rolekit_selinux(8)

📦 version 38.1.87, in centos-stream 9

💅 rolekit_selinux — the SELinux glow-up for rolekit 💅

okay so bestie, welcome to rolekit_selinux(8), the man page for the Security Enhanced Linux Policy for the rolekit processes. yes that's a mouthful. no i will not be shortening it. 🎀

✨ NAME ✨

rolekit_selinux — Security Enhanced Linux Policy for the rolekit processes. that's it. that's the whole name. iconic behavior honestly.

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the rolekit processes via flexible mandatory access control. like, SELinux is the friend who checks your outfit before you leave the house, except it's checking syscalls. 💅

The rolekit processes execute with the rolekit_t SELinux type. wanna check if you've got these processes running? just run the ps command with the -Z qualifier. easy peasy.

for example:

ps -eZ | grep rolekit_t

see? look at you go. 🦋

🚪 ENTRYPOINTS 🚪

The rolekit_t SELinux type can be entered via the rolekit_exec_t file type. that's the doorway. that's the vibe check at the club entrance.

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

/usr/sbin/roled

one path. one single path. living that minimal life. ✨

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. everyone gets a little label. it's giving name tags at a party.

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

Policy governs the access confined processes have to files. SELinux rolekit policy is very flexible allowing users to setup their rolekit processes in as secure a method as possible. lowkey obsessed with how configurable this is.

The following process types are defined for rolekit:

rolekit_t
Note: semanage permissive -a rolekit_t can be used to make the process type rolekit_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it stops yelling at you but it's still taking notes. 📝

🎚️ BOOLEANS 🎚️

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

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 deny user domains applications to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla, you must turn on the deny_execmem boolean. Disabled by default.

setsebool -P deny_execmem 1
seriously, that one's dangerous. report it in bugzilla. don't just vibe with it. 😭

If you want to control the ability to mmap a low area of the address space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on the mmap_low_allowed boolean. Disabled by default.

setsebool -P mmap_low_allowed 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

If you want to disable kernel module loading, you must turn on the secure_mode_insmod boolean. Disabled by default.

setsebool -P secure_mode_insmod 1

If you want to allow unconfined executables to make their heap memory executable. Doing this is a really bad idea. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla, you must turn on the selinuxuser_execheap boolean. Disabled by default.

setsebool -P selinuxuser_execheap 1
bestie. bestie no. that's the bad one. 🚩

If you want to allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla, you must turn on the selinuxuser_execstack boolean. Enabled by default.

setsebool -P selinuxuser_execstack 1

like i said — never, ever necessary. remember that. 💀

📁 MANAGED FILES 📁

The SELinux process type rolekit_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. SELinux isn't out here overriding your regular perms, she's just adding a layer. 💜

  • file_type
    • all files on the system

yeah. all of them. main character energy fr fr. 👑

🗂️ FILE CONTEXTS 🗂️

SELinux requires files to have an extended attribute to define the file type. every file needs its little label. it's giving ✨accessorizing✨.

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

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for the rolekit, 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 rolekit_unit_file_t '/srv/myrolekit_content(/.*)?'
restorecon -R -v /srv/myrolekit_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies stay winning. 🧚

The following file types are defined for rolekit:

  • rolekit_exec_t — Set files with the rolekit_exec_t type, if you want to transition an executable to the rolekit_t domain.
  • rolekit_tmp_t — Set files with the rolekit_tmp_t type, if you want to store rolekit temporary files in the /tmp directories.
  • rolekit_unit_file_t — Set files with the rolekit_unit_file_t type, if you want to treat the files as rolekit unit content.
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, know the difference bestie. 🙈

🛠️ 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. a whole GUI. for the girlies who prefer clicking. 🖱️💖

✍️ AUTHOR ✍️

This manual page was auto-generated using sepolicy manpage.

(no human wrote this. a robot did. and honestly? it ate. 🤖✨)

🔗 SEE ALSO 🔗

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

go read those too. iykyk. 📚

okay that's the whole page bestie!! mwah!! this little love letter to SELinux dropped as rolekit, dated 26-10-23, and it answers to the name rolekit_selinux(8) — go forth and label responsibly 🫶💖🎀

📦 where this page comes from