Fix GH-13603 ext/sockets: properly initialised address info data.

Led to random characters visible on socket id on macOs.

Close GH-13606

NEWS

@@ -16,6 +16,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-13544 (Pre-PHP 8.2 compatibility for mt_srand with
     unknown modes). (timwolla)
 
+- Sockets:
+  . Fixed bug GH-13604 (socket_getsockname returns random characters in the
+    end of the socket name). (David Carlier) 
+
 - SPL:
   . Fixed bug GH-13531 (Unable to resize SplfixedArray after being unserialized
     in PHP 8.2.15). (nielsdos)

ext/sockets/sockets.c

@@ -917,7 +917,7 @@ PHP_FUNCTION(socket_read)
 PHP_FUNCTION(socket_getsockname)
 {
 	zval					*arg1, *addr, *port = NULL;
-	php_sockaddr_storage	sa_storage;
+	php_sockaddr_storage	sa_storage = {0};
 	php_socket				*php_sock;
 	struct sockaddr			*sa;
 	struct sockaddr_in		*sin;
@@ -994,7 +994,7 @@ PHP_FUNCTION(socket_getsockname)
 PHP_FUNCTION(socket_getpeername)
 {
 	zval					*arg1, *arg2, *arg3 = NULL;
-	php_sockaddr_storage	sa_storage;
+	php_sockaddr_storage	sa_storage = {0};
 	php_socket				*php_sock;
 	struct sockaddr			*sa;
 	struct sockaddr_in		*sin;

ext/sockets/tests/gh13603.phpt

@@ -0,0 +1,15 @@
+--TEST--
+GH-13603 -  socket_getsockname - invalid characters
+--EXTENSIONS--
+sockets
+--FILE--
+<?php
+        $socket = socket_create(AF_UNIX, SOCK_STREAM, 0);
+        socket_bind($socket, 'sn.socp');
+        socket_listen($socket);
+        socket_getsockname($socket, $address);
+        var_dump($address);
+        socket_close($socket);
+        unlink($address);
+--EXPECT--
+string(7) "sn.socp"