From: Cristy <urban-warrior@imagemagick.org>
Date: Thu, 5 Apr 2018 12:54:32 +0000 (-0400)
Subject: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7397
X-Git-Tag: 7.0.7-29~190
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=64e258cd746b0eefaa97d01ed034e3a29282a0f5;p=imagemagick

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7397
---

diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index 1fbc68ac0..1b007cdcc 100644
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -2755,7 +2755,7 @@ static double FxEvaluateSubexpression(FxInfo *fx_info,
         {
           alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
             depth+1,beta,exception);
-          gamma=alpha-floor((alpha/(*beta)))*(*beta);
+          gamma=alpha-floor((alpha*PerceptibleReciprocal(*beta)))*(*beta);
           FxReturn(gamma);
         }
       if (LocaleCompare(expression,"m") == 0)