init: add init_rw_inherited_stream_socket

policy/modules/system/init.if

@@ -889,6 +889,24 @@ interface(`init_dgram_send',`
 	allow $1 init_t:unix_stream_socket getattr;
 ')
 
+########################################
+## <summary>
+##	Read and write to inherited init unix streams.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`init_rw_inherited_stream_socket',`
+	gen_require(`
+		type init_t;
+	')
+
+	allow $1 init_t:unix_stream_socket { getattr read write ioctl };
+')
+
 ########################################
 ## <summary>
 ##	Allow the specified domain to read/write to