tuned_selinux(8)

1tuned_selinux(8)             SELinux Policy tuned             tuned_selinux(8)
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NAME

6       tuned_selinux - Security Enhanced Linux Policy for the tuned processes
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DESCRIPTION

9       Security-Enhanced Linux secures the tuned processes via flexible manda‐
10       tory access control.
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12       The tuned processes execute with the  tuned_t  SELinux  type.  You  can
13       check  if  you have these processes running by executing the ps command
14       with the -Z qualifier.
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16       For example:
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18       ps -eZ | grep tuned_t
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ENTRYPOINTS

23       The tuned_t SELinux type can be entered via the tuned_exec_t file type.
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25       The default entrypoint paths for the tuned_t domain are the following:
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27       /usr/sbin/tuned
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PROCESS TYPES

30       SELinux defines process types (domains) for each process running on the
31       system
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33       You can see the context of a process using the -Z option to ps
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35       Policy  governs  the  access confined processes have to files.  SELinux
36       tuned policy is very flexible allowing users to setup their tuned  pro‐
37       cesses in as secure a method as possible.
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39       The following process types are defined for tuned:
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41       tuned_t
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43       Note:  semanage  permissive  -a tuned_t can be used to make the process
44       type tuned_t permissive. SELinux does not  deny  access  to  permissive
45       process  types, but the AVC (SELinux denials) messages are still gener‐
46       ated.
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BOOLEANS

50       SELinux policy is customizable based on least access  required.   tuned
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run tuned with the tightest access possible.
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56       If you want to allow users to resolve user passwd entries directly from
57       ldap  rather  then  using  a  sssd server, you must turn on the authlo‐
58       gin_nsswitch_use_ldap boolean. Disabled by default.
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60       setsebool -P authlogin_nsswitch_use_ldap 1
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64       If you want to allow all daemons to write corefiles to /, you must turn
65       on the daemons_dump_core boolean. Disabled by default.
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67       setsebool -P daemons_dump_core 1
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71       If  you  want  to enable cluster mode for daemons, you must turn on the
72       daemons_enable_cluster_mode boolean. Enabled by default.
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74       setsebool -P daemons_enable_cluster_mode 1
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78       If you want to allow all daemons to use tcp wrappers, you must turn  on
79       the daemons_use_tcp_wrapper boolean. Disabled by default.
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81       setsebool -P daemons_use_tcp_wrapper 1
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84
85       If  you  want to allow all daemons the ability to read/write terminals,
86       you must turn on the daemons_use_tty boolean. Disabled by default.
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88       setsebool -P daemons_use_tty 1
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92       If you want to deny user domains applications to map a memory region as
93       both  executable  and  writable,  this  is dangerous and the executable
94       should be reported in bugzilla, you must turn on the deny_execmem bool‐
95       ean. Enabled by default.
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97       setsebool -P deny_execmem 1
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101       If  you  want  to deny any process from ptracing or debugging any other
102       processes, you  must  turn  on  the  deny_ptrace  boolean.  Enabled  by
103       default.
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105       setsebool -P deny_ptrace 1
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109       If  you  want  to  allow  any  process  to mmap any file on system with
110       attribute file_type, you must turn on the  domain_can_mmap_files  bool‐
111       ean. Enabled by default.
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113       setsebool -P domain_can_mmap_files 1
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117       If  you want to allow all domains write to kmsg_device, while kernel is
118       executed with systemd.log_target=kmsg parameter, you must turn  on  the
119       domain_can_write_kmsg boolean. Disabled by default.
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121       setsebool -P domain_can_write_kmsg 1
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125       If you want to allow all domains to use other domains file descriptors,
126       you must turn on the domain_fd_use boolean. Enabled by default.
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128       setsebool -P domain_fd_use 1
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132       If you want to allow all domains to have the kernel load  modules,  you
133       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
134       default.
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136       setsebool -P domain_kernel_load_modules 1
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140       If you want to allow all domains to execute in fips_mode, you must turn
141       on the fips_mode boolean. Enabled by default.
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143       setsebool -P fips_mode 1
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147       If you want to enable reading of urandom for all domains, you must turn
148       on the global_ssp boolean. Disabled by default.
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150       setsebool -P global_ssp 1
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154       If you want to allow confined applications to run  with  kerberos,  you
155       must turn on the kerberos_enabled boolean. Enabled by default.
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157       setsebool -P kerberos_enabled 1
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161       If  you  want  to control the ability to mmap a low area of the address
162       space, as configured by /proc/sys/vm/mmap_min_addr, you  must  turn  on
163       the mmap_low_allowed boolean. Disabled by default.
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165       setsebool -P mmap_low_allowed 1
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168
169       If  you  want  to  allow  system  to run with NIS, you must turn on the
170       nis_enabled boolean. Disabled by default.
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172       setsebool -P nis_enabled 1
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175
176       If you want to allow confined applications to use nscd  shared  memory,
177       you must turn on the nscd_use_shm boolean. Disabled by default.
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179       setsebool -P nscd_use_shm 1
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182
183       If  you  want  to  disable  kernel module loading, you must turn on the
184       secure_mode_insmod boolean. Enabled by default.
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186       setsebool -P secure_mode_insmod 1
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189
190       If you want to boolean to determine whether the system permits  loading
191       policy,  setting enforcing mode, and changing boolean values.  Set this
192       to true and you have to reboot to set it back, you  must  turn  on  the
193       secure_mode_policyload boolean. Enabled by default.
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195       setsebool -P secure_mode_policyload 1
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199       If  you  want to allow unconfined executables to make their heap memory
200       executable.  Doing this is a really  bad  idea.  Probably  indicates  a
201       badly  coded  executable, but could indicate an attack. This executable
202       should  be  reported  in  bugzilla,  you  must  turn  on   the   selin‐
203       uxuser_execheap boolean. Disabled by default.
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205       setsebool -P selinuxuser_execheap 1
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208
209       If  you  want  to  allow  all  unconfined  executables to use libraries
210       requiring text relocation that are  not  labeled  textrel_shlib_t,  you
211       must turn on the selinuxuser_execmod boolean. Enabled by default.
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213       setsebool -P selinuxuser_execmod 1
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216
217       If  you  want  to allow unconfined executables to make their stack exe‐
218       cutable.  This should never, ever be necessary.  Probably  indicates  a
219       badly  coded  executable, but could indicate an attack. This executable
220       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
221       stack boolean. Enabled by default.
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223       setsebool -P selinuxuser_execstack 1
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226
227       If you want to support X userspace object manager, you must turn on the
228       xserver_object_manager boolean. Enabled by default.
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230       setsebool -P xserver_object_manager 1
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MANAGED FILES

235       The SELinux process type tuned_t can manage files labeled with the fol‐
236       lowing  file  types.   The paths listed are the default paths for these
237       file types.  Note the processes UID still need to have DAC permissions.
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239       file_type
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241            all files on the system
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FILE CONTEXTS

245       SELinux requires files to have an extended attribute to define the file
246       type.
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248       You can see the context of a file using the -Z option to ls
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250       Policy  governs  the  access  confined  processes  have to these files.
251       SELinux tuned policy is very flexible allowing  users  to  setup  their
252       tuned processes in as secure a method as possible.
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254       EQUIVALENCE DIRECTORIES
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256
257       tuned  policy  stores  data  with multiple different file context types
258       under the /var/log/tuned directory.  If you would  like  to  store  the
259       data  in a different directory you can use the semanage command to cre‐
260       ate an equivalence mapping.  If you wanted to store this data under the
261       /srv dirctory you would execute the following command:
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263       semanage fcontext -a -e /var/log/tuned /srv/tuned
264       restorecon -R -v /srv/tuned
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266       tuned  policy  stores  data  with multiple different file context types
267       under the /var/run/tuned directory.  If you would  like  to  store  the
268       data  in a different directory you can use the semanage command to cre‐
269       ate an equivalence mapping.  If you wanted to store this data under the
270       /srv dirctory you would execute the following command:
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272       semanage fcontext -a -e /var/run/tuned /srv/tuned
273       restorecon -R -v /srv/tuned
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275       STANDARD FILE CONTEXT
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277       SELinux  defines the file context types for the tuned, if you wanted to
278       store files with these types in a diffent paths, you  need  to  execute
279       the  semanage  command  to  sepecify  alternate  labeling  and then use
280       restorecon to put the labels on disk.
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282       semanage fcontext -a -t tuned_var_run_t '/srv/mytuned_content(/.*)?'
283       restorecon -R -v /srv/mytuned_content
284
285       Note: SELinux often uses regular expressions  to  specify  labels  that
286       match multiple files.
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288       The following file types are defined for tuned:
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292       tuned_etc_t
293
294       - Set files with the tuned_etc_t type, if you want to store tuned files
295       in the /etc directories.
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299       tuned_exec_t
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301       - Set files with the tuned_exec_t type, if you want  to  transition  an
302       executable to the tuned_t domain.
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306       tuned_initrc_exec_t
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308       -  Set  files with the tuned_initrc_exec_t type, if you want to transi‐
309       tion an executable to the tuned_initrc_t domain.
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313       tuned_log_t
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315       - Set files with the tuned_log_t type, if you want to treat the data as
316       tuned log data, usually stored under the /var/log directory.
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318
319       Paths:
320            /var/log/tuned(/.*)?, /var/log/tuned.log.*
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323       tuned_rw_etc_t
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325       - Set files with the tuned_rw_etc_t type, if you want to store tuned rw
326       files in the /etc directories.
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330       tuned_tmp_t
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332       - Set files with the tuned_tmp_t type, if you want to store tuned  tem‐
333       porary files in the /tmp directories.
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337       tuned_var_run_t
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339       -  Set  files  with  the tuned_var_run_t type, if you want to store the
340       tuned files under the /run or /var/run directory.
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343       Paths:
344            /var/run/tuned(/.*)?, /var/run/tuned.pid
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346
347       Note: File context can be temporarily modified with the chcon  command.
348       If  you want to permanently change the file context you need to use the
349       semanage fcontext command.  This will modify the SELinux labeling data‐
350       base.  You will need to use restorecon to apply the labels.
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352

COMMANDS

354       semanage  fcontext  can also be used to manipulate default file context
355       mappings.
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357       semanage permissive can also be used to manipulate  whether  or  not  a
358       process type is permissive.
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360       semanage  module can also be used to enable/disable/install/remove pol‐
361       icy modules.
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363       semanage boolean can also be used to manipulate the booleans
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365
366       system-config-selinux is a GUI tool available to customize SELinux pol‐
367       icy settings.
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369

AUTHOR

371       This manual page was auto-generated using sepolicy manpage .
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