diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-17 15:06:21 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-17 23:34:47 +0200 |
| commit | 74cf081ef09fbdb64b910f6c168f4825a532f91c (patch) | |
| tree | 805f75ce4d888935ab96a57482e7faa0464e44ec | |
| parent | b7362f3c6bc24c2ed97729b54fc7583637b14fd4 (diff) | |
| download | ffmpeg-74cf081ef09fbdb64b910f6c168f4825a532f91c.tar.gz | |
avcodec/jpeg2000dsp: Reorder operations in ict_int() to avoid 2 integer overflows
Fixes: runtime error: signed integer overflow: 58065 * 51981 cannot be represented in type 'int'
Fixes: 2271/clusterfuzz-testcase-minimized-5778297776504832
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 c746f92a8e03d5a062359fba836eba4b3530687e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/jpeg2000dsp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/jpeg2000dsp.c b/libavcodec/jpeg2000dsp.c index d183cbb87d..c746aed924 100644 --- a/libavcodec/jpeg2000dsp.c +++ b/libavcodec/jpeg2000dsp.c @@ -64,10 +64,10 @@ static void ict_int(void *_src0, void *_src1, void *_src2, int csize) int i; for (i = 0; i < csize; i++) { - i0 = *src0 + (((i_ict_params[0] * *src2) + (1 << 15)) >> 16); + i0 = *src0 + *src2 + (((26345 * *src2) + (1 << 15)) >> 16); i1 = *src0 - (((i_ict_params[1] * *src1) + (1 << 15)) >> 16) - (((i_ict_params[2] * *src2) + (1 << 15)) >> 16); - i2 = *src0 + (((i_ict_params[3] * *src1) + (1 << 15)) >> 16); + i2 = *src0 + (2 * *src1) + (((-14942 * *src1) + (1 << 15)) >> 16); *src0++ = i0; *src1++ = i1; *src2++ = i2; |