Allow system_server => su grep
diff --git a/sepolicy/su.te b/sepolicy/su.te
index 3e85cd4..6da7f6d 100644
--- a/sepolicy/su.te
+++ b/sepolicy/su.te
@@ -29,6 +29,7 @@
 
 allow phhsu_daemon { system_api_service app_api_service system_server_service }:service_manager find;
 
+allow system_server phhsu_daemon:fifo_file { read write };
 allow system_server phhsu_daemon:fd use;
 allow system_server phhsu_daemon:binder { call transfer };
 allow system_server shell_devpts:chr_file { read write };