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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-02 22:44:50 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-06 23:00:46 +0200 |
| commit | ee89d9e3d6ee2023d5827ff26f32030ee013c41d (patch) | |
| tree | 0a40aa31da687b834dd20ca6bc152ed94e2abc6b | |
| parent | 1dec90d45656d9d142deb1f3134bc1a0b3fa5522 (diff) | |
| download | ffmpeg-ee89d9e3d6ee2023d5827ff26f32030ee013c41d.tar.gz | |
avcodec/apedec: Fix 32bit int overflow in do_apply_filter()
Fixes: signed integer overflow: 2147480546 + 4096 cannot be represented in type 'int'
Fixes: 16280/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5123442566758400
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 9d3ddef519e88c40c05be8cb94cd9e71c0957ec7)
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 b9df8c6b12..59e829ee5b 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -1266,7 +1266,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f, f->delay - order, f->adaptcoeffs - order, order, APESIGN(*data)); - res = (res + (1 << (fracbits - 1))) >> fracbits; + res = (int)(res + (1U << (fracbits - 1))) >> fracbits; res += *data; *data++ = res; |