Suppress exported_composite_name for the kernel

The kernel makes no use of this data, and ita causes allocation issues
in some cases with waste of space on the kernel side.

Fixes: https://fedorahosted.org/gss-proxy/ticket/129

Signed-off-by: Simo Sorce <[email protected]>
Reviewed-by: Nathaniel McCallum <[email protected]>

Author: simo5

proxy/src/gp_export.c

@@ -625,6 +625,16 @@ uint32_t gp_export_ctx_id_to_gssx(uint32_t *min, int type, gss_OID mech,
         if (ret_maj) {
             goto done;
         }
+        /* suppress names exported_composite_name, the kernel doesn't want
+         * this information */
+        xdr_free((xdrproc_t)xdr_gssx_buffer,
+                 (char *)&out->src_name.exported_composite_name);
+        memset(&out->src_name.exported_composite_name, 0,
+               sizeof(out->src_name.exported_composite_name));
+        xdr_free((xdrproc_t)xdr_gssx_buffer,
+                 (char *)&out->targ_name.exported_composite_name);
+        memset(&out->targ_name.exported_composite_name, 0,
+               sizeof(out->targ_name.exported_composite_name));
         break;
     default:
         ret_maj = GSS_S_FAILURE;