[FFmpeg-cvslog] avcodec/jpeg2000dsp: Fix multiple integer overflows in ict_int()
Michael Niedermayer
git at videolan.org
Sun Sep 17 17:53:58 EEST 2017
ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Fri Sep 8 23:29:12 2017 +0200| [33e67eb80cf2d67198828f9430815ef319ffae6e] | committer: Michael Niedermayer
avcodec/jpeg2000dsp: Fix multiple integer overflows in ict_int()
Fixes: runtime error: signed integer overflow: 22553 * -188962 cannot be represented in type 'int'
Fixes: 3042/clusterfuzz-testcase-minimized-5174210131394560
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 2d025e742843ca3532bd49ebbfebeacd51337347)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=33e67eb80cf2d67198828f9430815ef319ffae6e
---
libavcodec/jpeg2000dsp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/jpeg2000dsp.c b/libavcodec/jpeg2000dsp.c
index c746aed924..85a12d0e9b 100644
--- a/libavcodec/jpeg2000dsp.c
+++ b/libavcodec/jpeg2000dsp.c
@@ -65,9 +65,9 @@ static void ict_int(void *_src0, void *_src1, void *_src2, int csize)
for (i = 0; i < csize; i++) {
i0 = *src0 + *src2 + (((26345 * *src2) + (1 << 15)) >> 16);
- i1 = *src0 - (((i_ict_params[1] * *src1) + (1 << 15)) >> 16)
+ i1 = *src0 - ((int)(((unsigned)i_ict_params[1] * *src1) + (1 << 15)) >> 16)
- (((i_ict_params[2] * *src2) + (1 << 15)) >> 16);
- i2 = *src0 + (2 * *src1) + (((-14942 * *src1) + (1 << 15)) >> 16);
+ i2 = *src0 + (2 * *src1) + ((int)((-14942U * *src1) + (1 << 15)) >> 16);
*src0++ = i0;
*src1++ = i1;
*src2++ = i2;
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