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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-18 11:52:47 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-02 17:18:55 +0200 |
| commit | 3b8d5bcc3189c6c46279889f1176c0caba4466e4 (patch) | |
| tree | abccc4d229c2aac40d967367c4452350faeb0da5 | |
| parent | 2d96c945312d3f62e3f872bfb51a593afb40e09a (diff) | |
| download | ffmpeg-3b8d5bcc3189c6c46279889f1176c0caba4466e4.tar.gz | |
avcodec/mv30: Fix integer overflows in idct2_1d()
Fixes: signed integer overflow: 6500736 * 473 cannot be represented in type 'int'
Fixes: 23259/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MV30_fuzzer-5179394271477760
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mv30.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libavcodec/mv30.c b/libavcodec/mv30.c index 76b9170eaf..c83ba7ffbd 100644 --- a/libavcodec/mv30.c +++ b/libavcodec/mv30.c @@ -200,10 +200,10 @@ static inline void idct2_1d(int *blk, int step) { const int t0 = blk[0 * step]; const int t1 = blk[1 * step]; - const int t2 = t1 * 473 >> 8; + const int t2 = (int)(t1 * 473U) >> 8; const int t3 = t2 - t1; - const int t4 = (t1 * 362 >> 8) - t3; - const int t5 = ((t1 * 277 >> 8) - t2) + t4; + const int t4 = ((int)(t1 * 362U) >> 8) - t3; + const int t5 = (((int)(t1 * 277U) >> 8) - t2) + t4; blk[0 * step] = t1 + t0; blk[1 * step] = t0 + t3; |