[FFmpeg-cvslog] avcodec/jpeg2000dwt: Fix integer overflow in dwt_decode97_int()
Michael Niedermayer
git at videolan.org
Thu Mar 21 20:15:02 EET 2019
ffmpeg | branch: release/4.0 | Michael Niedermayer <michael at niedermayer.cc> | Tue Feb 19 00:05:51 2019 +0100| [4ee463b69f30c51d0665bfbd6b80364beb2ba65c] | committer: Michael Niedermayer
avcodec/jpeg2000dwt: Fix integer overflow in dwt_decode97_int()
Fixes: runtime error: signed integer overflow: 2147483598 + 128 cannot be represented in type 'int'
Fixes: 12926/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5705100733972480
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 4801eea0d465cd54670e7c19322705544e3e7524)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4ee463b69f30c51d0665bfbd6b80364beb2ba65c
---
libavcodec/jpeg2000dwt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c
index ce1678a3d7..badf0f8cd0 100644
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@@ -531,7 +531,7 @@ static void dwt_decode97_int(DWTContext *s, int32_t *t)
}
for (i = 0; i < w * h; i++)
- data[i] = (data[i] + ((1<<I_PRESHIFT)>>1)) >> I_PRESHIFT;
+ data[i] = (data[i] + ((1LL<<I_PRESHIFT)>>1)) >> I_PRESHIFT;
}
int ff_jpeg2000_dwt_init(DWTContext *s, int border[2][2],
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