d93ef542ba
These denials occur fairly often, causing some logspam.
Bug: 77225170
Test: Boot device.
Merged-In: Icd73a992aee44007d0873743f706758f9a19a112
Change-Id: Icd73a992aee44007d0873743f706758f9a19a112
(cherry picked from commit a66d1a4543)
135 lines
6.2 KiB
Text
135 lines
6.2 KiB
Text
###
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### Untrusted_app_all.
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###
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### This file defines the rules shared by all untrusted app domains except
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### apps which target the v2 security sandbox (ephemeral_app for instant apps,
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### untrusted_v2_app for fully installed v2 apps).
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### Apps are labeled based on mac_permissions.xml (maps signer and
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### optionally package name to seinfo value) and seapp_contexts (maps UID
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### and optionally seinfo value to domain for process and type for data
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### directory). The untrusted_app_all attribute is assigned to all default
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### seapp_contexts for any app with UID between APP_AID (10000)
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### and AID_ISOLATED_START (99000) if the app has no specific seinfo
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### value as determined from mac_permissions.xml. In current AOSP, this
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### attribute is assigned to all non-system apps as well as to any system apps
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### that are not signed by the platform key. To move
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### a system app into a specific domain, add a signer entry for it to
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### mac_permissions.xml and assign it one of the pre-existing seinfo values
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### or define and use a new seinfo value in both mac_permissions.xml and
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### seapp_contexts.
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###
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### Note that rules that should apply to all untrusted apps must be in app.te or also
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### added to untrusted_v2_app.te and ephemeral_app.te.
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# Legacy text relocations
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allow untrusted_app_all apk_data_file:file execmod;
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# Some apps ship with shared libraries and binaries that they write out
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# to their sandbox directory and then execute.
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allow untrusted_app_all app_data_file:file { rx_file_perms execmod };
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# ASEC
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allow untrusted_app_all asec_apk_file:file r_file_perms;
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allow untrusted_app_all asec_apk_file:dir r_dir_perms;
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# Execute libs in asec containers.
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allow untrusted_app_all asec_public_file:file { execute execmod };
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# Used by Finsky / Android "Verify Apps" functionality when
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# running "adb install foo.apk".
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# TODO: Long term, we don't want apps probing into shell data files.
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# Figure out a way to remove these rules.
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allow untrusted_app_all shell_data_file:file r_file_perms;
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allow untrusted_app_all shell_data_file:dir r_dir_perms;
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# Allow traceur to pass file descriptors through a content provider to untrusted apps
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# for the purpose of sharing files through e.g. gmail
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allow untrusted_app_all trace_data_file:file { getattr read };
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# untrusted apps should not be able to open trace data files, they should depend
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# upon traceur to pass a file descriptor
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neverallow untrusted_app_all trace_data_file:dir *;
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neverallow untrusted_app_all trace_data_file:file { no_w_file_perms open };
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# Allow to read staged apks.
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allow untrusted_app_all { apk_tmp_file apk_private_tmp_file }:file {read getattr};
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# Read and write system app data files passed over Binder.
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# Motivating case was /data/data/com.android.settings/cache/*.jpg for
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# cropping or taking user photos.
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allow untrusted_app_all system_app_data_file:file { read write getattr };
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#
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# Rules migrated from old app domains coalesced into untrusted_app.
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# This includes what used to be media_app, shared_app, and release_app.
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#
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# Access to /data/media.
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allow untrusted_app_all media_rw_data_file:dir create_dir_perms;
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allow untrusted_app_all media_rw_data_file:file create_file_perms;
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# Traverse into /mnt/media_rw for bypassing FUSE daemon
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# TODO: narrow this to just MediaProvider
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allow untrusted_app_all mnt_media_rw_file:dir search;
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# allow cts to query all services
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allow untrusted_app_all servicemanager:service_manager list;
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allow untrusted_app_all audioserver_service:service_manager find;
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allow untrusted_app_all cameraserver_service:service_manager find;
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allow untrusted_app_all drmserver_service:service_manager find;
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allow untrusted_app_all mediaserver_service:service_manager find;
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allow untrusted_app_all mediaextractor_service:service_manager find;
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allow untrusted_app_all mediacodec_service:service_manager find;
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allow untrusted_app_all mediametrics_service:service_manager find;
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allow untrusted_app_all mediadrmserver_service:service_manager find;
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allow untrusted_app_all nfc_service:service_manager find;
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allow untrusted_app_all radio_service:service_manager find;
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allow untrusted_app_all app_api_service:service_manager find;
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allow untrusted_app_all vr_manager_service:service_manager find;
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# Allow GMS core to access perfprofd output, which is stored
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# in /data/misc/perfprofd/. GMS core will need to list all
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# data stored in that directory to process them one by one.
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userdebug_or_eng(`
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allow untrusted_app_all perfprofd_data_file:file r_file_perms;
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allow untrusted_app_all perfprofd_data_file:dir r_dir_perms;
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')
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# gdbserver for ndk-gdb ptrace attaches to app process.
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allow untrusted_app_all self:process ptrace;
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# Cts: HwRngTest
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allow untrusted_app_all sysfs_hwrandom:dir search;
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allow untrusted_app_all sysfs_hwrandom:file r_file_perms;
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# Allow apps to view preloaded media content
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allow untrusted_app_all preloads_media_file:dir r_dir_perms;
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allow untrusted_app_all preloads_media_file:file r_file_perms;
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allow untrusted_app_all preloads_data_file:dir search;
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# Allow untrusted apps read / execute access to /vendor/app for there can
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# be pre-installed vendor apps that package a library within themselves.
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# TODO (b/37784178) Consider creating a special type for /vendor/app installed
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# apps.
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allow untrusted_app_all vendor_app_file:dir { open getattr read search };
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allow untrusted_app_all vendor_app_file:file { open getattr read execute };
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allow untrusted_app_all vendor_app_file:lnk_file { open getattr read };
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# Write app-specific trace data to the Perfetto traced damon. This requires
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# connecting to its producer socket and obtaining a (per-process) tmpfs fd.
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allow untrusted_app_all traced:fd use;
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allow untrusted_app_all traced_tmpfs:file { read write getattr map };
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unix_socket_connect(untrusted_app_all, traced_producer, traced)
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# allow untrusted apps to use UDP sockets provided by the system server but not
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# modify them other than to connect
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allow untrusted_app_all system_server:udp_socket { connect getattr read recvfrom sendto write };
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# This is allowed for targetSdkVersion <= 25 but disallowed on newer versions.
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dontaudit untrusted_app_all net_dns_prop:file read;
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# These have been disallowed since Android O.
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# For P, we assume that apps are safely handling the denial.
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dontaudit untrusted_app_all proc_stat:file read;
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dontaudit untrusted_app_all proc_vmstat:file read;
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dontaudit untrusted_app_all proc_uptime:file read;
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