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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-12-02 21:48:04 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-12-07 23:38:06 +0100 |
| commit | 3a6140e4cf8955cf9314d6f0b0f6be3e18846fa7 (patch) | |
| tree | e99a84533660b0e55e984de4c1c60674f8381e3a | |
| parent | a749f4864e48ce31dff4028018bff84fb8fca218 (diff) | |
| download | ffmpeg-3a6140e4cf8955cf9314d6f0b0f6be3e18846fa7.tar.gz | |
avcodec/dirac_dwt: Fix integer overflows in COMPOSE_DAUB97*
Fixes: 4478/clusterfuzz-testcase-minimized-4752113767809024
Fixes: runtime error: signed integer overflow: -2147483626 + -319489 cannot be represented in type 'int'
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 5e9a13a5a33bf7566591216e335f2529612100bb)
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 eb5aebc878..50c8b1e394 100644 --- a/libavcodec/dirac_dwt.h +++ b/libavcodec/dirac_dwt.h @@ -117,16 +117,16 @@ void ff_spatial_idwt_slice2(DWTContext *d, int y); ((unsigned)b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 25*(b2+(unsigned)b6) + 81*(b3+(unsigned)b5) + 128) >> 8)) #define COMPOSE_DAUB97iL1(b0, b1, b2)\ - (b1 - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12)) + ((unsigned)(b1) - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12)) #define COMPOSE_DAUB97iH1(b0, b1, b2)\ - (b1 - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7)) + ((unsigned)(b1) - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7)) #define COMPOSE_DAUB97iL0(b0, b1, b2)\ - (b1 + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12)) + ((unsigned)(b1) + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12)) #define COMPOSE_DAUB97iH0(b0, b1, b2)\ - (b1 + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12)) + ((unsigned)(b1) + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12)) #endif /* AVCODEC_DWT_H */ |