1clvmd_selinux(8)             SELinux Policy clvmd             clvmd_selinux(8)
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NAME

6       clvmd_selinux - Security Enhanced Linux Policy for the clvmd processes
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DESCRIPTION

9       Security-Enhanced Linux secures the clvmd processes via flexible manda‐
10       tory access control.
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12       The clvmd processes execute with the  clvmd_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 clvmd_t
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ENTRYPOINTS

23       The clvmd_t SELinux type can be entered via the clvmd_exec_t file type.
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25       The default entrypoint paths for the clvmd_t domain are the following:
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27       /usr/sbin/clvmd
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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       clvmd policy is very flexible allowing users to setup their clvmd  pro‐
37       cesses in as secure a method as possible.
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39       The following process types are defined for clvmd:
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41       clvmd_t
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43       Note:  semanage  permissive  -a clvmd_t can be used to make the process
44       type clvmd_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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48

BOOLEANS

50       SELinux policy is customizable based on least access  required.   clvmd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run clvmd 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
74       secure_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  selin‐
84       uxuser_execheap 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. Disabled by default.
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96       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

101       The SELinux process type clvmd_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 clvmd policy is very flexible allowing  users  to  setup  their
118       clvmd processes in as secure a method as possible.
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120       STANDARD FILE CONTEXT
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122       SELinux  defines the file context types for the clvmd, if you wanted to
123       store files with these types in a diffent paths, you  need  to  execute
124       the  semanage  command  to  sepecify  alternate  labeling  and then use
125       restorecon to put the labels on disk.
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127       semanage fcontext -a -t clvmd_var_run_t '/srv/myclvmd_content(/.*)?'
128       restorecon -R -v /srv/myclvmd_content
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130       Note: SELinux often uses regular expressions  to  specify  labels  that
131       match multiple files.
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133       The following file types are defined for clvmd:
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137       clvmd_exec_t
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139       -  Set  files  with the clvmd_exec_t type, if you want to transition an
140       executable to the clvmd_t domain.
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144       clvmd_initrc_exec_t
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146       - Set files with the clvmd_initrc_exec_t type, if you want  to  transi‐
147       tion an executable to the clvmd_initrc_t domain.
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151       clvmd_tmpfs_t
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153       -  Set  files  with  the clvmd_tmpfs_t type, if you want to store clvmd
154       files on a tmpfs file system.
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158       clvmd_var_run_t
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160       - Set files with the clvmd_var_run_t type, if you  want  to  store  the
161       clvmd files under the /run or /var/run directory.
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165       Note:  File context can be temporarily modified with the chcon command.
166       If you want to permanently change the file context you need to use  the
167       semanage fcontext command.  This will modify the SELinux labeling data‐
168       base.  You will need to use restorecon to apply the labels.
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COMMANDS

172       semanage fcontext can also be used to manipulate default  file  context
173       mappings.
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175       semanage  permissive  can  also  be used to manipulate whether or not a
176       process type is permissive.
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178       semanage module can also be used to enable/disable/install/remove  pol‐
179       icy modules.
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181       semanage boolean can also be used to manipulate the booleans
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183
184       system-config-selinux is a GUI tool available to customize SELinux pol‐
185       icy settings.
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AUTHOR

189       This manual page was auto-generated using sepolicy manpage .
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SEE ALSO

193       selinux(8),  clvmd(8),  semanage(8),  restorecon(8),  chcon(1),  sepol‐
194       icy(8), setsebool(8)
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198clvmd                              20-05-05                   clvmd_selinux(8)
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