c5cb5a248d
Give perfetto rw dir and create file permissions for new directory. Give system server control to read, write, search, unlink files from new directory. Test: locally ensure traces can be written by perfetto and accessed and deleted by system server Bug: 293957254 Change-Id: Id015429b48ffffb73e7a71addddd48a22e4740bf
146 lines
5.4 KiB
Text
146 lines
5.4 KiB
Text
# Perfetto command-line client. Can be used only from the domains that are
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# explicitly allowlisted with a domain_auto_trans(X, perfetto_exec, perfetto).
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# This command line client accesses the privileged socket of the traced
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# daemon.
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type perfetto_exec, system_file_type, exec_type, file_type;
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type perfetto_tmpfs, file_type;
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tmpfs_domain(perfetto);
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# Allow init to start a trace (for perfetto_boottrace).
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init_daemon_domain(perfetto)
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# Allow to access traced's privileged consumer socket.
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unix_socket_connect(perfetto, traced_consumer, traced)
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# Connect to the Perfetto traced daemon as a producer. This requires
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# connecting to its producer socket and obtaining a (per-process) tmpfs fd.
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perfetto_producer(perfetto)
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# Allow to write and unlink traces into /data/misc/perfetto-traces.
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allow perfetto perfetto_traces_data_file:dir rw_dir_perms;
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allow perfetto perfetto_traces_data_file:file create_file_perms;
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# Allow to write and unlink trace into /data/misc/perfetto-traces/bugreport*
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allow perfetto perfetto_traces_bugreport_data_file:file create_file_perms;
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allow perfetto perfetto_traces_bugreport_data_file:dir rw_dir_perms;
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# Allow to write and unlink traces into /data/misc/perfetto-traces/profiling.
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allow perfetto perfetto_traces_profiling_data_file:dir rw_dir_perms;
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allow perfetto perfetto_traces_profiling_data_file:file create_file_perms;
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# Allow perfetto to access the proxy service for reporting traces.
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allow perfetto tracingproxy_service:service_manager find;
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binder_use(perfetto)
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binder_call(perfetto, system_server)
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# Allow perfetto to read the trace config from /data/misc/perfetto-configs.
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# shell and adb can write files into that directory.
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allow perfetto perfetto_configs_data_file:dir r_dir_perms;
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allow perfetto perfetto_configs_data_file:file r_file_perms;
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# Allow perfetto to read the trace config from statsd, mm_events and shell
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# (both root and non-root) on stdin and also to write the resulting trace to
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# stdout.
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allow perfetto { statsd mm_events shell su }:fd use;
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allow perfetto { statsd mm_events shell su system_server }:fifo_file { getattr read write ioctl };
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# Allow to communicate use, read and write over the adb connection.
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allow perfetto adbd:fd use;
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allow perfetto adbd:unix_stream_socket { read write };
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# Allow adbd to reap perfetto.
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allow perfetto adbd:process { sigchld };
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# Allow perfetto to write to statsd.
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unix_socket_send(perfetto, statsdw, statsd)
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# Allow to access /dev/pts when launched in an adb shell.
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allow perfetto devpts:chr_file rw_file_perms;
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# Allow perfetto to ask incidentd to start a report.
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# TODO(lalitm): remove all incidentd rules when proxy service is stable.
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allow perfetto incident_service:service_manager find;
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binder_call(perfetto, incidentd)
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# perfetto log formatter calls isatty() on its stderr. Denial when running
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# under adbd is harmless. Avoid generating denial logs.
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dontaudit perfetto adbd:unix_stream_socket getattr;
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dontauditxperm perfetto adbd:unix_stream_socket ioctl unpriv_tty_ioctls;
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# As above, when adbd is running in "su" domain (only the ioctl is denied in
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# practice).
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dontauditxperm perfetto su:unix_stream_socket ioctl unpriv_tty_ioctls;
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# Similarly, CTS tests end up hitting a denial on shell pipes.
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dontauditxperm perfetto shell:fifo_file ioctl unpriv_tty_ioctls;
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###
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### Neverallow rules
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###
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# Disallow anyone else from being able to handle traces except selected system
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# components.
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neverallow {
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domain
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-init # The creator of the folder.
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-perfetto # The owner of the folder.
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-adbd # For pulling traces.
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-shell # For devepment purposes.
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-traced # For write_into_file traces.
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-dumpstate # For attaching traces to bugreports.
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-incidentd # For receiving reported traces. TODO(lalitm): remove this.
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-priv_app # For stating traces for bug-report UI.
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-system_server # For accessing traces started by profiling apis.
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} perfetto_traces_data_file:dir *;
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neverallow {
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domain
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-init # The creator of the folder.
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-perfetto # The owner of the folder.
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-adbd # For pulling traces.
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-shell # For devepment purposes.
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-traced # For write_into_file traces.
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-incidentd # For receiving reported traces. TODO(lalitm): remove this.
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} perfetto_traces_data_file:file ~{ getattr read };
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### perfetto should NEVER do any of the following
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# Disallow mapping executable memory (execstack and exec are already disallowed
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# globally in domain.te).
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neverallow perfetto self:process execmem;
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# Block device access.
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neverallow perfetto dev_type:blk_file { read write };
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# ptrace any other process
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neverallow perfetto domain:process ptrace;
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# Disallows access to other /data files.
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neverallow perfetto {
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data_file_type
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-system_data_file
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-system_data_root_file
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-media_userdir_file
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-system_userdir_file
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-vendor_userdir_file
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# TODO(b/72998741) Remove exemption. Further restricted in a subsequent
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# neverallow. Currently only getattr and search are allowed.
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-vendor_data_file
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-perfetto_traces_data_file
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-perfetto_traces_bugreport_data_file
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-perfetto_traces_profiling_data_file
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-perfetto_configs_data_file
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with_native_coverage(`-method_trace_data_file')
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}:dir *;
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neverallow perfetto {
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system_data_file
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-perfetto_traces_data_file
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-perfetto_traces_profiling_data_file
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}:dir ~{ getattr search };
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neverallow perfetto {
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data_file_type
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-perfetto_traces_data_file
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-perfetto_traces_bugreport_data_file
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-perfetto_traces_profiling_data_file
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-perfetto_configs_data_file
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with_native_coverage(`-method_trace_data_file')
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}:file ~write;
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