ff146962b2
This is needed to be able to scan the labels we have
permission on.
Denial:
04-06 12:52:22.674 874 874 W traced_probes: type=1400 audit(0.0:10314): avc: denied { search } for name="backup" dev="sda45" ino=6422529 scontext=u:r:traced_probes:s0 tcontext=u:object_r:backup_data_file:s0 tclass=dir permissive=0
Bug: 73625480
99 lines
3.7 KiB
Text
99 lines
3.7 KiB
Text
# Perfetto tracing probes, has tracefs access.
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type traced_probes_exec, exec_type, file_type;
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# Allow init to exec the daemon.
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init_daemon_domain(traced_probes)
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# Write trace data to the Perfetto traced damon. This requires connecting to its
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# producer socket and obtaining a (per-process) tmpfs fd.
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allow traced_probes traced:fd use;
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allow traced_probes traced_tmpfs:file { read write getattr map };
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unix_socket_connect(traced_probes, traced_producer, traced)
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# Allow traced_probes to access tracefs.
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allow traced_probes debugfs_tracing:dir r_dir_perms;
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allow traced_probes debugfs_tracing:file rw_file_perms;
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allow traced_probes debugfs_trace_marker:file getattr;
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# TODO(primiano): temporarily I/O tracing categories are still
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# userdebug only until we nail down the blacklist/whitelist.
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userdebug_or_eng(`
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allow traced_probes debugfs_tracing_debug:file rw_file_perms;
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')
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# Allow traced_probes to start with a higher scheduling class and then downgrade
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# itself.
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allow traced_probes self:global_capability_class_set { sys_nice };
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# Allow procfs access
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r_dir_file(traced_probes, domain)
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# Allow to log to kernel dmesg when starting / stopping ftrace.
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allow traced_probes kmsg_device:chr_file write;
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# Allow traced_probes to list the system partition.
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allow traced_probes system_file:dir { open read };
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# Allow traced_probes to list some of the data partition.
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allow traced_probes self:capability dac_read_search;
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allow traced_probes apk_data_file:dir { getattr open read search };
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allow traced_probes dalvikcache_data_file:dir { getattr open read search };
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userdebug_or_eng(`
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allow traced_probes system_data_file:dir { getattr open read search };
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')
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allow traced_probes system_app_data_file:dir { getattr open read search };
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allow traced_probes backup_data_file:dir { getattr open read search };
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allow traced_probes bootstat_data_file:dir { getattr open read search };
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allow traced_probes update_engine_data_file:dir { getattr open read search };
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allow traced_probes update_engine_log_data_file:dir { getattr open read search };
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allow traced_probes user_profile_data_file:dir { getattr open read search };
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# Allow traced_probes to run atrace. atrace pokes at system services to enable
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# their userspace TRACE macros.
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domain_auto_trans(traced_probes, atrace_exec, atrace);
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# This is needed for: path="/system/bin/linker64"
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# scontext=u:r:atrace:s0 tcontext=u:r:traced_probes:s0 tclass=fd
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allow atrace traced_probes:fd use;
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###
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### Neverallow rules
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###
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### traced_probes should NEVER do any of this
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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 traced_probes self:process execmem;
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# Block device access.
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neverallow traced_probes dev_type:blk_file { read write };
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# ptrace any other app
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neverallow traced_probes domain:process ptrace;
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# Disallows access to /data files.
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neverallow traced_probes {
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data_file_type
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-apk_data_file
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-dalvikcache_data_file
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-system_data_file
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-system_app_data_file
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-backup_data_file
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-bootstat_data_file
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-update_engine_data_file
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-update_engine_log_data_file
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-user_profile_data_file
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# TODO(b/72998741) Remove vendor_data_file exemption. Further restricted in a
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# subsequent neverallow. Currently only getattr and search are allowed.
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-vendor_data_file
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-zoneinfo_data_file
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}:dir *;
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neverallow traced_probes system_data_file:dir ~{ getattr userdebug_or_eng(`open read') search };
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neverallow traced_probes zoneinfo_data_file:dir ~r_dir_perms;
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neverallow traced_probes { data_file_type -zoneinfo_data_file }:lnk_file *;
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neverallow traced_probes { data_file_type -zoneinfo_data_file }:file *;
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# Only init is allowed to enter the traced_probes domain via exec()
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neverallow { domain -init } traced_probes:process transition;
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neverallow * traced_probes:process dyntransition;
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