akr	2013-08-01 21:05:04 +0900 (Thu, 01 Aug 2013)

  New Revision: 42307

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=42307

  Log:
    * bignum.c (rb_big2str1): Raise an error for too big number.

  Modified files:
    trunk/ChangeLog
    trunk/bignum.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 42306)
+++ ChangeLog	(revision 42307)
@@ -1,3 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Thu Aug  1 21:02:48 2013  Tanaka Akira  <akr@f...>
+
+	* bignum.c (rb_big2str1): Raise an error for too big number.
+
 Thu Aug  1 20:46:29 2013  Tanaka Akira  <akr@f...>
 
 	* bignum.c (power_cache_get_power): Hide cached Bignum objects.
Index: bignum.c
===================================================================
--- bignum.c	(revision 42306)
+++ bignum.c	(revision 42307)
@@ -4366,6 +4366,10 @@ rb_big2str1(VALUE x, int base) https://github.com/ruby/ruby/blob/trunk/bignum.c#L4366
     if (base < 2 || 36 < base)
 	rb_raise(rb_eArgError, "invalid radix %d", base);
 
+    if (RBIGNUM_LEN(x) >= LONG_MAX/BITSPERDIG) {
+        rb_raise(rb_eRangeError, "bignum too big to convert into `string'");
+    }
+
     if (POW2_P(base)) {
         /* base == 2 || base == 4 || base == 8 || base == 16 || base == 32 */
         return big2str_base_powerof2(x, base);

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