File php-5.2.14-CVE-2010-4697.patch of Package php-5.2.17

Index: Zend/zend_object_handlers.c
===================================================================
--- Zend/zend_object_handlers.c.orig
+++ Zend/zend_object_handlers.c
@@ -329,6 +329,9 @@ zval *zend_std_read_property(zval *objec
 		    !guard->in_get) {
 			/* have getter - try with it! */
 			ZVAL_ADDREF(object);
+			if (PZVAL_IS_REF(object)) {
+				SEPARATE_ZVAL(&object);
+			}
 			guard->in_get = 1; /* prevent circular getting */
 			rv = zend_std_call_getter(object, member TSRMLS_CC);
 			guard->in_get = 0;
@@ -418,22 +421,22 @@ static void zend_std_write_property(zval
 			}
 		}
 	} else {
-		int setter_done = 0;
 		zend_guard *guard;
 
 		if (zobj->ce->__set &&
 		    zend_get_property_guard(zobj, property_info, member, &guard) == SUCCESS &&
 		    !guard->in_set) {
 			ZVAL_ADDREF(object);
+			if (PZVAL_IS_REF(object)) {
+				SEPARATE_ZVAL(&object);
+			}
 			guard->in_set = 1; /* prevent circular setting */
 			if (zend_std_call_setter(object, member, value TSRMLS_CC) != SUCCESS) {
 				/* for now, just ignore it - __set should take care of warnings, etc. */
 			}
-			setter_done = 1;
 			guard->in_set = 0;
 			zval_ptr_dtor(&object);
-		}
-		if (!setter_done && property_info) {
+		} else if (property_info) {
 			zval **foo;
 
 			/* if we assign referenced variable, we should separate it */
@@ -611,6 +614,9 @@ static void zend_std_unset_property(zval
 		    !guard->in_unset) {
 			/* have unseter - try with it! */
 			ZVAL_ADDREF(object);
+			if (PZVAL_IS_REF(object)) {
+				SEPARATE_ZVAL(&object);
+			}
 			guard->in_unset = 1; /* prevent circular unsetting */
 			zend_std_call_unsetter(object, member TSRMLS_CC);
 			guard->in_unset = 0;
@@ -1042,6 +1048,9 @@ static int zend_std_has_property(zval *o
 
 			/* have issetter - try with it! */
 			ZVAL_ADDREF(object);
+			if (PZVAL_IS_REF(object)) {
+				SEPARATE_ZVAL(&object);
+			}
 			guard->in_isset = 1; /* prevent circular getting */
 			rv = zend_std_call_issetter(object, member TSRMLS_CC);
 			if (rv) {
Index: Zend/tests/bug52879.phpt
===================================================================
--- /dev/null
+++ Zend/tests/bug52879.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Bug #52879 (Objects unreferenced in __get, __set, __isset or __unset can be freed too early)
+--FILE--
+<?php
+class MyClass {
+public $myRef;
+public function __set($property,$value) {
+$this->myRef = $value;
+}
+}
+$myGlobal=new MyClass($myGlobal);
+$myGlobal->myRef=&$myGlobal;
+$myGlobal->myNonExistentProperty="ok\n";
+echo $myGlobal;
+--EXPECT--
+ok 
+