1*e4a36f41SAndroid Build Coastguard Worker# Perfetto user-space tracing daemon (unprivileged) 2*e4a36f41SAndroid Build Coastguard Worker 3*e4a36f41SAndroid Build Coastguard Worker# type traced is defined under /public (because iorapd rules 4*e4a36f41SAndroid Build Coastguard Worker# under public/ need to refer to it). 5*e4a36f41SAndroid Build Coastguard Workertype traced_exec, system_file_type, exec_type, file_type; 6*e4a36f41SAndroid Build Coastguard Worker 7*e4a36f41SAndroid Build Coastguard Worker# Allow init to exec the daemon. 8*e4a36f41SAndroid Build Coastguard Workerinit_daemon_domain(traced) 9*e4a36f41SAndroid Build Coastguard Workertmpfs_domain(traced) 10*e4a36f41SAndroid Build Coastguard Worker 11*e4a36f41SAndroid Build Coastguard Worker# Allow apps in other MLS contexts (for multi-user) to access 12*e4a36f41SAndroid Build Coastguard Worker# share memory buffers created by traced. 13*e4a36f41SAndroid Build Coastguard Workertypeattribute traced_tmpfs mlstrustedobject; 14*e4a36f41SAndroid Build Coastguard Worker 15*e4a36f41SAndroid Build Coastguard Worker# Allow traced to start with a lower scheduling class and change 16*e4a36f41SAndroid Build Coastguard Worker# class accordingly to what defined in the config provided by 17*e4a36f41SAndroid Build Coastguard Worker# the privileged process that controls it. 18*e4a36f41SAndroid Build Coastguard Workerallow traced self:global_capability_class_set { sys_nice }; 19*e4a36f41SAndroid Build Coastguard Worker 20*e4a36f41SAndroid Build Coastguard Worker# Allow to pass a file descriptor for the output trace from "perfetto" (the 21*e4a36f41SAndroid Build Coastguard Worker# cmdline client) and other shell binaries to traced and let traced write 22*e4a36f41SAndroid Build Coastguard Worker# directly into that (rather than returning the trace contents over the socket). 23*e4a36f41SAndroid Build Coastguard Workerallow traced perfetto:fd use; 24*e4a36f41SAndroid Build Coastguard Workerallow traced shell:fd use; 25*e4a36f41SAndroid Build Coastguard Workerallow traced shell:fifo_file { read write }; 26*e4a36f41SAndroid Build Coastguard Worker 27*e4a36f41SAndroid Build Coastguard Worker# Allow the service to create new files within /data/misc/perfetto-traces. 28*e4a36f41SAndroid Build Coastguard Workerallow traced perfetto_traces_data_file:file create_file_perms; 29*e4a36f41SAndroid Build Coastguard Workerallow traced perfetto_traces_data_file:dir rw_dir_perms; 30*e4a36f41SAndroid Build Coastguard Worker# ... and /data/misc/perfetto-traces/bugreport* 31*e4a36f41SAndroid Build Coastguard Workerallow traced perfetto_traces_bugreport_data_file:file create_file_perms; 32*e4a36f41SAndroid Build Coastguard Workerallow traced perfetto_traces_bugreport_data_file:dir rw_dir_perms; 33*e4a36f41SAndroid Build Coastguard Worker 34*e4a36f41SAndroid Build Coastguard Worker# Allow traceur to pass open file descriptors to traced, so traced can directly 35*e4a36f41SAndroid Build Coastguard Worker# write into the output file without doing roundtrips over IPC. 36*e4a36f41SAndroid Build Coastguard Workerallow traced traceur_app:fd use; 37*e4a36f41SAndroid Build Coastguard Workerallow traced trace_data_file:file { read write }; 38*e4a36f41SAndroid Build Coastguard Worker 39*e4a36f41SAndroid Build Coastguard Worker# Allow perfetto to access the proxy service for notifying Traceur. 40*e4a36f41SAndroid Build Coastguard Workerallow traced tracingproxy_service:service_manager find; 41*e4a36f41SAndroid Build Coastguard Workerbinder_use(traced); 42*e4a36f41SAndroid Build Coastguard Workerbinder_call(traced, system_server); 43*e4a36f41SAndroid Build Coastguard Worker 44*e4a36f41SAndroid Build Coastguard Worker# Allow iorapd to pass memfd descriptors to traced, so traced can directly 45*e4a36f41SAndroid Build Coastguard Worker# write into the shmem buffer file without doing roundtrips over IPC. 46*e4a36f41SAndroid Build Coastguard Workerallow traced iorapd:fd use; 47*e4a36f41SAndroid Build Coastguard Workerallow traced iorapd_tmpfs:file { read write }; 48*e4a36f41SAndroid Build Coastguard Worker 49*e4a36f41SAndroid Build Coastguard Worker# Allow traced to use shared memory supplied by producers. Typically, traced 50*e4a36f41SAndroid Build Coastguard Worker# (i.e. the tracing service) creates the shared memory used for data transfer 51*e4a36f41SAndroid Build Coastguard Worker# from the producer. This rule allows an alternative scheme, where the producer 52*e4a36f41SAndroid Build Coastguard Worker# creates the shared memory, that is then adopted by traced (after validating 53*e4a36f41SAndroid Build Coastguard Worker# that it is appropriately sealed). 54*e4a36f41SAndroid Build Coastguard Worker# This list has to replicate the tmpfs domains of all applicable domains that 55*e4a36f41SAndroid Build Coastguard Worker# have perfetto_producer() macro applied to them. 56*e4a36f41SAndroid Build Coastguard Worker# perfetto_tmpfs excluded as it should never need to use the producer-supplied 57*e4a36f41SAndroid Build Coastguard Worker# shared memory scheme. 58*e4a36f41SAndroid Build Coastguard Workerallow traced { 59*e4a36f41SAndroid Build Coastguard Worker appdomain_tmpfs 60*e4a36f41SAndroid Build Coastguard Worker heapprofd_tmpfs 61*e4a36f41SAndroid Build Coastguard Worker surfaceflinger_tmpfs 62*e4a36f41SAndroid Build Coastguard Worker traced_probes_tmpfs 63*e4a36f41SAndroid Build Coastguard Worker userdebug_or_eng(`system_server_tmpfs') 64*e4a36f41SAndroid Build Coastguard Worker}:file { getattr map read write }; 65*e4a36f41SAndroid Build Coastguard Worker 66*e4a36f41SAndroid Build Coastguard Worker# Allow traced to notify Traceur when a trace ends by setting the 67*e4a36f41SAndroid Build Coastguard Worker# sys.trace.trace_end_signal property. 68*e4a36f41SAndroid Build Coastguard Workerset_prop(traced, system_trace_prop) 69*e4a36f41SAndroid Build Coastguard Worker# Allow to lazily start producers. 70*e4a36f41SAndroid Build Coastguard Workerset_prop(traced, traced_lazy_prop) 71*e4a36f41SAndroid Build Coastguard Worker 72*e4a36f41SAndroid Build Coastguard Worker# Allow traced to talk to statsd for logging metrics. 73*e4a36f41SAndroid Build Coastguard Workerunix_socket_send(traced, statsdw, statsd) 74*e4a36f41SAndroid Build Coastguard Worker 75*e4a36f41SAndroid Build Coastguard Worker### 76*e4a36f41SAndroid Build Coastguard Worker### Neverallow rules 77*e4a36f41SAndroid Build Coastguard Worker### 78*e4a36f41SAndroid Build Coastguard Worker### traced should NEVER do any of this 79*e4a36f41SAndroid Build Coastguard Worker 80*e4a36f41SAndroid Build Coastguard Worker# Disallow mapping executable memory (execstack and exec are already disallowed 81*e4a36f41SAndroid Build Coastguard Worker# globally in domain.te). 82*e4a36f41SAndroid Build Coastguard Workerneverallow traced self:process execmem; 83*e4a36f41SAndroid Build Coastguard Worker 84*e4a36f41SAndroid Build Coastguard Worker# Block device access. 85*e4a36f41SAndroid Build Coastguard Workerneverallow traced dev_type:blk_file { read write }; 86*e4a36f41SAndroid Build Coastguard Worker 87*e4a36f41SAndroid Build Coastguard Worker# ptrace any other process 88*e4a36f41SAndroid Build Coastguard Workerneverallow traced domain:process ptrace; 89*e4a36f41SAndroid Build Coastguard Worker 90*e4a36f41SAndroid Build Coastguard Worker# Disallows access to /data files, still allowing to write to file descriptors 91*e4a36f41SAndroid Build Coastguard Worker# passed through the socket. 92*e4a36f41SAndroid Build Coastguard Workerneverallow traced { 93*e4a36f41SAndroid Build Coastguard Worker data_file_type 94*e4a36f41SAndroid Build Coastguard Worker -perfetto_traces_data_file 95*e4a36f41SAndroid Build Coastguard Worker -perfetto_traces_bugreport_data_file 96*e4a36f41SAndroid Build Coastguard Worker -system_data_file 97*e4a36f41SAndroid Build Coastguard Worker -system_data_root_file 98*e4a36f41SAndroid Build Coastguard Worker # TODO(b/72998741) Remove vendor_data_file exemption. Further restricted in a 99*e4a36f41SAndroid Build Coastguard Worker # subsequent neverallow. Currently only getattr and search are allowed. 100*e4a36f41SAndroid Build Coastguard Worker -vendor_data_file 101*e4a36f41SAndroid Build Coastguard Worker -zoneinfo_data_file 102*e4a36f41SAndroid Build Coastguard Worker with_native_coverage(`-method_trace_data_file') 103*e4a36f41SAndroid Build Coastguard Worker}:dir *; 104*e4a36f41SAndroid Build Coastguard Workerneverallow traced { system_data_file }:dir ~{ getattr search }; 105*e4a36f41SAndroid Build Coastguard Workerneverallow traced zoneinfo_data_file:dir ~r_dir_perms; 106*e4a36f41SAndroid Build Coastguard Workerneverallow traced { data_file_type -zoneinfo_data_file }:lnk_file *; 107*e4a36f41SAndroid Build Coastguard Workerneverallow traced { 108*e4a36f41SAndroid Build Coastguard Worker data_file_type 109*e4a36f41SAndroid Build Coastguard Worker -zoneinfo_data_file 110*e4a36f41SAndroid Build Coastguard Worker -perfetto_traces_data_file 111*e4a36f41SAndroid Build Coastguard Worker -perfetto_traces_bugreport_data_file 112*e4a36f41SAndroid Build Coastguard Worker -trace_data_file 113*e4a36f41SAndroid Build Coastguard Worker with_native_coverage(`-method_trace_data_file') 114*e4a36f41SAndroid Build Coastguard Worker}:file ~write; 115*e4a36f41SAndroid Build Coastguard Worker 116*e4a36f41SAndroid Build Coastguard Worker# Only init is allowed to enter the traced domain via exec() 117*e4a36f41SAndroid Build Coastguard Workerneverallow { domain -init } traced:process transition; 118*e4a36f41SAndroid Build Coastguard Workerneverallow * traced:process dyntransition; 119*e4a36f41SAndroid Build Coastguard Worker 120*e4a36f41SAndroid Build Coastguard Worker# Limit the processes that can access tracingproxy_service. 121*e4a36f41SAndroid Build Coastguard Workerneverallow { domain -traced -dumpstate -traceur_app -shell -system_server } tracingproxy_service:service_manager find; 122