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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-17 21:47:09 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-02-18 23:27:03 +0100 |
| commit | 647fa49495c39a48b7ccb92acd8fb975b1575456 (patch) | |
| tree | c582627b64a42aeb50a44a2244017c1b7d21f3dd | |
| parent | f82dd4c09b2decb033f1e339d4be81efd38554f1 (diff) | |
| download | ffmpeg-647fa49495c39a48b7ccb92acd8fb975b1575456.tar.gz | |
avcodec/dirac_dwt_template: Fix Integer overflow in horizontal_compose_dd137i()
Fixes: 5894/clusterfuzz-testcase-minimized-5315325420634112
Fixes: runtime error: signed integer overflow: 2147483647 + 1 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>
| -rw-r--r-- | libavcodec/dirac_dwt_template.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/dirac_dwt_template.c b/libavcodec/dirac_dwt_template.c index e68cc4d530..8c25c1f822 100644 --- a/libavcodec/dirac_dwt_template.c +++ b/libavcodec/dirac_dwt_template.c @@ -95,8 +95,8 @@ static void RENAME(horizontal_compose_dd97i)(uint8_t *_b, uint8_t *_tmp, int w) tmp[w2+1] = tmp[w2] = tmp[w2-1]; for (x = 0; x < w2; x++) { - b[2*x ] = (tmp[x] + 1)>>1; - b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1; + b[2*x ] = ((int)(tmp[x] + 1U))>>1; + b[2*x+1] = ((int)(COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1U))>>1; } } @@ -118,8 +118,8 @@ static void RENAME(horizontal_compose_dd137i)(uint8_t *_b, uint8_t *_tmp, int w) tmp[w2+1] = tmp[w2] = tmp[w2-1]; for (x = 0; x < w2; x++) { - b[2*x ] = (tmp[x] + 1)>>1; - b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1; + b[2*x ] = ((int)(tmp[x] + 1U))>>1; + b[2*x+1] = ((int)(COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1U))>>1; } } |