Re: [FFmpeg-devel] [PATCH] avcodec/dirac_dwt: Fix integer overflow in COMPOSE_FIDELITYi*

2017-11-25 Thread Michael Niedermayer 
On Sat, Nov 25, 2017 at 03:43:29AM +0100, Michael Niedermayer wrote:
> Fixes: runtime error: signed integer overflow: -2143827186 - 7404944 cannot 
> be represented in type 'int'
> Fixes: 4354/clusterfuzz-testcase-minimized-4671122764201984
> 
> Found-by: continuous fuzzing process 
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer 
> ---
>  libavcodec/dirac_dwt.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

applied

[...]
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Breaking DRM is a little like attempting to break through a door even
though the window is wide open and the only thing in the house is a bunch
of things you dont want and which you would get tomorrow for free anyway


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[FFmpeg-devel] [PATCH] avcodec/dirac_dwt: Fix integer overflow in COMPOSE_FIDELITYi*

2017-11-24 Thread Michael Niedermayer 
Fixes: runtime error: signed integer overflow: -2143827186 - 7404944 cannot be 
represented in type 'int'
Fixes: 4354/clusterfuzz-testcase-minimized-4671122764201984

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 
---
 libavcodec/dirac_dwt.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/dirac_dwt.h b/libavcodec/dirac_dwt.h
index f9a9e9e1b3..eb5aebc878 100644
--- a/libavcodec/dirac_dwt.h
+++ b/libavcodec/dirac_dwt.h
@@ -111,10 +111,10 @@ void ff_spatial_idwt_slice2(DWTContext *d, int y);
 (b0 + b1)
 
 #define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
-(b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 
46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))
+((unsigned)b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 
46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))
 
 #define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
-(b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 
25*(b2+(unsigned)b6) +  81*(b3+(unsigned)b5) + 128) >> 8))
+((unsigned)b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 
25*(b2+(unsigned)b6) +  81*(b3+(unsigned)b5) + 128) >> 8))
 
 #define COMPOSE_DAUB97iL1(b0, b1, b2)\
 (b1 - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12))
-- 
2.15.0

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Re: [FFmpeg-devel] [PATCH] avcodec/dirac_dwt: Fix integer overflow in COMPOSE_FIDELITYi*()

2017-09-22 Thread Michael Niedermayer 
On Mon, Sep 18, 2017 at 02:54:58AM +0200, Michael Niedermayer wrote:
> Fixes: runtime error: signed integer overflow: 161 * 13872281 cannot be 
> represented in type 'int'
> 
> Fixes: 3295/clusterfuzz-testcase-minimized-4738998142500864
> 
> Found-by: continuous fuzzing process 
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer 
> ---
>  libavcodec/dirac_dwt.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

applied

[...]
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Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I am the wisest man alive, for I know one thing, and that is that I know
nothing. -- Socrates


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[FFmpeg-devel] [PATCH] avcodec/dirac_dwt: Fix integer overflow in COMPOSE_FIDELITYi*()

2017-09-17 Thread Michael Niedermayer 
Fixes: runtime error: signed integer overflow: 161 * 13872281 cannot be 
represented in type 'int'

Fixes: 3295/clusterfuzz-testcase-minimized-4738998142500864

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 
---
 libavcodec/dirac_dwt.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/dirac_dwt.h b/libavcodec/dirac_dwt.h
index adf5178714..755d5e5d2d 100644
--- a/libavcodec/dirac_dwt.h
+++ b/libavcodec/dirac_dwt.h
@@ -111,10 +111,10 @@ void ff_spatial_idwt_slice2(DWTContext *d, int y);
 (b0 + b1)
 
 #define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
-(b4 - ((-8*(b0+b8) + 21*(b1+b7) - 46*(b2+b6) + 161*(b3+b5) + 128) >> 8))
+(b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 
46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))
 
 #define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
-(b4 + ((-2*(b0+b8) + 10*(b1+b7) - 25*(b2+b6) + 81*(b3+b5) + 128) >> 8))
+(b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 
25*(b2+(unsigned)b6) +  81*(b3+(unsigned)b5) + 128) >> 8))
 
 #define COMPOSE_DAUB97iL1(b0, b1, b2)\
 (b1 - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12))
-- 
2.14.1

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