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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-01 19:56:11 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-02 23:54:44 +0200 |
| commit | fd4500df5c87cba6f1cae97ec3cd0932e7a5eac7 (patch) | |
| tree | f515ae0470771b64cc034551d2ec38207ac55c5c | |
| parent | 92f4341ed113a3bb6ef36cbebcf10163d84a47d8 (diff) | |
| download | ffmpeg-fd4500df5c87cba6f1cae97ec3cd0932e7a5eac7.tar.gz | |
avcodec/dirac_dwt: Fix multiple overflows in 9/7 lifting
Fixes: runtime error: signed integer overflow: 1073901567 + 1073901567 cannot be represented in type 'int'
Fixes: 3124/clusterfuzz-testcase-minimized-454643435752652
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 f71cd44147e7a914f80fcfacca46c9e7b0374362)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/dirac_dwt.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/dirac_dwt.h b/libavcodec/dirac_dwt.h index e715e53bc4..adf5178714 100644 --- a/libavcodec/dirac_dwt.h +++ b/libavcodec/dirac_dwt.h @@ -117,16 +117,16 @@ void ff_spatial_idwt_slice2(DWTContext *d, int y); (b4 + ((-2*(b0+b8) + 10*(b1+b7) - 25*(b2+b6) + 81*(b3+b5) + 128) >> 8)) #define COMPOSE_DAUB97iL1(b0, b1, b2)\ - (b1 - ((int)(1817U*(b0 + b2) + 2048) >> 12)) + (b1 - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12)) #define COMPOSE_DAUB97iH1(b0, b1, b2)\ - (b1 - ((int)( 113U*(b0 + b2) + 64) >> 7)) + (b1 - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7)) #define COMPOSE_DAUB97iL0(b0, b1, b2)\ - (b1 + ((int)( 217U*(b0 + b2) + 2048) >> 12)) + (b1 + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12)) #define COMPOSE_DAUB97iH0(b0, b1, b2)\ - (b1 + ((int)(6497U*(b0 + b2) + 2048) >> 12)) + (b1 + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12)) #endif /* AVCODEC_DWT_H */ |