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avcodec/dirac_dwt: Fix multiple integer overflows in COMPOSE_DD97iH0()

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Fixes: runtime error: signed integer overflow: 9 * 335544320 cannot be represented in type 'int'
Fixes: 2739/clusterfuzz-testcase-minimized-6737297955356672

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-07-28 03:22:40 +02:00
parent c0220c768c
commit bf8ab72ae9
1 changed files with 1 additions and 1 deletions
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libavcodec/dirac_dwt.h
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@ -99,7 +99,7 @@ void ff_spatial_idwt_slice2(DWTContext *d, int y);
(b1 + ((b0 + b2 + 1) >> 1))
#define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\
(b2 + ((-b0 + 9*b1 + 9*b3 - b4 + 8) >> 4))
(b2 + ((int)(-b0 + 9U*b1 + 9U*b3 - b4 + 8) >> 4))
#define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\
(b2 - ((-b0 + 9*b1 + 9*b3 - b4 + 16) >> 5))