmpeg-91abbbda598e457a6b48778a43a7ca7f1f0f36ac.tar.gz | |
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>
(cherry picked from commit 0af08cb803844b9eba4ff3e552c26452ec6fa7d2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -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); |