smbmount_selinux(8)

🌸 smbmount_selinux — the SELinux glow-up for smbmount 💅

Okay bestie, so this is the smbmount_selinux(8) manual page from the SELinux Policy smbmount collection — it's literally the whole vibe guide for how SELinux handles your smbmount processes, and we're gonna get into all of it. No skips, no shortcuts. Periodt. ✨

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💖 NAME 💖

smbmount_selinux — Security Enhanced Linux Policy for the smbmount processes. It's giving "I'm the policy in charge here," and honestly? She ate. 👑

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🦋 DESCRIPTION 🦋

Security-Enhanced Linux secures the smbmount processes via flexible mandatory access control. Like, it's not just a suggestion — it's mandatory, bestie, the name is right there. 💀

The smbmount processes execute with the smbmount_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 smbmount_t

Run that and you'll see exactly which processes are living their smbmount_t truth. Go off, little processes. 🎀

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🧚 ENTRYPOINTS 🧚

The smbmount_t SELinux type can be entered via the smbmount_exec_t file type. So that's the doorway, that's the entrance, that's the velvet rope. 🪩

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

/usr/bin/smbmnt, /usr/bin/smbmount

Those are the spots where the magic happens. Iconic paths, honestly. 🌟

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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 smbmount policy is very flexible allowing users to setup their smbmount processes in as secure a method as possible. Flexible and secure? We love a multitasking queen. 💅

The following process types are defined for smbmount:

• smbmount_t

Note: semanage permissive -a smbmount_t can be used to make the process type smbmount_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

So like, permissive mode is the "go off but I'm still watching you" energy. The denials still get logged — SELinux is nosy and we respect it. 👀

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🌈 BOOLEANS 🌈

SELinux policy is customizable based on least access required. smbmount policy is extremely flexible and has several booleans that allow you to manipulate the policy and run smbmount with the tightest access possible. Tightest access = main character security energy. 🔒

• 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

Two booleans, two little switches, two opportunities to customize your life. The -P is important btw — it makes it persistent so it survives a reboot. No cap. 🫶

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🎀 MANAGED FILES 🎀

The SELinux process type smbmount_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 is powerful but it's not doing everything for you, bestie — DAC still exists and she still has opinions. 🙈

💜 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

That's a whole lotta cache paths and honestly? She's collecting them like Pokémon. 🍓

🌸 samba_log_t 🌸

/var/log/samba(/.*)?

Logs! The receipts! We stan a documented queen. 📝

✨ samba_secrets_t ✨

/etc/samba/smbpasswd
/etc/samba/passdb.tdb
/etc/samba/MACHINE.SID
/etc/samba/secrets.tdb

Secrets, secrets, secrets — this is the confidential group chat of file types and we are NOT screenshotting. 🤫

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🦋 FILE CONTEXTS 🦋

SELinux requires files to have an extended attribute to define the file type. Yes, every file has a whole vibe check attached to it. It's giving labels-on-labels-on-labels. 💖

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

🧚 STANDARD FILE CONTEXT 🧚

SELinux defines the file context types for the smbmount, 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 smbmount_exec_t '/srv/smbmount/content(/.*)?'
restorecon -R -v /srv/mysmbmount_content

So you tell semanage what the label should be, then restorecon actually slaps it on. Tag team, dream team. 🫶

Note: SELinux often uses regular expressions to specify labels that match multiple files.

Regex my beloved. She's matching multiple files and she's not sorry. 💅

The following file types are defined for smbmount:

• smbmount_exec_t — Set files with the smbmount_exec_t type, if you want to transition an executable to the smbmount_t domain.

Paths:

/usr/bin/smbmnt, /usr/bin/smbmount

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 cute temporary tattoo and semanage fcontext + restorecon is the real permanent ink. Choose wisely. ⭐

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👑 COMMANDS 👑

Okay so here's the whole squad of tools you can use to manipulate this policy — collect them all, they're each doing their own iconic thing:

• 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.

The semanage family runs the whole operation and system-config-selinux is the friend who shows up with a nice GUI so you don't have to touch the terminal. We love options. 🌈

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💀 AUTHOR 💀

This manual page was auto-generated using sepolicy manpage. Authored by the machine itself. The robot did it. And she did it flawlessly, let's be real. 🤖✨

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💜 SEE ALSO 💜

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

Go read those too — cross-referencing is self-care, bestie. 🎀

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💖 and that's the whole smbmount SELinux situation, bestie 💖

This lil' masterpiece is from the smbmount manual, version 26-10-06, dated 26-10-06 — so it's vintage at this point, a true collector's item. Now go forth and manage your file contexts responsibly. Mwah. 💋