[FFmpeg-cvslog] avcodec/dirac_dwt: Fix integer overflow in COMPOSE_DD137iL0()
Michael Niedermayer
git at videolan.org
Tue Jan 9 02:27:48 EET 2018
ffmpeg | branch: release/3.2 | Michael Niedermayer <michael at niedermayer.cc> | Tue Nov 14 03:40:07 2017 +0100| [37a14a3d83a3b988c061ef5004141fe49eae33e0] | committer: Michael Niedermayer
avcodec/dirac_dwt: Fix integer overflow in COMPOSE_DD137iL0()
Fixes: 4035/clusterfuzz-testcase-minimized-6479308925173760
Fixes: runtime error: signed integer overflow: 9 * 402653183 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 at niedermayer.cc>
(cherry picked from commit 73964680d7bce6d81ddc553a24d73e9a1c9156f9)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=37a14a3d83a3b988c061ef5004141fe49eae33e0
---
libavcodec/dirac_dwt.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/dirac_dwt.h b/libavcodec/dirac_dwt.h
index 35ed8857e9..f9a9e9e1b3 100644
--- a/libavcodec/dirac_dwt.h
+++ b/libavcodec/dirac_dwt.h
@@ -102,7 +102,7 @@ void ff_spatial_idwt_slice2(DWTContext *d, int y);
(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))
+ (b2 - ((int)(-b0 + 9U*b1 + 9U*b3 - b4 + 16) >> 5))
#define COMPOSE_HAARiL0(b0, b1)\
(b0 - ((b1 + 1) >> 1))
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