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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-15 22:00:47 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-05 23:19:39 +0200 |
| commit | bea287bdadd13b8045f6c043950ee5a405c3d768 (patch) | |
| tree | 472678e5ebcadd641b95cfc9c234b995daa74a62 | |
| parent | 2a7b3e62e0274f359ee1420f1d765292beb0508b (diff) | |
| download | ffmpeg-bea287bdadd13b8045f6c043950ee5a405c3d768.tar.gz | |
avcodec/apedec: Fix integer overflow in intermediate
Fixes: signed integer overflow: 559334865 * 4 cannot be represented in type 'int'
Fixes: 37929/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6751932295806976
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 90da43557f7257d72e95504f63ae6504406d6eab)
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 6df958eed6..181b7fe22d 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -1337,7 +1337,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f, absres = FFABSU(res); if (absres) *f->adaptcoeffs = APESIGN(res) * - (8 << ((absres > f->avg * 3) + (absres > f->avg * 4 / 3))); + (8 << ((absres > f->avg * 3) + (absres > (f->avg + f->avg / 3)))); /* equivalent to the following code if (absres <= f->avg * 4 / 3) *f->adaptcoeffs = APESIGN(res) * 8; |