342362ae3e
kernel commit 2a4c22426955d4fc04069811997b7390c0fb858e (fs: switch order of CAP_DAC_OVERRIDE and CAP_DAC_READ_SEARCH checks) swapped the order of dac_override and dac_read_search checks. Domains that have dac_override will now generate spurious denials for dac_read_search unless they also have that permission. Since dac_override is a strict superset of dac_read_search, grant dac_read_search to all domains that already have dac_override to get rid of the denials. Bug: 114280985 Bug: crbug.com/877588 Test: Booted on a device running 4.14. Change-Id: I5c1c136b775cceeb7f170e139e8d4279e73267a4
119 lines
4.4 KiB
Text
119 lines
4.4 KiB
Text
# perfprofd - perf profile collection daemon
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type perfprofd, domain;
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type perfprofd_exec, exec_type, file_type;
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userdebug_or_eng(`
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typeattribute perfprofd coredomain;
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typeattribute perfprofd mlstrustedsubject;
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# perfprofd access to sysfs directory structure.
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allow perfprofd sysfs_type:dir search;
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# perfprofd needs to control CPU hot-plug in order to avoid kernel
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# perfevents problems in cases where CPU goes on/off during measurement;
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# this means read access to /sys/devices/system/cpu/possible
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# and read/write access to /sys/devices/system/cpu/cpu*/online
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allow perfprofd sysfs_devices_system_cpu:file rw_file_perms;
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# perfprofd checks for the existence of and then invokes simpleperf;
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# simpleperf retains perfprofd domain after exec
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allow perfprofd system_file:file rx_file_perms;
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# perfprofd reads a config file from /data/data/com.google.android.gms/files
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allow perfprofd { privapp_data_file app_data_file }:file r_file_perms;
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allow perfprofd { privapp_data_file app_data_file }:dir search;
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allow perfprofd self:global_capability_class_set { dac_override dac_read_search };
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# perfprofd opens a file for writing in /data/misc/perfprofd
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allow perfprofd perfprofd_data_file:file create_file_perms;
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allow perfprofd perfprofd_data_file:dir rw_dir_perms;
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# perfprofd uses the system log
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read_logd(perfprofd);
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write_logd(perfprofd);
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# perfprofd inspects /sys/power/wake_unlock
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wakelock_use(perfprofd);
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# perfprofd looks at thermals.
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allow perfprofd sysfs_thermal:dir r_dir_perms;
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# perfprofd gets charging status.
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hal_client_domain(perfprofd, hal_health)
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# simpleperf reads kernel notes.
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allow perfprofd sysfs_kernel_notes:file r_file_perms;
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# Simpleperf & perfprofd query a range of proc stats.
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allow perfprofd proc_loadavg:file r_file_perms;
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allow perfprofd proc_stat:file r_file_perms;
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allow perfprofd proc_modules:file r_file_perms;
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# simpleperf writes to perf_event_paranoid under /proc.
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allow perfprofd proc_perf:file write;
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# Simpleperf: kptr_restrict. This would be required to dump kernel symbols.
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dontaudit perfprofd proc_security:file *;
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# simpleperf uses ioctl() to turn on kernel perf events measurements
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allow perfprofd self:global_capability_class_set sys_admin;
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# simpleperf needs to examine /proc to collect task/thread info
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r_dir_file(perfprofd, domain)
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# simpleperf needs to access /proc/<pid>/exec
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allow perfprofd self:global_capability_class_set { sys_resource sys_ptrace };
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neverallow perfprofd domain:process ptrace;
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# simpleperf needs open/read any file that turns up in a profile
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# to see whether it has a build ID
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allow perfprofd exec_type:file r_file_perms;
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# App & ART artifacts.
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r_dir_file(perfprofd, apk_data_file)
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r_dir_file(perfprofd, dalvikcache_data_file)
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# Vendor libraries.
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r_dir_file(perfprofd, vendor_file)
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# Vendor apps.
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r_dir_file(perfprofd, vendor_app_file)
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# simpleperf will set security.perf_harden to enable access to perf_event_open()
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set_prop(perfprofd, shell_prop)
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# simpleperf examines debugfs on startup to collect tracepoint event types
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r_dir_file(perfprofd, debugfs_tracing)
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r_dir_file(perfprofd, debugfs_tracing_debug)
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# simpleperf is going to execute "sleep"
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allow perfprofd toolbox_exec:file rx_file_perms;
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# simpleperf is going to execute "mv" on a temp file
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allow perfprofd shell_exec:file rx_file_perms;
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# needed for simpleperf on some kernels
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allow perfprofd self:global_capability_class_set ipc_lock;
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# simpleperf attempts to put a temp file into /data/local/tmp. Do not allow,
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# use the fallback cwd code, do not spam the log. But ensure this is correctly
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# removed at some point. b/70232908.
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dontaudit perfprofd shell_data_file:dir *;
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dontaudit perfprofd shell_data_file:file *;
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# Allow perfprofd to publish a binder service and make binder calls.
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binder_use(perfprofd)
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add_service(perfprofd, perfprofd_service)
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# Use devpts for streams from cmd.
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#
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# This is normally granted to binderservicedomain, but this service
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# has tighter restrictions on the callers (see below), so must enable
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# this manually.
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allow perfprofd devpts:chr_file rw_file_perms;
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# Use socket & pipe supplied by su, for cmd perfprofd dump.
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allow perfprofd su:unix_stream_socket { read write getattr sendto };
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allow perfprofd su:fifo_file r_file_perms;
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# Allow perfprofd to submit to dropbox.
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allow perfprofd dropbox_service:service_manager find;
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binder_call(perfprofd, system_server)
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