xref: /aosp_15_r20/system/sepolicy/private/heapprofd.te (revision e4a36f4174b17bbab9dc043f4a65dc8d87377290)

# Android heap profiling daemon. go/heapprofd.
type heapprofd_exec, exec_type, file_type, system_file_type;
type heapprofd_tmpfs, file_type;

init_daemon_domain(heapprofd)
tmpfs_domain(heapprofd)

# Allow apps in other MLS contexts (for multi-user) to access
# shared memory buffers created by heapprofd.
typeattribute heapprofd_tmpfs mlstrustedobject;

set_prop(heapprofd, heapprofd_prop);

# Necessary for /proc/[pid]/cmdline access & sending signals.
typeattribute heapprofd mlstrustedsubject;

# Allow sending signals to processes. This excludes SIGKILL, SIGSTOP and
# SIGCHLD, which are controlled by separate permissions.
allow heapprofd self:capability kill;

# When scanning /proc/[pid]/cmdline to find matching processes for by-name
# profiling, only allowlisted domains will be allowed by SELinux. Avoid
# spamming logs with denials for entries that we can not access.
dontaudit heapprofd domain:dir { search open };

# Write trace data to the Perfetto traced daemon. This requires connecting to
# its producer socket and obtaining a (per-process) tmpfs fd.
perfetto_producer(heapprofd)

# When handling profiling for all processes, heapprofd needs to read
# executables/libraries/etc to do stack unwinding.
r_dir_file(heapprofd, nativetest_data_file)
r_dir_file(heapprofd, system_file_type)
r_dir_file(heapprofd, apk_data_file)
r_dir_file(heapprofd, dalvikcache_data_file)
r_dir_file(heapprofd, vendor_file_type)
r_dir_file(heapprofd, shell_test_data_file)
# ART apex files and directory access to the containing /data/misc/apexdata.
r_dir_file(heapprofd, apex_art_data_file)
allow heapprofd apex_module_data_file:dir { getattr search };

# Some dex files are not world-readable.
# We are still constrained by the SELinux rules above.
allow heapprofd self:global_capability_class_set dac_read_search;

# For checking profileability.
allow heapprofd packages_list_file:file r_file_perms;

# Never allow profiling privileged or otherwise incompatible domains.
# Corresponding allow-rule is in private/domain.te.
never_profile_heap(`{
  apexd
  app_zygote
  bpfloader
  hal_configstore_server
  init
  kernel
  keystore
  llkd
  logd
  logpersist
  recovery
  recovery_persist
  recovery_refresh
  ueventd
  vendor_init
  vold
  webview_zygote
  zygote
}')

full_treble_only(`
  neverallow heapprofd vendor_file_type:file no_w_file_perms;
  neverallow heapprofd { vendor_file_type -vndk_sp_file }:file no_x_file_perms;
')