DO NOT MERGE Fake 29.0 sepolicy prebuilts
I took current AOSP policy as base, then removed sepolicy so that the
set of type and attributes was a subset of types and attributes in Q
sepolicy, with exception of those that have not yet been cleand up in
current AOSP:
mediaswcodec_server
netd_socket
mediaextractor_update_service
thermalserviced
thermalserviced_exec
Bug: 133196056
Test: n/a
Change-Id: I2cbe749777684146114c89e1e6fc3f07400c0ae5
diff --git a/prebuilts/api/29.0/private/isolated_app.te b/prebuilts/api/29.0/private/isolated_app.te
new file mode 100644
index 0000000..94b49b0
--- /dev/null
+++ b/prebuilts/api/29.0/private/isolated_app.te
@@ -0,0 +1,153 @@
+###
+### Services with isolatedProcess=true in their manifest.
+###
+### This file defines the rules for isolated apps. An "isolated
+### app" is an APP with UID between AID_ISOLATED_START (99000)
+### and AID_ISOLATED_END (99999).
+###
+
+typeattribute isolated_app coredomain;
+
+app_domain(isolated_app)
+
+# Access already open app data files received over Binder or local socket IPC.
+allow isolated_app { app_data_file privapp_data_file }:file { append read write getattr lock map };
+
+allow isolated_app activity_service:service_manager find;
+allow isolated_app display_service:service_manager find;
+allow isolated_app webviewupdate_service:service_manager find;
+
+# Google Breakpad (crash reporter for Chrome) relies on ptrace
+# functionality. Without the ability to ptrace, the crash reporter
+# tool is broken.
+# b/20150694
+# https://code.google.com/p/chromium/issues/detail?id=475270
+allow isolated_app self:process ptrace;
+
+# b/32896414: Allow accessing sdcard file descriptors passed to isolated_apps
+# by other processes. Open should never be allowed, and is blocked by
+# neverallow rules below.
+# media_rw_data_file is included for sdcardfs, and can be removed if sdcardfs
+# is modified to change the secontext when accessing the lower filesystem.
+allow isolated_app { sdcard_type media_rw_data_file }:file { read write append getattr lock map };
+
+# For webviews, isolated_app processes can be forked from the webview_zygote
+# in addition to the zygote. Allow access to resources inherited from the
+# webview_zygote process. These rules are specialized copies of the ones in app.te.
+# Inherit FDs from the webview_zygote.
+allow isolated_app webview_zygote:fd use;
+# Notify webview_zygote of child death.
+allow isolated_app webview_zygote:process sigchld;
+# Inherit logd write socket.
+allow isolated_app webview_zygote:unix_dgram_socket write;
+# Read system properties managed by webview_zygote.
+allow isolated_app webview_zygote_tmpfs:file read;
+
+# Inherit FDs from the app_zygote.
+allow isolated_app app_zygote:fd use;
+# Notify app_zygote of child death.
+allow isolated_app app_zygote:process sigchld;
+# Inherit logd write socket.
+allow isolated_app app_zygote:unix_dgram_socket write;
+
+# TODO (b/63631799) fix this access
+# suppress denials to /data/local/tmp
+dontaudit isolated_app shell_data_file:dir search;
+
+# Write app-specific trace data to the Perfetto traced damon. This requires
+# connecting to its producer socket and obtaining a (per-process) tmpfs fd.
+allow isolated_app traced:fd use;
+allow isolated_app traced_tmpfs:file { read write getattr map };
+unix_socket_connect(isolated_app, traced_producer, traced)
+
+# Allow heap profiling if the main app has been marked as profileable or
+# debuggable.
+can_profile_heap(isolated_app)
+
+allow isolated_app ashmem_device:chr_file { getattr read ioctl lock map append write };
+
+#####
+##### Neverallow
+#####
+
+# Isolated apps should not directly open app data files themselves.
+neverallow isolated_app { app_data_file privapp_data_file }:file open;
+
+# Only allow appending to /data/anr/traces.txt (b/27853304, b/18340553)
+# TODO: are there situations where isolated_apps write to this file?
+# TODO: should we tighten these restrictions further?
+neverallow isolated_app anr_data_file:file ~{ open append };
+neverallow isolated_app anr_data_file:dir ~search;
+
+# Isolated apps must not be permitted to use HwBinder
+neverallow isolated_app hwbinder_device:chr_file *;
+neverallow isolated_app *:hwservice_manager *;
+
+# Isolated apps must not be permitted to use VndBinder
+neverallow isolated_app vndbinder_device:chr_file *;
+
+# Isolated apps must not be permitted to perform actions on Binder and VndBinder service_manager
+# except the find actions for services whitelisted below.
+neverallow isolated_app *:service_manager ~find;
+
+# b/17487348
+# Isolated apps can only access three services,
+# activity_service, display_service, webviewupdate_service, and
+# ashmem_device_service.
+neverallow isolated_app {
+ service_manager_type
+ -activity_service
+ -ashmem_device_service
+ -display_service
+ -webviewupdate_service
+}:service_manager find;
+
+# Isolated apps shouldn't be able to access the driver directly.
+neverallow isolated_app gpu_device:chr_file { rw_file_perms execute };
+
+# Do not allow isolated_app access to /cache
+neverallow isolated_app cache_file:dir ~{ r_dir_perms };
+neverallow isolated_app cache_file:file ~{ read getattr };
+
+# Do not allow isolated_app to access external storage, except for files passed
+# via file descriptors (b/32896414).
+neverallow isolated_app { storage_file mnt_user_file sdcard_type }:dir ~getattr;
+neverallow isolated_app { storage_file mnt_user_file }:file_class_set *;
+neverallow isolated_app sdcard_type:{ devfile_class_set lnk_file sock_file fifo_file } *;
+neverallow isolated_app sdcard_type:file ~{ read write append getattr lock map };
+
+# Do not allow USB access
+neverallow isolated_app { usb_device usbaccessory_device }:chr_file *;
+
+# Restrict the webview_zygote control socket.
+neverallow isolated_app webview_zygote:sock_file write;
+
+# Limit the /sys files which isolated_app can access. This is important
+# for controlling isolated_app attack surface.
+neverallow isolated_app {
+ sysfs_type
+ -sysfs_devices_system_cpu
+ -sysfs_transparent_hugepage
+ -sysfs_usb # TODO: check with audio team if needed for isolated_app (b/28417852)
+}:file no_rw_file_perms;
+
+# No creation of sockets families other than AF_UNIX sockets.
+# List taken from system/sepolicy/public/global_macros - socket_class_set
+# excluding unix_stream_socket and unix_dgram_socket.
+# Many of these are socket families which have never and will never
+# be compiled into the Android kernel.
+neverallow isolated_app self:{
+ socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket
+ key_socket appletalk_socket netlink_route_socket
+ netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket
+ netlink_selinux_socket netlink_audit_socket netlink_dnrt_socket
+ netlink_kobject_uevent_socket tun_socket netlink_iscsi_socket
+ netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket
+ netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket
+ netlink_crypto_socket sctp_socket icmp_socket ax25_socket ipx_socket
+ netrom_socket atmpvc_socket x25_socket rose_socket decnet_socket atmsvc_socket
+ rds_socket irda_socket pppox_socket llc_socket can_socket tipc_socket
+ bluetooth_socket iucv_socket rxrpc_socket isdn_socket phonet_socket
+ ieee802154_socket caif_socket alg_socket nfc_socket vsock_socket kcm_socket
+ qipcrtr_socket smc_socket xdp_socket
+} create;