From c5a691323201ace5f5299b6914c8e1709918c521 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 20 May 2015 17:06:08 +0000
Subject: merge revision(s) 49792: [Backport #10918]

	* gc.c (id2ref): prohibit from accessing internal objects.
	  [ruby-core:68348] [Bug #10918]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50565 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 gc.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gc.c')

diff --git a/gc.c b/gc.c
index c84da503ea..b843e7bb73 100644
--- a/gc.c
+++ b/gc.c
@@ -2761,6 +2761,9 @@ id2ref(VALUE obj, VALUE objid)
     if (!is_live_object(objspace, ptr)) {
 	rb_raise(rb_eRangeError, "%p is recycled object", p0);
     }
+    if (RBASIC(ptr)->klass == 0) {
+	rb_raise(rb_eRangeError, "%p is internal object", p0);
+    }
     return (VALUE)ptr;
 }
 
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