* util.c (ruby_strtod): check integr overflow.

  [ruby-dev:42180] #3789

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 6 deletions

diff --git a/util.c b/util.c
index 762d97f0b9..9d10498a66 100644
--- a/util.c
+++ b/util.c
@@ -2143,12 +2143,17 @@ break2:
 
                nd = 0;
                c = *s;
-               if (c < '0' || '9' < c) goto ret0;
-               do {
-		    nd *= 10;
-		    nd += c;
-		    nd -= '0';
-                   c = *++s;
+	       if (c < '0' || '9' < c) goto ret0;
+	       do {
+		   nd *= 10;
+		   nd += c;
+		   nd -= '0';
+		   c = *++s;
+		   /* Float("0x0."+("0"*267)+"1fp2095") */
+		   if (abs(nd) > 2095) {
+		       while ('0' <= c && c <= '9') c = *++s;
+		       break;
+		   }
                } while ('0' <= c && c <= '9');
 		dval(rv) = ldexp(adj, nd * dsign);
 	    }