[FFmpeg-cvslog] avfilter/vf_ciescope: Fix undefined behavior in rgb_to_xy() with black
Michael Niedermayer
git at videolan.org
Tue Jun 8 19:00:46 EEST 2021
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Jun 5 19:54:45 2021 +0200| [3d500e62f6206ad11308b18976246366aed8c1a5] | committer: Michael Niedermayer
avfilter/vf_ciescope: Fix undefined behavior in rgb_to_xy() with black
Fixes: floating point division by 0
Fixes: undefined behavior in handling NaN
Fixes: Ticket 8268
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3d500e62f6206ad11308b18976246366aed8c1a5
---
libavfilter/vf_ciescope.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavfilter/vf_ciescope.c b/libavfilter/vf_ciescope.c
index b3b906f517..cafdb915ea 100644
--- a/libavfilter/vf_ciescope.c
+++ b/libavfilter/vf_ciescope.c
@@ -849,7 +849,8 @@ rgb_to_xy(double rc,
*z = m[2][0] * rc + m[2][1] * gc + m[2][2] * bc;
sum = *x + *y + *z;
-
+ if (sum == 0)
+ sum = 1;
*x = *x / sum;
*y = *y / sum;
}
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