lttng_ses...d_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

💖 NAME 💖

okay bestie, welcome to the lttng_ses...d_selinux(8) manual page — yes the name is a whole mood, and yes it's literally Security Enhanced Linux Policy for the lttng_sessiond processes. slay.

✨ DESCRIPTION ✨

Security-Enhanced Linux secures the lttng_sessiond processes via flexible mandatory access control. no cap, that's the whole vibe.

The lttng_sessiond processes execute with the lttng_sessiond_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. it's giving "quick vibe check" and honestly? iconic.

For example:

ps -eZ | grep lttng_sessiond_t

🚪 ENTRYPOINTS 🚪

The lttng_sessiond_t SELinux type can be entered via the lttng_sessiond_exec_t file type. that's the door, bestie.

The default entrypoint paths for the lttng_sessiond_t domain are the following:

/usr/bin/lttng-sessiond

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. yes, every process gets its own little main character era.

You can see the context of a process using the -Z option to ps.

Policy governs the access confined processes have to files. SELinux lttng_sessiond policy is very flexible allowing users to setup their lttng_sessiond processes in as secure a method as possible.

The following process types are defined for lttng_sessiond:

  • lttng_sessiond_t
Note: semanage permissive -a lttng_sessiond_t can be used to make the process type lttng_sessiond_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it's chill but it's still snitching. 🙈

🔘 BOOLEANS 🔘

SELinux policy is customizable based on least access required. lttng_sessiond policy is extremely flexible and has several booleans that allow you to manipulate the policy and run lttng_sessiond with the tightest access possible. we love a customizable queen. 💅

If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.

setsebool -P daemons_dontaudit_scheduling 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.

setsebool -P nis_enabled 1

📁 MANAGED FILES 📁

The SELinux process type lttng_sessiond_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note the processes UID still need to have DAC permissions. like, SELinux isn't doing all the work, bestie. 😭

  • cluster_conf_t
/etc/cluster(/.*)?
  • cluster_var_lib_t
/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?
  • cluster_var_run_t
/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk
  • krb5_host_rcache_t
/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0
  • lttng_sessiond_tmpfs_t
  • lttng_sessiond_var_run_t
/run/lttng(/.*)?
  • root_t
/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

🏷️ FILE CONTEXTS 🏷️

SELinux requires files to have an extended attribute to define the file type. it's literally the file's little name tag at the function. 🎀

You can see the context of a file using the -Z option to ls.

Policy governs the access confined processes have to these files. SELinux lttng_sessiond policy is very flexible allowing users to setup their lttng_sessiond processes in as secure a method as possible.

🌸 STANDARD FILE CONTEXT 🌸

SELinux defines the file context types for the lttng_sessiond, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.

semanage fcontext -a -t lttng_sessiond_exec_t '/srv/lttng_sessiond/content(/.*)?'
restorecon -R -v /srv/mylttng_sessiond_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies rise. ✨

The following file types are defined for lttng_sessiond:

  • lttng_sessiond_exec_t
    • Set files with the lttng_sessiond_exec_t type, if you want to transition an executable to the lttng_sessiond_t domain.
  • lttng_sessiond_tmpfs_t
    • Set files with the lttng_sessiond_tmpfs_t type, if you want to store lttng sessiond files on a tmpfs file system.
  • lttng_sessiond_unit_file_t
    • Set files with the lttng_sessiond_unit_file_t type, if you want to treat the files as lttng sessiond unit content.
  • lttng_sessiond_var_run_t
    • Set files with the lttng_sessiond_var_run_t type, if you want to store the lttng sessiond files under the /run or /var/run directory.
Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels. temporary vs permanent, choose your fighter. 💀

💻 COMMANDS 💻

semanage fcontext can also be used to manipulate default file context mappings.

semanage permissive can also be used to manipulate whether or not a process type is permissive.

semanage module can also be used to enable/disable/install/remove policy modules.

semanage boolean can also be used to manipulate the booleans.

system-config-selinux is a GUI tool available to customize SELinux policy settings. ooh, a GUI? fancy. 💅

✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage. not me being literally generated by the machine. 😭✨

👀 SEE ALSO 👀

selinux(8), lttng_sessiond(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

okay that's the whole page bestie, you ate. this little rewrite was brought to you by the lttng_sessiond manual source, dated 26-10-06, and the lttng_ses...d_selinux(8) header energy. periodt. 🫶💖

📦 where this page comes from