uml_selinux(8)

1uml_selinux(8)                SELinux Policy uml                uml_selinux(8)
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NAME

6       uml_selinux - Security Enhanced Linux Policy for the uml processes
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DESCRIPTION

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

23       The uml_t SELinux type can be entered via the uml_exec_t file type.
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25       The default entrypoint paths for the uml_t domain are the following:
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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       uml policy is very flexible allowing users to setup their uml processes
37       in as secure a method as possible.
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39       The following process types are defined for uml:
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41       uml_t, uml_switch_t
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43       Note: semanage permissive -a uml_t can be used to make the process type
44       uml_t permissive. SELinux does not deny access  to  permissive  process
45       types, but the AVC (SELinux denials) messages are still generated.
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BOOLEANS

49       SELinux  policy  is  customizable  based on least access required.  uml
50       policy is extremely flexible and has several booleans that allow you to
51       manipulate the policy and run uml with the tightest access possible.
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55       If you want to allow users to resolve user passwd entries directly from
56       ldap rather then using a sssd server, you  must  turn  on  the  authlo‐
57       gin_nsswitch_use_ldap boolean. Disabled by default.
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59       setsebool -P authlogin_nsswitch_use_ldap 1
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63       If  you  want  to deny any process from ptracing or debugging any other
64       processes, you  must  turn  on  the  deny_ptrace  boolean.  Enabled  by
65       default.
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67       setsebool -P deny_ptrace 1
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71       If  you  want  to  allow  any  process  to mmap any file on system with
72       attribute file_type, you must turn on the  domain_can_mmap_files  bool‐
73       ean. Enabled by default.
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75       setsebool -P domain_can_mmap_files 1
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79       If  you want to allow all domains write to kmsg_device, while kernel is
80       executed with systemd.log_target=kmsg parameter, you must turn  on  the
81       domain_can_write_kmsg boolean. Disabled by default.
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83       setsebool -P domain_can_write_kmsg 1
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87       If you want to allow all domains to use other domains file descriptors,
88       you must turn on the domain_fd_use boolean. Enabled by default.
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90       setsebool -P domain_fd_use 1
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94       If you want to allow all domains to have the kernel load  modules,  you
95       must  turn  on  the  domain_kernel_load_modules  boolean.  Disabled  by
96       default.
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98       setsebool -P domain_kernel_load_modules 1
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102       If you want to allow all domains to execute in fips_mode, you must turn
103       on the fips_mode boolean. Enabled by default.
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105       setsebool -P fips_mode 1
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109       If you want to enable reading of urandom for all domains, you must turn
110       on the global_ssp boolean. Disabled by default.
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112       setsebool -P global_ssp 1
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116       If you want to allow confined applications to run  with  kerberos,  you
117       must turn on the kerberos_enabled boolean. Enabled by default.
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119       setsebool -P kerberos_enabled 1
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123       If  you  want  to  allow  system  to run with NIS, you must turn on the
124       nis_enabled boolean. Disabled by default.
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126       setsebool -P nis_enabled 1
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130       If you want to allow confined applications to use nscd  shared  memory,
131       you must turn on the nscd_use_shm boolean. Disabled by default.
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133       setsebool -P nscd_use_shm 1
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137       If  you  want  to  support  NFS  home directories, you must turn on the
138       use_nfs_home_dirs boolean. Disabled by default.
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140       setsebool -P use_nfs_home_dirs 1
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144       If you want to support SAMBA home directories, you  must  turn  on  the
145       use_samba_home_dirs boolean. Disabled by default.
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147       setsebool -P use_samba_home_dirs 1
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MANAGED FILES

152       The  SELinux  process type uml_t can manage files labeled with the fol‐
153       lowing file types.  The paths listed are the default  paths  for  these
154       file types.  Note the processes UID still need to have DAC permissions.
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156       cifs_t
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159       nfs_t
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162       uml_rw_t
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164            /home/[^/]+/.uml(/.*)?
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166       uml_tmp_t
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169       uml_tmpfs_t
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FILE CONTEXTS

174       SELinux requires files to have an extended attribute to define the file
175       type.
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177       You can see the context of a file using the -Z option to ls
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179       Policy governs the access  confined  processes  have  to  these  files.
180       SELinux  uml  policy is very flexible allowing users to setup their uml
181       processes in as secure a method as possible.
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183       STANDARD FILE CONTEXT
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185       SELinux defines the file context types for the uml, if  you  wanted  to
186       store  files  with  these types in a diffent paths, you need to execute
187       the semanage command  to  sepecify  alternate  labeling  and  then  use
188       restorecon to put the labels on disk.
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190       semanage fcontext -a -t uml_tmpfs_t '/srv/myuml_content(/.*)?'
191       restorecon -R -v /srv/myuml_content
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193       Note:  SELinux  often  uses  regular expressions to specify labels that
194       match multiple files.
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196       The following file types are defined for uml:
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200       uml_exec_t
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202       - Set files with the uml_exec_t type, if you want to transition an exe‐
203       cutable to the uml_t domain.
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207       uml_ro_t
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209       -  Set  files with the uml_ro_t type, if you want to treat the files as
210       uml read/only content.
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214       uml_rw_t
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216       - Set files with the uml_rw_t type, if you want to treat the  files  as
217       uml read/write content.
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221       uml_switch_exec_t
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223       -  Set files with the uml_switch_exec_t type, if you want to transition
224       an executable to the uml_switch_t domain.
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228       uml_switch_var_run_t
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230       - Set files with the uml_switch_var_run_t type, if you  want  to  store
231       the uml switch files under the /run or /var/run directory.
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235       uml_tmp_t
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237       - Set files with the uml_tmp_t type, if you want to store uml temporary
238       files in the /tmp directories.
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242       uml_tmpfs_t
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244       - Set files with the uml_tmpfs_t type, if you want to store  uml  files
245       on a tmpfs file system.
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249       Note:  File context can be temporarily modified with the chcon command.
250       If you want to permanently change the file context you need to use  the
251       semanage fcontext command.  This will modify the SELinux labeling data‐
252       base.  You will need to use restorecon to apply the labels.
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COMMANDS

256       semanage fcontext can also be used to manipulate default  file  context
257       mappings.
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259       semanage  permissive  can  also  be used to manipulate whether or not a
260       process type is permissive.
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262       semanage module can also be used to enable/disable/install/remove  pol‐
263       icy modules.
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265       semanage boolean can also be used to manipulate the booleans
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268       system-config-selinux is a GUI tool available to customize SELinux pol‐
269       icy settings.
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AUTHOR

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