Add permission for NetworkStack updatability
NetworkStack will need to use netlink_tcpdiag_socket to get tcp
info. In order to support updatability for NetworkStack as it's
a mainline module, get the information from kernel directly to
reduce the dependecy with framework.
Test: Build and test if NetworkStack can get the tcp_info without
SEPolicy exception
Bug: 136162280
Change-Id: I8f584f27d5ece5e97090fb5fafe8c70c5cbbe123
diff --git a/private/network_stack.te b/private/network_stack.te
index 4fd31bd..6db7d8f 100644
--- a/private/network_stack.te
+++ b/private/network_stack.te
@@ -67,3 +67,6 @@
# dumpstate support
allow network_stack dumpstate:fd use;
allow network_stack dumpstate:fifo_file write;
+
+# Create/use netlink_tcpdiag_socket to get tcp info
+allow network_stack self:netlink_tcpdiag_socket { create_socket_perms_no_ioctl nlmsg_read nlmsg_write };
diff --git a/public/app.te b/public/app.te
index ea3cf15..030aba5 100644
--- a/public/app.te
+++ b/public/app.te
@@ -390,7 +390,7 @@
neverallow appdomain tee_device:chr_file { read write };
# Privileged netlink socket interfaces.
-neverallow appdomain
+neverallow { appdomain -network_stack }
domain:{
netlink_tcpdiag_socket
netlink_nflog_socket