1 # android user-space log manager 2 type logd, domain, domain_deprecated, mlstrustedsubject; 3 type logd_exec, exec_type, file_type; 4 5 init_daemon_domain(logd) 6 7 # Read access to pseudo filesystems. 8 r_dir_file(logd, proc) 9 r_dir_file(logd, proc_net) 10 11 allow logd self:capability { setuid setgid sys_nice audit_control }; 12 allow logd self:capability2 syslog; 13 allow logd self:netlink_audit_socket { create_socket_perms nlmsg_write }; 14 allow logd kernel:system syslog_read; 15 allow logd kmsg_device:chr_file w_file_perms; 16 allow logd system_data_file:file r_file_perms; 17 # logpersist is only allowed on userdebug and eng builds 18 userdebug_or_eng(` 19 allow logd misc_logd_file:file create_file_perms; 20 allow logd misc_logd_file:dir rw_dir_perms; 21 ') 22 allow logd pstorefs:dir search; 23 allow logd pstorefs:file r_file_perms; 24 25 # Set persist.sys. and sys.powerctl 26 set_prop(logd, safemode_prop) 27 set_prop(logd, powerctl_prop) 28 29 # Access device logging gating property 30 get_prop(logd, device_logging_prop) 31 userdebug_or_eng(`get_prop(logd, logpersistd_logging_prop)') 32 33 r_dir_file(logd, domain) 34 35 allow logd kernel:system syslog_mod; 36 37 control_logd(logd) 38 39 # case where logpersistd is actually logcat -f in logd context (nee: logcatd) 40 userdebug_or_eng(` 41 unix_socket_connect(logd, logdr, logd) 42 ') 43 44 ### 45 ### Neverallow rules 46 ### 47 ### logd should NEVER do any of this 48 49 # Block device access. 50 neverallow logd dev_type:blk_file { read write }; 51 52 # ptrace any other app 53 neverallow logd domain:process ptrace; 54 55 # Write to /system. 56 neverallow logd system_file:dir_file_class_set write; 57 58 # Write to files in /data/data or system files on /data 59 neverallow logd { app_data_file system_data_file }:dir_file_class_set write; 60 61 # logd is not allowed to write anywhere other than /data/misc/logd, and then 62 # only on userdebug or eng builds 63 neverallow logd { file_type -logd_tmpfs userdebug_or_eng(` -misc_logd_file -coredump_file ') }:file { create write append }; 64 65 # logpersist is only allowed on userdebug/eng builds 66 neverallow { domain userdebug_or_eng(`-logd -shell -dumpstate') } misc_logd_file:file no_rw_file_perms; 67 neverallow { domain userdebug_or_eng(`-logd') } misc_logd_file:dir { add_name link relabelfrom remove_name rename reparent rmdir write }; 68 neverallow { domain -init } misc_logd_file:dir create; 69
