SOAP: Avoid indexing into null pointer

diff --git a/ext/soap/soap.c b/ext/soap/soap.c
index 663f260920d7d1e5da83ed2b54fd6578dcad1b4e..a74aaf7d15207e57a1ffa006caab58e9e924e314 100644 (file)
--- a/ext/soap/soap.c
+++ b/ext/soap/soap.c
@@ -4070,7 +4070,8 @@ static xmlDocPtr serialize_response_call(sdlFunctionPtr function, char *function
                                        int hdr_use = SOAP_LITERAL;
                                        zval *hdr_ret = &h->retval;
                                        char *hdr_ns   = h->hdr?h->hdr->ns:NULL;
-                                       char *hdr_name = Z_STRVAL(h->function_name);
+                                       char *hdr_name = Z_TYPE(h->function_name) == IS_STRING
+                                               ? Z_STRVAL(h->function_name) : NULL;
                                        HashTable *ht = NULL;
 
                                        if (Z_TYPE(h->retval) == IS_OBJECT &&