mcelog_selinux(8)

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

💖 mcelog_selinux — the manual page, but make it make sense 💖

okay so this is mcelog_selinux(8), bestie — it's the SELinux policy page for the mcelog processes, and I'm gonna walk you through literally every single thing on it. grab a snack, we're going in 🍓

✨ NAME ✨

mcelog_selinux — Security Enhanced Linux Policy for the mcelog processes 🎀

🌸 DESCRIPTION 🌸

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

The mcelog processes execute with the mcelog_t SELinux type. you can check if you have these processes running by executing the ps command with the -Z qualifier. it's giving "just look at it with the right flag" 💅

for example:

ps -eZ | grep mcelog_t

🦋 ENTRYPOINTS 🦋

The mcelog_t SELinux type can be entered via the mcelog_exec_t file type. that's the doorway, periodt.

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

/usr/bin/mcelog

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system. yes, every vibe gets a label 🌈

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

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

The following process types are defined for mcelog:

mcelog_t
Note: semanage permissive -a mcelog_t can be used to make the process type mcelog_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 but it still tells on you 😭 the audacity.

✨ BOOLEANS ✨

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

  • mcelog_client — if you want to determine whether mcelog supports client mode, you must turn on the mcelog_client boolean. Disabled by default. flip it like:
setsebool -P mcelog_client 1
  • mcelog_foreground — if you want to determine whether mcelog can use all the user ttys, you must turn on the mcelog_foreground boolean. Disabled by default. like so:
setsebool -P mcelog_foreground 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. set it with:
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. go go go:
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. as follows:
setsebool -P nis_enabled 1

💅 MANAGED FILES 💅

The SELinux process type mcelog_t can manage files labeled with the following file types. the paths listed are the default paths for these file types. Note: the process's UID still needs to have DAC permissions — SELinux said "not my department" 🙈

  • 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
  • mcelog_var_run_t
/run/mcelog.*
  • root_t
/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp
  • sysfs_t
/sys(/.*)?

🧚 FILE CONTEXTS 🧚

SELinux requires files to have an extended attribute to define the file type. yes, files have vibes too and you can read them ✨

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 mcelog policy is very flexible, allowing users to setup their mcelog processes in as secure a method as possible. we stan flexibility 💖

🎀 STANDARD FILE CONTEXT 🎀

SELinux defines the file context types for the mcelog. if you wanted to store files with these types in different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. two-step process, both steps matter, don't skip the second one 😤

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

The following file types are defined for mcelog:

  • mcelog_etc_t — set files with the mcelog_etc_t type if you want to store mcelog files in the /etc directories.
  • mcelog_exec_t — set files with the mcelog_exec_t type if you want to transition an executable to the mcelog_t domain. this is the entrypoint icon of the group 🔥
  • mcelog_initrc_exec_t — set files with the mcelog_initrc_exec_t type if you want to transition an executable to the mcelog_initrc_t domain.
  • mcelog_log_t — set files with the mcelog_log_t type if you want to treat the data as mcelog log data, usually stored under the /var/log directory.
  • mcelog_var_run_t — set files with the mcelog_var_run_t type if you want to store the mcelog 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, bestie — know the difference or you'll be confused later 😭

🌈 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 don't do terminals (respectfully) 🫶

⭐ AUTHOR ⭐

This manual page was auto-generated using sepolicy manpage. not me being written by a script and still serving looks 💀✨

💜 SEE ALSO 💜

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

and that's the whole page, bestie, you ate it up 🍓💅 this was mcelog_selinux(8), version mcelog, dated 26-10-06 — go forth and label responsibly, mwah 💖👑

📦 where this page comes from