boinc_selinux(8)

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

💅 boinc_selinux(8) — the SELinux policy page for boinc, bestie edition

okay so this is boinc_selinux(8), from the boinc manual — and yes it's a whole SELinux policy page, but I promise it's gonna make sense 🫶

✨ NAME ✨

boinc_selinux — the Security Enhanced Linux Policy for the boinc processes. that's it, that's the whole vibe. 👑

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the boinc processes via flexible mandatory access control. yes bestie, mandatory — not the vibes-based kind. 💅

The boinc processes execute with the boinc_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep boinc_t

that -Z is literally the "show me the SELinux context" flag, iykyk 🔍

🚪 ENTRYPOINTS 🚪

The boinc_t SELinux type can be entered via the boinc_exec_t file type.

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

/usr/bin/boinc, /usr/bin/boinc_client

two doors, both iconic. 🚪✨

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system.

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

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

The following process types are defined for boinc:

boinc_t, boinc_project_t

Note: semanage permissive -a boinc_t can be used to make the process type boinc_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like… it stops blocking you but it still side-eyes you in the logs 💀

🎚️ BOOLEANS 🎚️

SELinux policy is customizable based on least access required. boinc policy is extremely flexible and has several booleans that allow you to manipulate the policy and run boinc with the tightest access possible.

If you want to determine whether boinc can execmem/execstack, you must turn on the boinc_execmem boolean. Enabled by default.

setsebool -P boinc_execmem 1

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

that -P in setsebool is the "make it permanent, bestie" flag, and the 1 is "yes turn it on". no cap. 🔥

🔌 PORT TYPES 🔌

SELinux defines port types to represent TCP and UDP ports.

You can see the types associated with a port by using the following command:

semanage port -l

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

The following port types are defined for boinc:

boinc_client_port_t

Default Defined Ports:

        tcp 1043
        udp 1034

boinc_port_t

Default Defined Ports:

        tcp 31416

31416 is giving "pi but make it a port" and honestly? slay 🥧

📁 MANAGED FILES 📁

The SELinux process type boinc_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.

boinc_log_t

     /var/log/boinc.log.*
     /var/log/boincerr.log.*

boinc_project_var_lib_t

     /var/lib/boinc/slots(/.*)?
     /var/lib/boinc/projects(/.*)?

boinc_tmp_t

boinc_tmpfs_t

boinc_var_lib_t

     /var/lib/boinc(/.*)?
     /var/lib/boinc-client(/.*)?
     /etc/boinc-client/global_prefs_override.xml

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

root_t

     /sysroot/.aleph-version.json
     /sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
     /
     /initrd
     /var/lib/ntp

that's a LOT of file types and no, we are not skipping any of them, we are thorough in this household 💅

🏷️ FILE CONTEXTS 🏷️

SELinux requires files to have an extended attribute to define the file type.

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 boinc policy is very flexible, allowing users to setup their boinc processes in as secure a method as possible.

🔁 EQUIVALENCE DIRECTORIES 🔁

boinc policy stores data with multiple different file context types under the /var/lib/boinc directory. If you would like to store the data in a different directory you can use the semanage command to create an equivalence mapping. If you wanted to store this data under the /srv directory you would execute the following command:

semanage fcontext -a -e /var/lib/boinc /srv/boinc
restorecon -R -v /srv/boinc

"-e" = equivalence, and restorecon -R -v = "go fix the labels, recursively, and tell me what you did". iconic duo fr fr 🫶

📜 STANDARD FILE CONTEXT 📜

SELinux defines the file context types for the boinc, 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 boinc_exec_t '/srv/boinc/content(/.*)?'
restorecon -R -v /srv/myboinc_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.

The following file types are defined for boinc:

boinc_exec_t

  • Set files with the boinc_exec_t type, if you want to transition an executable to the boinc_t domain.

Paths:

     /usr/bin/boinc, /usr/bin/boinc_client

boinc_initrc_exec_t

  • Set files with the boinc_initrc_exec_t type, if you want to transition an executable to the boinc_initrc_t domain.

boinc_log_t

  • Set files with the boinc_log_t type, if you want to treat the data as boinc log data, usually stored under the /var/log directory.

Paths:

     /var/log/boinc.log.*, /var/log/boincerr.log.*

boinc_project_tmp_t

  • Set files with the boinc_project_tmp_t type, if you want to store boinc project temporary files in the /tmp directories.

boinc_project_var_lib_t

  • Set files with the boinc_project_var_lib_t type, if you want to store the boinc project files under the /var/lib directory.

Paths:

     /var/lib/boinc/slots(/.*)?, /var/lib/boinc/projects(/.*)?

boinc_tmp_t

  • Set files with the boinc_tmp_t type, if you want to store boinc temporary files in the /tmp directories.

boinc_tmpfs_t

  • Set files with the boinc_tmpfs_t type, if you want to store boinc files on a tmpfs file system.

boinc_unit_file_t

  • Set files with the boinc_unit_file_t type, if you want to treat the files as boinc unit content.

boinc_var_lib_t

  • Set files with the boinc_var_lib_t type, if you want to store the boinc files under the /var/lib directory.

Paths:

     /var/lib/boinc(/.*)?, /var/lib/boinc-client(/.*)?, /etc/boinc-
     client/global_prefs_override.xml
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. so like, chcon is the fleeting vibe and semanage fcontext + restorecon is the committed relationship, no cap 💀

🛠️ 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 port can also be used to manipulate the port definitions

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings. yes, a GUI, for the girlies who prefer clicking to typing 🖱️✨

✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage .

(so nobody hand-wrote this and honestly you can tell, but we love it anyway 🫶)

👀 SEE ALSO 👀

selinux(8), boinc(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), boinc_project_selinux(8), boinc_project_selinux(8)

(yes boinc_project_selinux(8) is listed twice — that's literally what the page says, so it stays. double the icon energy I guess 🌈)

that's the whole page bestie, you ate it up 🍓 mwah 💖 and for the sign-off: this is from boinc, version/date 26-10-06, landing under boinc_selinux(8) — go forth and label responsibly 👑💜

📦 where this page comes from