logd.te revision 2e00e6373faa6271d7839d33c5b9e69d998ff020 
1# android user-space log manager
2type logd, domain, mlstrustedsubject;
3type logd_exec, exec_type, file_type;
4
5# Read access to pseudo filesystems.
6r_dir_file(logd, cgroup)
7r_dir_file(logd, proc)
8r_dir_file(logd, proc_meminfo)
9r_dir_file(logd, proc_net)
10
11allow logd self:capability { setuid setgid setpcap sys_nice audit_control };
12allow logd self:capability2 syslog;
13allow logd self:netlink_audit_socket { create_socket_perms_no_ioctl nlmsg_write };
14allow logd kernel:system syslog_read;
15allow logd kmsg_device:chr_file w_file_perms;
16allow logd system_data_file:{ file lnk_file } r_file_perms;
17# logpersist is only allowed on userdebug and eng builds
18userdebug_or_eng(`
19  allow logd misc_logd_file:file create_file_perms;
20  allow logd misc_logd_file:dir rw_dir_perms;
21')
22allow logd pstorefs:dir search;
23allow logd pstorefs:file r_file_perms;
24
25# Access device logging gating property
26get_prop(logd, device_logging_prop)
27userdebug_or_eng(`get_prop(logd, logpersistd_logging_prop)')
28
29r_dir_file(logd, domain)
30
31allow logd kernel:system syslog_mod;
32
33control_logd(logd)
34
35# case where logpersistd is actually logcat -f in logd context (nee: logcatd)
36userdebug_or_eng(`
37  unix_socket_connect(logd, logdr, logd)
38')
39
40###
41### Neverallow rules
42###
43### logd should NEVER do any of this
44
45# Block device access.
46neverallow logd dev_type:blk_file { read write };
47
48# ptrace any other app
49neverallow logd domain:process ptrace;
50
51# ... and nobody may ptrace me (except on userdebug or eng builds)
52neverallow { domain userdebug_or_eng(`-debuggerd') } logd:process ptrace;
53
54# Write to /system.
55neverallow logd system_file:dir_file_class_set write;
56
57# Write to files in /data/data or system files on /data
58neverallow logd { app_data_file system_data_file }:dir_file_class_set write;
59
60# logpersist is only allowed on userdebug/eng builds
61neverallow { domain userdebug_or_eng(`-logd -shell -dumpstate') } misc_logd_file:file no_rw_file_perms;
62neverallow { domain userdebug_or_eng(`-logd') } misc_logd_file:dir { add_name link relabelfrom remove_name rename reparent rmdir write };
63neverallow { domain -init } misc_logd_file:dir create;
64