platform_system_sepolicy/public/logpersist.te

# android debug logging, logpersist domains
type logpersist, domain;

###
### Neverallow rules
###
### logpersist should NEVER do any of this

# Block device access.
neverallow logpersist dev_type:blk_file { read write };

# ptrace any other app
neverallow logpersist domain:process ptrace;

# Write to files in /data/data or system files on /data except misc_logd_file
neverallow logpersist { privapp_data_file app_data_file system_data_file }:dir_file_class_set write;

# Only init should be allowed to enter the logpersist domain via exec()
# Following is a list of debug domains we know that transition to logpersist
# neverallow_with_undefined_domains {
#   domain
#   -init       # goldfish, logcatd, raft
#   -mmi        # bat, mtp8996, msmcobalt
#   -system_app # Smith.apk
# } logpersist:process transition;
neverallow * logpersist:process dyntransition;