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 deny user domains applications to map a memory region as
57       both  executable  and  writable,  this  is dangerous and the executable
58       should be reported in bugzilla, you must turn on the deny_execmem bool‐
59       ean. Enabled by default.
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61       setsebool -P deny_execmem 1
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65       If  you  want  to control the ability to mmap a low area of the address
66       space, as configured by /proc/sys/vm/mmap_min_addr, you  must  turn  on
67       the mmap_low_allowed boolean. Disabled by default.
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69       setsebool -P mmap_low_allowed 1
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73       If  you want to disable kernel module loading, you must turn on the se‐
74       cure_mode_insmod boolean. Enabled by default.
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76       setsebool -P secure_mode_insmod 1
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80       If you want to allow unconfined executables to make their  heap  memory
81       executable.   Doing  this  is  a  really bad idea. Probably indicates a
82       badly coded executable, but could indicate an attack.  This  executable
83       should  be  reported  in bugzilla, you must turn on the selinuxuser_ex‐
84       echeap boolean. Disabled by default.
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86       setsebool -P selinuxuser_execheap 1
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90       If you want to allow unconfined executables to make  their  stack  exe‐
91       cutable.   This  should  never, ever be necessary. Probably indicates a
92       badly coded executable, but could indicate an attack.  This  executable
93       should  be reported in bugzilla, you must turn on the selinuxuser_exec‐
94       stack boolean. Enabled by default.
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96       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

101       The SELinux process type tuned_t can manage files labeled with the fol‐
102       lowing  file  types.   The paths listed are the default paths for these
103       file types.  Note the processes UID still need to have DAC permissions.
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105       file_type
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107            all files on the system
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FILE CONTEXTS

111       SELinux requires files to have an extended attribute to define the file
112       type.
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114       You can see the context of a file using the -Z option to ls
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116       Policy  governs  the  access  confined  processes  have to these files.
117       SELinux tuned policy is very flexible allowing  users  to  setup  their
118       tuned processes in as secure a method as possible.
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120       EQUIVALENCE DIRECTORIES
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122
123       tuned policy stores data with multiple different file context types un‐
124       der the /var/log/tuned directory.  If you would like to store the  data
125       in  a different directory you can use the semanage command to create an
126       equivalence mapping.  If you wanted to store this data under  the  /srv
127       directory you would execute the following command:
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129       semanage fcontext -a -e /var/log/tuned /srv/tuned
130       restorecon -R -v /srv/tuned
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132       tuned policy stores data with multiple different file context types un‐
133       der the /var/run/tuned directory.  If you would like to store the  data
134       in  a different directory you can use the semanage command to create an
135       equivalence mapping.  If you wanted to store this data under  the  /srv
136       directory you would execute the following command:
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138       semanage fcontext -a -e /var/run/tuned /srv/tuned
139       restorecon -R -v /srv/tuned
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141       STANDARD FILE CONTEXT
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143       SELinux  defines the file context types for the tuned, if you wanted to
144       store files with these types in a diffent paths, you  need  to  execute
145       the  semanage  command  to  specify alternate labeling and then use re‐
146       storecon to put the labels on disk.
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148       semanage fcontext -a -t tuned_var_run_t '/srv/mytuned_content(/.*)?'
149       restorecon -R -v /srv/mytuned_content
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151       Note: SELinux often uses regular expressions  to  specify  labels  that
152       match multiple files.
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154       The following file types are defined for tuned:
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158       tuned_etc_t
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160       - Set files with the tuned_etc_t type, if you want to store tuned files
161       in the /etc directories.
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165       tuned_exec_t
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167       - Set files with the tuned_exec_t type, if you want  to  transition  an
168       executable to the tuned_t domain.
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172       tuned_initrc_exec_t
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174       -  Set  files with the tuned_initrc_exec_t type, if you want to transi‐
175       tion an executable to the tuned_initrc_t domain.
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179       tuned_log_t
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181       - Set files with the tuned_log_t type, if you want to treat the data as
182       tuned log data, usually stored under the /var/log directory.
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185       Paths:
186            /var/log/tuned(/.*)?, /var/log/tuned.log.*
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189       tuned_rw_etc_t
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191       - Set files with the tuned_rw_etc_t type, if you want to store tuned rw
192       files in the /etc directories.
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195       Paths:
196            /etc/tuned/bootcmdline,  /etc/tuned/profile_mode,   /etc/tuned/ac‐
197            tive_profile, /etc/tuned/post_loaded_profile
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200       tuned_tmp_t
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202       -  Set files with the tuned_tmp_t type, if you want to store tuned tem‐
203       porary files in the /tmp directories.
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207       tuned_var_run_t
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209       - Set files with the tuned_var_run_t type, if you  want  to  store  the
210       tuned files under the /run or /var/run directory.
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213       Paths:
214            /var/run/tuned(/.*)?, /var/run/tuned.pid
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217       Note:  File context can be temporarily modified with the chcon command.
218       If you want to permanently change the file context you need to use  the
219       semanage fcontext command.  This will modify the SELinux labeling data‐
220       base.  You will need to use restorecon to apply the labels.
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COMMANDS

224       semanage fcontext can also be used to manipulate default  file  context
225       mappings.
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227       semanage  permissive  can  also  be used to manipulate whether or not a
228       process type is permissive.
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230       semanage module can also be used to enable/disable/install/remove  pol‐
231       icy modules.
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233       semanage boolean can also be used to manipulate the booleans
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236       system-config-selinux is a GUI tool available to customize SELinux pol‐
237       icy settings.
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AUTHOR

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