* bignum.c (bigand_int): Fix a buffer over read.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41637 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Wed Jun 26 07:27:17 2013  Tanaka Akira  <akr@fsij.org>
+
+	* bignum.c (bigand_int): Fix a buffer over read.
+
 Wed Jun 26 06:48:07 2013  Tanaka Akira  <akr@fsij.org>
 
 	* bignum.c (bigadd_int): Fix a buffer over read.

bignum.c

@@ -4651,13 +4651,10 @@ bigand_int(VALUE x, long y)
     i = 1;
     zds[0] = xds[0] & y;
 #else
-    {
-	long num = y;
-
-	for (i=0; i<bdigit_roomof(SIZEOF_LONG); i++) {
-	    zds[i] = xds[i] & BIGLO(num);
-	    num = BIGDN(num);
-	}
+    for (i=0; i < xn; i++) {
+        if (y == 0 || y == -1) break;
+        zds[i] = xds[i] & BIGLO(y);
+        y = BIGDN(y);
     }
 #endif
     while (i < xn) {