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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-02 19:11:46 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-08 19:45:47 +0200 |
| commit | c7dca182268ac493ba38a18d50c8fcce998ebcaa (patch) | |
| tree | 8b497ad1c13e9342a07d7c4ddcaab99e3fa22d33 | |
| parent | e1d4289596186980521a74e47486c25f93b9e3cf (diff) | |
| download | ffmpeg-c7dca182268ac493ba38a18d50c8fcce998ebcaa.tar.gz | |
avcodec/shorten: Fix undefined addition in shorten_decode_frame()
Fixes: signed integer overflow: 1139785606 + 1454196085 cannot be represented in type 'int'
Fixes: 8937/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-6202943597445120
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 3b10bb8772c76177cc47b8d15a6970f19dd11039)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/shorten.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 6850e5af15..94deb0a316 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -668,7 +668,7 @@ static int shorten_decode_frame(AVCodecContext *avctx, void *data, else { int32_t sum = (s->version < 2) ? 0 : s->nmean / 2; for (i = 0; i < s->nmean; i++) - sum += s->offset[channel][i]; + sum += (unsigned)s->offset[channel][i]; coffset = sum / s->nmean; if (s->version >= 2) coffset = s->bitshift == 0 ? coffset : coffset >> s->bitshift - 1 >> 1; |