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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-02 12:13:19 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-02 19:41:48 +0100 |
| commit | f7f3c07282d3e793022b5cbd90efa257e5008384 (patch) | |
| tree | d04278fa3ea09bbfcdadfb20f12b68ba62b4d882 | |
| parent | f9749f3335f88890594fd357b895c6c5a9b166d2 (diff) | |
| download | ffmpeg-f7f3c07282d3e793022b5cbd90efa257e5008384.tar.gz | |
avcodec/apedec: make left/right unsigned to avoid undefined behavior
Fixes: signed integer overflow: 755176387 + 1515360583 cannot be represented in type 'int'
Fixes: 15506/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5706859232624640
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 bf778af1493b0814696307432763246fb53c75e7)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/apedec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c index 0e752469de..de005a33a2 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -1368,7 +1368,7 @@ static void ape_unpack_mono(APEContext *ctx, int count) static void ape_unpack_stereo(APEContext *ctx, int count) { - int32_t left, right; + unsigned left, right; int32_t *decoded0 = ctx->decoded[0]; int32_t *decoded1 = ctx->decoded[1]; @@ -1385,7 +1385,7 @@ static void ape_unpack_stereo(APEContext *ctx, int count) /* Decorrelate and scale to output depth */ while (count--) { - left = *decoded1 - (*decoded0 / 2); + left = *decoded1 - (unsigned)(*decoded0 / 2); right = left + *decoded0; *(decoded0++) = left; |