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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-17 21:40:59 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-26 17:22:42 +0200 |
| commit | 0e45886e6ea272f453cb949e95c3bfd8380974c5 (patch) | |
| tree | fd67bb22ae57d6a92d9f489f669d5d5ffa00f813 | |
| parent | 8e67cfe15b062362cdc22be2a31167efc55b1e13 (diff) | |
| download | ffmpeg-0e45886e6ea272f453cb949e95c3bfd8380974c5.tar.gz | |
avcodec/apedec: Fix integer overflow in filter_fast_3320()
Fixes: signed integer overflow: 2145649668 + 3956526 cannot be represented in type 'int'
Fixes: 38351/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-4647077926273024
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
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 050523601d..27d0ff3565 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -879,7 +879,7 @@ static av_always_inline int filter_fast_3320(APEPredictor *p, } predictionA = p->buf[delayA] * 2U - p->buf[delayA - 1]; - p->lastA[filter] = decoded + ((int32_t)(predictionA * p->coeffsA[filter][0]) >> 9); + p->lastA[filter] = decoded + (unsigned)((int32_t)(predictionA * p->coeffsA[filter][0]) >> 9); if ((decoded ^ predictionA) > 0) p->coeffsA[filter][0]++; |