platform_system_sepolicy/private/dumpstate.te
Eric Biggers f9519a6d3f Allow dumpstate to signal keystore to dump its stack
This is needed to debug hangs in keystore2.

Restricted to debuggable builds for now.

Bug: 186879912
Test: 'adb bugreport', then find the stack traces for keystore2 in the
      "VM TRACES JUST NOW" section of the main bugreport file.
Change-Id: I4434cab7e79cb4aae8bbb2e3a8abff02e0073c13
2021-05-04 21:09:35 -07:00

112 lines
3.5 KiB
Text

typeattribute dumpstate coredomain;
type dumpstate_tmpfs, file_type;
init_daemon_domain(dumpstate)
# Execute and transition to the vdc domain
domain_auto_trans(dumpstate, vdc_exec, vdc)
# Acquire advisory lock on /system/etc/xtables.lock from ip[6]tables
allow dumpstate system_file:file lock;
allow dumpstate storaged_exec:file rx_file_perms;
# /data/misc/a11ytrace for accessibility traces
userdebug_or_eng(`
allow dumpstate accessibility_trace_data_file:dir r_dir_perms;
allow dumpstate accessibility_trace_data_file:file r_file_perms;
')
# /data/misc/wmtrace for wm traces
userdebug_or_eng(`
allow dumpstate wm_trace_data_file:dir r_dir_perms;
allow dumpstate wm_trace_data_file:file r_file_perms;
')
# Allow dumpstate to make binder calls to incidentd
binder_call(dumpstate, incidentd)
# Allow dumpstate to make binder calls to storaged service
binder_call(dumpstate, storaged)
# Allow dumpstate to make binder calls to statsd
binder_call(dumpstate, statsd)
# Allow dumpstate to talk to gpuservice over binder
binder_call(dumpstate, gpuservice);
# Allow dumpstate to talk to idmap over binder
binder_call(dumpstate, idmap);
# Allow dumpstate to talk to profcollectd over binder
userdebug_or_eng(`
binder_call(dumpstate, profcollectd)
')
# Collect metrics on boot time created by init
get_prop(dumpstate, boottime_prop)
# Signal native processes to dump their stack.
allow dumpstate {
mediatranscoding
statsd
netd
}:process signal;
userdebug_or_eng(`
allow dumpstate keystore:process signal;
')
# For collecting bugreports.
allow dumpstate debugfs_wakeup_sources:file r_file_perms;
allow dumpstate dev_type:blk_file getattr;
allow dumpstate webview_zygote:process signal;
allow dumpstate sysfs_dmabuf_stats:file r_file_perms;
dontaudit dumpstate update_engine:binder call;
# Read files in /proc
allow dumpstate {
proc_net_tcp_udp
proc_pid_max
}:file r_file_perms;
# For comminucating with the system process to do confirmation ui.
binder_call(dumpstate, incidentcompanion_service)
# Set properties.
# dumpstate_prop is used to share state with the Shell app.
set_prop(dumpstate, dumpstate_prop)
set_prop(dumpstate, exported_dumpstate_prop)
# dumpstate_options_prop is used to pass extra command-line args.
set_prop(dumpstate, dumpstate_options_prop)
# Allow dumpstate to kill vendor dumpstate service by init
set_prop(dumpstate, ctl_dumpstate_prop)
# For dumping dynamic partition information.
set_prop(dumpstate, lpdumpd_prop)
binder_call(dumpstate, lpdumpd)
# For dumping device-mapper and snapshot information.
allow dumpstate gsid_exec:file rx_file_perms;
set_prop(dumpstate, ctl_gsid_prop)
binder_call(dumpstate, gsid)
r_dir_file(dumpstate, ota_metadata_file)
# For starting (and killing) perfetto --save-for-bugreport. If a labelled trace
# is being recorded, the command above will serialize it into
# /data/misc/perfetto-traces/bugreport/*.pftrace .
domain_auto_trans(dumpstate, perfetto_exec, perfetto)
allow dumpstate perfetto:process signal;
allow dumpstate perfetto_traces_data_file:dir { search };
allow dumpstate perfetto_traces_bugreport_data_file:dir rw_dir_perms;
allow dumpstate perfetto_traces_bugreport_data_file:file { r_file_perms unlink };
# When exec-ing /system/bin/perfetto, dumpstates redirects stdio to /dev/null
# (which is labelled as dumpstate_tmpfs) to avoid leaking a FD to the bugreport
# zip file. These rules are to allow perfetto.te to inherit dumpstate's
# /dev/null.
allow perfetto dumpstate_tmpfs:file rw_file_perms;
allow perfetto dumpstate:fd use;