Fixed bug #78038 socket_select with references

Author: nikic

NEWS

@@ -14,6 +14,10 @@ PHP                                                                        NEWS
   . Fixed bug #77956 (When mysqli.allow_local_infile = Off, use a meaningful
     error message). (Sjon Hortensius)
 
+- Sockets:
+  . Fixed bug #78038 (Socket_select fails when resource array contains
+    references). (Nikita)
+
 30 May 2019, PHP 7.2.19
 
 - FPM:

ext/sockets/sockets.c

@@ -853,6 +853,7 @@ static int php_sock_array_to_fd_set(zval *sock_array, fd_set *fds, PHP_SOCKET *m
 	if (Z_TYPE_P(sock_array) != IS_ARRAY) return 0;
 
 	ZEND_HASH_FOREACH_VAL(Z_ARRVAL_P(sock_array), element) {
+		ZVAL_DEREF(element);
 		php_sock = (php_socket*) zend_fetch_resource_ex(element, le_socket_name, le_socket);
 		if (!php_sock) continue; /* If element is not a resource, skip it */
 
@@ -881,6 +882,7 @@ static int php_sock_array_from_fd_set(zval *sock_array, fd_set *fds) /* {{{ */
 
 	array_init(&new_hash);
 	ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(sock_array), num_key, key, element) {
+		ZVAL_DEREF(element);
 		php_sock = (php_socket*) zend_fetch_resource_ex(element, le_socket_name, le_socket);
 		if (!php_sock) continue; /* If element is not a resource, skip it */
 

ext/sockets/tests/socket_select.phpt

@@ -17,6 +17,7 @@ socket_create_pair($domain, SOCK_STREAM, 0, $sockets);
 
 $write  = null;
 $except = null;
+$ref =& $sockets[0]; // bug #78038
 var_dump(socket_select($sockets, $write, $except, 0));
 --EXPECT--
 int(0)