Description:
------------
We have the bug under magento (but is a general bug), always when a complex SoapHeader is given, soap.so segfaults in PHP-FPM Module



Test script:
---------------
        $soapclient = new SoapClient($loggingSoapClientParameters);

$auth = array(
                        'UsernameToken'=> array('Username'=>$username,'Password'=>$password)
        );



        $ns = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd';
        $ns = 'http://example.com/';
        Mage::log($wsseAuthHeader);
        $auth = new SoapVar($auth, SOAP_ENC_ARRAY, NULL, $ns , NULL, $ns);

        $wsseAuthHeader = new SoapHeader($ns,'Security',$auth,true);
       


            $soapClient->__setSoapHeaders(array($wsseAuthHeader));

                $requestGetSecurityToken = new stdClass();
        $requestGetSecurityToken->UsesCount = 10;
        $parameter = array("request" => $requestGetSecurityToken);

        // execute the request
        $soapResponse = $soapClient->GetSecurityToken($parameter);

Expected result:
----------------
no segfault

Actual result:
--------------
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
master_to_xml_int (encode=encode@entry=0x0, data=<optimized out>, style=style@entry=2, parent=parent@entry=0x1110930, check_class_map=check_class_map@entry=1)
    at /usr/src/php/ext/soap/php_encoding.c:466
466			if (zend_hash_find(ht, "enc_namens", sizeof("enc_namens"), (void **)&znamens) == SUCCESS &&
(gdb) bt
#0  master_to_xml_int (encode=encode@entry=0x0, data=<optimized out>, style=style@entry=2, parent=parent@entry=0x1110930, check_class_map=check_class_map@entry=1)
    at /usr/src/php/ext/soap/php_encoding.c:466
#1  0x00007ffff0a31a3b in master_to_xml (encode=encode@entry=0x0, data=<optimized out>, style=style@entry=2, parent=parent@entry=0x1110930) at /usr/src/php/ext/soap/php_encoding.c:539
#2  0x00007ffff0a25ef8 in serialize_function_call (this_ptr=<optimized out>, function=<optimized out>, function_name=<optimized out>, uri=<optimized out>, arguments=<optimized out>, 
    arg_count=<optimized out>, version=1, soap_headers=0x187a6d8) at /usr/src/php/ext/soap/soap.c:4377
#3  0x00007ffff0a2bf9d in do_soap_call (this_ptr=0x177c0bb, this_ptr@entry=0x178bf40, function=0x7ffff0a595e3 "O", arg_count=24625328, arg_count@entry=1, real_args=0x736e, real_args@entry=0x0, 
    return_value=0x4, return_value@entry=0x187a6d8, location=0x652fb767fe9 <error: Cannot access memory at address 0x652fb767fe9>, location@entry=0x0, soap_action=0x0, call_uri=0x0, 
    soap_headers=0x187a6d8, output_headers=0x0, function_len=<optimized out>) at /usr/src/php/ext/soap/soap.c:2719
#4  0x00007ffff0a2c779 in zim_SoapClient___call (ht=<optimized out>, return_value=<optimized out>, return_value_ptr=<optimized out>, this_ptr=0x178bf40, return_value_used=<optimized out>)
    at /usr/src/php/ext/soap/soap.c:2943
#5  0x00007ffff23e16e5 in xdebug_execute_internal (current_execute_data=0x7fffffff9b60, fci=0x7fffffff9ca0, return_value_used=1) at /tmp/xdebug/xdebug.c:1651
#6  0x00000000006de9b5 in zend_call_function ()
#7  0x000000000070314c in zend_call_method ()
#8  0x000000000070f1dd in zend_std_call_user_call ()
#9  0x00007ffff23e16e5 in xdebug_execute_internal (current_execute_data=0x7ffff7fa2670, fci=0x0, return_value_used=1) at /tmp/xdebug/xdebug.c:1651
#10 0x00000000007a2f8e in ?? ()
#11 0x0000000000715af0 in execute_ex ()
#12 0x00007ffff23e0dc2 in xdebug_execute_ex (execute_data=0x7ffff7fa2670) at /tmp/xdebug/xdebug.c:1526
#13 0x00000000007a33a7 in ?? ()
#14 0x0000000000715af0 in execute_ex ()
#15 0x00007ffff23e0dc2 in xdebug_execute_ex (execute_data=0x7ffff7fa2180) at /tmp/xdebug/xdebug.c:1526
#16 0x00000000006ed9c0 in zend_execute_scripts ()
#17 0x000000000068e908 in php_execute_script ()
#18 0x00000000007a4faf in ?? ()
#19 0x000000000042ddb7 in ?? ()
#20 0x00007ffff5a1eb45 in __libc_start_main (main=0x42d990, argc=2, argv=0x7fffffffdb78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdb68)
    at libc-start.c:287
#21 0x000000000042def8 in _start ()