diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-04 20:55:28 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-05 23:22:27 +0300 |
| commit | 33feb527fff9bf547c4118147434869875cf0c3d (patch) | |
| tree | 18d3f91c220b6d5c81d56cb61b2b335d9d9e4768 /libavcodec | |
| parent | e58692837c20c8484a23cd9beb63ac422f82458a (diff) | |
avcodec/apedec: Fix 2 integer overflows in filter_3800()
Fixes: signed integer overflow: 1683879955 - -466265224 cannot be represented in type 'int'
Fixes: 37419/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6074294407921664
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -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 022a6f9398..bf481ba354 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -909,8 +909,8 @@ static av_always_inline int filter_3800(APEPredictor *p, return predictionA; } d2 = p->buf[delayA]; - d1 = (p->buf[delayA] - p->buf[delayA - 1]) * 2U; - d0 = p->buf[delayA] + ((p->buf[delayA - 2] - p->buf[delayA - 1]) * 8U); + d1 = (p->buf[delayA] - (unsigned)p->buf[delayA - 1]) * 2; + d0 = p->buf[delayA] + ((p->buf[delayA - 2] - (unsigned)p->buf[delayA - 1]) * 8); d3 = p->buf[delayB] * 2U - p->buf[delayB - 1]; d4 = p->buf[delayB]; |