ksmtuned_selinux(8)

💖 ksmtuned_selinux(8) — the manual, but make it cute 💖

okay so this is the manual for ksmtuned_selinux, section 8, and it's literally all about the SELinux policy for ksmtuned processes. bestie, if you're here, you probably need to know how SELinux keeps ksmtuned on a leash, and I'm about to spill all the tea. 💅

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✨ NAME ✨

ksmtuned_selinux — Security Enhanced Linux Policy for the ksmtuned processes. that's the whole name, no cap. 🫶

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🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the ksmtuned processes via flexible mandatory access control. it's giving "we don't just hope for the best, we enforce it." ✨

The ksmtuned processes execute with the ksmtuned_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 ksmtuned_t

literally just run that and you'll see if ksmtuned is out here with its main character energy. 👑

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🦋 ENTRYPOINTS 🦋

The ksmtuned_t SELinux type can be entered via the ksmtuned_exec_t file type.

the default entrypoint paths for the ksmtuned_t domain are the following:

/usr/bin/ksmtuned

that's the door, bestie. 🚪💖

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👑 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 ksmtuned policy is very flexible allowing users to setup their ksmtuned processes in as secure a method as possible. highkey obsessed with how customizable this is. 🌈

the following process types are defined for ksmtuned:

ksmtuned_t

Note: semanage permissive -a ksmtuned_t can be used to make the process type ksmtuned_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it's not a free pass, it's just a "we're still watching you" vibe. 😭

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🎀 BOOLEANS 🎀

SELinux policy is customizable based on least access required. ksmtuned policy is extremely flexible and has several booleans that allow you to manipulate the policy and run ksmtuned with the tightest access possible. it's giving "trust issues, but make it secure." 🔥

• ksmtuned_use_cifs — if you want to allow ksmtuned to use cifs/Samba file systems, you must turn on the ksmtuned_use_cifs boolean. Disabled by default.

setsebool -P ksmtuned_use_cifs 1

• ksmtuned_use_nfs — if you want to allow ksmtuned to use nfs file systems, you must turn on the ksmtuned_use_nfs boolean. Disabled by default.

setsebool -P ksmtuned_use_nfs 1

• daemons_dontaudit_scheduling — 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

• fips_mode — 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

• nis_enabled — 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

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🍓 MANAGED FILES 🍓

The SELinux process type ksmtuned_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. so like, SELinux is the bouncer, but DAC still checks your ID. 🙈

• 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

• ksmtuned_var_run_t

/run/ksmtune.pid

• root_t

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

• sysfs_t

/sys(/.*)?

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🌈 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 ksmtuned policy is very flexible allowing users to setup their ksmtuned processes in as secure a method as possible. it's literally the "know your files, know your vibe" section. 🎀

✨ STANDARD FILE CONTEXT ✨

SELinux defines the file context types for the ksmtuned, 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 ksmtuned_exec_t '/srv/ksmtuned/content(/.*)?'
restorecon -R -v /srv/myksmtuned_content

Note: SELinux often uses regular expressions to specify labels that match multiple files. regex is that girl. 💅

the following file types are defined for ksmtuned:

• ksmtuned_exec_t — Set files with the ksmtuned_exec_t type, if you want to transition an executable to the ksmtuned_t domain.
• ksmtuned_initrc_exec_t — Set files with the ksmtuned_initrc_exec_t type, if you want to transition an executable to the ksmtuned_initrc_t domain.
• ksmtuned_log_t — Set files with the ksmtuned_log_t type, if you want to treat the data as ksmtuned log data, usually stored under the /var/log directory.
• ksmtuned_unit_file_t — Set files with the ksmtuned_unit_file_t type, if you want to treat the files as ksmtuned unit content.
• ksmtuned_var_run_t — Set files with the ksmtuned_var_run_t type, if you want to store the ksmtuned 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. so chcon is the quick fix, semanage + restorecon is the forever vibe. periodt. 🫶

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💜 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. for the besties who prefer clicking over typing. 🖱️✨

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⭐ AUTHOR ⭐

This manual page was auto-generated using sepolicy manpage . like, the computer wrote it, but I'm here to make it cute. 💖

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🔥 SEE ALSO 🔥

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

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that's the whole manual, bestie! this was ksmtuned_selinux, version dated 26-10-06, and the manual name is ksmtuned. stay secure, slay, and don't forget to restorecon! 💅✨