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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-09-16 23:36:29 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-10-03 20:09:27 +0200 |
| commit | 515c0247a3062ca4639e457c81d2f58c504e9e8f (patch) | |
| tree | b0d2007e367992c0fc49ab1a3a203a4677052fa5 | |
| parent | bb9f8a1cb7d7b5e3742fe2212c144efea258f3d0 (diff) | |
| download | ffmpeg-515c0247a3062ca4639e457c81d2f58c504e9e8f.tar.gz | |
avcodec/apedec: Fix an integer overflow in predictor_update_filter()
Fixes: signed integer overflow: -2147483506 + -801380 cannot be represented in type 'int'
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6578985923117056
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 62cb397490..8bfbb75b41 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -1220,7 +1220,7 @@ static av_always_inline int predictor_update_filter(APEPredictor64 *p, if (interim_mode < 1) { predictionA = (int32_t)predictionA; predictionB = (int32_t)predictionB; - p->lastA[filter] = decoded + ((int32_t)(predictionA + (predictionB >> 1)) >> 10); + p->lastA[filter] = (int32_t)(decoded + (unsigned)((int32_t)(predictionA + (predictionB >> 1)) >> 10)); } else { p->lastA[filter] = decoded + ((int64_t)((uint64_t)predictionA + (predictionB >> 1)) >> 10); } |