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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-11 01:30:42 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-25 14:51:57 +0300 |
| commit | 5f0afb748e504ca5cd94df405d8965397e850efc (patch) | |
| tree | 2a0a0cfd079ff21836bda48832ed8d98a6b92c7d | |
| parent | ed496ac4f50b253b8c407d21a62ed768b15815f9 (diff) | |
avcodec/apedec: Fix integer overflow in filter_3800()
Fixes: signed integer overflow: -2147448926 + -198321 cannot be represented in type 'int'
Fixes: 48798/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5739619273015296
Fixes: 48798/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6744428485672960
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 f05247f6a4698c14f1cd523daa90188f50dcf6ad)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -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 b65a740f87..de5627ad02 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -930,7 +930,7 @@ static av_always_inline int filter_3800(APEPredictor *p, p->coeffsB[filter][0] += (((d3 >> 29) & 4) - 2) * sign; p->coeffsB[filter][1] -= (((d4 >> 30) & 2) - 1) * sign; - p->filterB[filter] = p->lastA[filter] + (predictionB >> shift); + p->filterB[filter] = p->lastA[filter] + (unsigned)(predictionB >> shift); p->filterA[filter] = p->filterB[filter] + (unsigned)((int)(p->filterA[filter] * 31U) >> 5); return p->filterA[filter]; |