- Fixed bug #48562 (Reference recursion causes segfault when used in wddx_serialize_vars())

ext/wddx/tests/bug48562.phpt

@@ -0,0 +1,22 @@
+--TEST--
+Bug #48562 (Reference recursion causes segfault when used in wddx_serialize_vars())
+--FILE--
+<?php
+
+$foo = 'bar';
+
+$a['x'] = 'foo';
+$a['x'] = &$a;
+
+var_dump(wddx_serialize_vars($a));
+
+$a['x'] = 'foo';
+$a['x'] = $a;
+
+var_dump(wddx_serialize_vars($a));
+
+?>
+--EXPECTF--
+Warning: wddx_serialize_vars(): recursion detected in %s on line %d
+string(78) "<wddxPacket version='1.0'><header/><data><struct></struct></data></wddxPacket>"
+string(120) "<wddxPacket version='1.0'><header/><data><struct><var name='foo'><string>bar</string></var></struct></data></wddxPacket>"

ext/wddx/wddx.c

@@ -700,13 +700,27 @@ static void php_wddx_add_var(wddx_packet *packet, zval *name_var)
 			php_wddx_serialize_var(packet, *val, Z_STRVAL_P(name_var), Z_STRLEN_P(name_var) TSRMLS_CC);
 		}		
 	} else if (Z_TYPE_P(name_var) == IS_ARRAY || Z_TYPE_P(name_var) == IS_OBJECT) {
+		int is_array = Z_TYPE_P(name_var) == IS_ARRAY;
+
 		target_hash = HASH_OF(name_var);
 		
+		if (is_array && target_hash->nApplyCount > 1) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "recursion detected");
+			return;
+		}
+
 		zend_hash_internal_pointer_reset(target_hash);
 
 		while(zend_hash_get_current_data(target_hash, (void**)&val) == SUCCESS) {
+			if (is_array) {
+				target_hash->nApplyCount++;
+			}
+
 			php_wddx_add_var(packet, *val);
-				
+
+			if (is_array) {
+				target_hash->nApplyCount--;
+			}
 			zend_hash_move_forward(target_hash);
 		}
 	}