1virtd_selinux(8)             SELinux Policy virtd             virtd_selinux(8)
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NAME

6       virtd_selinux - Security Enhanced Linux Policy for the virtd processes
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DESCRIPTION

9       Security-Enhanced Linux secures the virtd processes via flexible manda‐
10       tory access control.
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12       The virtd processes execute with the  virtd_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 virtd_t
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ENTRYPOINTS

23       The virtd_t SELinux type can be entered via the virtd_exec_t file type.
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25       The default entrypoint paths for the virtd_t domain are the following:
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27       /usr/lib/virt-sysprep/firstboot.sh,                  /usr/bin/virt-who,
28       /usr/sbin/virtvzd,        /usr/bin/imgfac.py,       /usr/sbin/libvirtd,
29       /usr/sbin/virtlxcd,      /usr/sbin/virtxend,       /usr/sbin/virtqemud,
30       /usr/sbin/virtvboxd,    /usr/share/vdsm/vdsm,    /usr/bin/imagefactory,
31       /usr/bin/nova-compute,  /usr/sbin/virtsecretd,  /usr/sbin/virtnetworkd,
32       /usr/sbin/virtnodedevd,    /usr/sbin/virtstoraged,    /usr/bin/qemu-pr-
33       helper,        /usr/sbin/virtnwfilterd,        /usr/share/vdsm/respawn,
34       /usr/bin/vios-proxy-host,  /usr/sbin/condor_vm-gahp,  /usr/sbin/virtin‐
35       terfaced,    /usr/bin/vios-proxy-guest,    /usr/libexec/qemu-pr-helper,
36       /usr/share/vdsm/daemonAdapter, /usr/share/vdsm/supervdsmServer
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PROCESS TYPES

39       SELinux defines process types (domains) for each process running on the
40       system
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42       You can see the context of a process using the -Z option to ps
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44       Policy governs the access confined processes have  to  files.   SELinux
45       virtd  policy is very flexible allowing users to setup their virtd pro‐
46       cesses in as secure a method as possible.
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48       The following process types are defined for virtd:
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50       virtd_t, virt_bridgehelper_t, virt_qemu_ga_t, virtd_lxc_t, virt_qemu_ga_unconfined_t
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52       Note: semanage permissive -a virtd_t can be used to  make  the  process
53       type  virtd_t  permissive.  SELinux  does not deny access to permissive
54       process types, but the AVC (SELinux denials) messages are still  gener‐
55       ated.
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57

BOOLEANS

59       SELinux  policy  is customizable based on least access required.  virtd
60       policy is extremely flexible and has several booleans that allow you to
61       manipulate the policy and run virtd with the tightest access possible.
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65       If  you want to allow virtual processes to run as userdomains, you must
66       turn on the virt_transition_userdomain boolean. Disabled by default.
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68       setsebool -P virt_transition_userdomain 1
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72       If you want to control the ability to mmap a low area  of  the  address
73       space,  as  configured  by /proc/sys/vm/mmap_min_addr, you must turn on
74       the mmap_low_allowed boolean. Disabled by default.
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76       setsebool -P mmap_low_allowed 1
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80       If you want to disable kernel module loading,  you  must  turn  on  the
81       secure_mode_insmod boolean. Enabled by default.
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83       setsebool -P secure_mode_insmod 1
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86
87       If  you  want to allow unconfined executables to make their heap memory
88       executable.  Doing this is a really  bad  idea.  Probably  indicates  a
89       badly  coded  executable, but could indicate an attack. This executable
90       should  be  reported  in  bugzilla,  you  must  turn  on   the   selin‐
91       uxuser_execheap boolean. Disabled by default.
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93       setsebool -P selinuxuser_execheap 1
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97       If  you  want  to allow unconfined executables to make their stack exe‐
98       cutable.  This should never, ever be necessary.  Probably  indicates  a
99       badly  coded  executable, but could indicate an attack. This executable
100       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
101       stack boolean. Disabled by default.
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103       setsebool -P selinuxuser_execstack 1
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PORT TYPES

108       SELinux defines port types to represent TCP and UDP ports.
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110       You  can  see  the  types associated with a port by using the following
111       command:
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113       semanage port -l
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116       Policy governs the access  confined  processes  have  to  these  ports.
117       SELinux  virtd  policy  is  very flexible allowing users to setup their
118       virtd processes in as secure a method as possible.
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120       The following port types are defined for virtd:
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122
123       virt_migration_port_t
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127       Default Defined Ports:
128                 tcp 49152-49216
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130
131       virt_port_t
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135       Default Defined Ports:
136                 tcp 16509,16514
137                 udp 16509,16514
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MANAGED FILES

140       The SELinux process type virtd_t can manage files labeled with the fol‐
141       lowing  file  types.   The paths listed are the default paths for these
142       file types.  Note the processes UID still need to have DAC permissions.
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144       file_type
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146            all files on the system
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148

FILE CONTEXTS

150       SELinux requires files to have an extended attribute to define the file
151       type.
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153       You can see the context of a file using the -Z option to ls
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155       Policy  governs  the  access  confined  processes  have to these files.
156       SELinux virtd policy is very flexible allowing  users  to  setup  their
157       virtd processes in as secure a method as possible.
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159       STANDARD FILE CONTEXT
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161       SELinux  defines the file context types for the virtd, if you wanted to
162       store files with these types in a diffent paths, you  need  to  execute
163       the  semanage  command  to  sepecify  alternate  labeling  and then use
164       restorecon to put the labels on disk.
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166       semanage fcontext -a -t virtd_keytab_t '/srv/myvirtd_content(/.*)?'
167       restorecon -R -v /srv/myvirtd_content
168
169       Note: SELinux often uses regular expressions  to  specify  labels  that
170       match multiple files.
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172       The following file types are defined for virtd:
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176       virtd_exec_t
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178       -  Set  files  with the virtd_exec_t type, if you want to transition an
179       executable to the virtd_t domain.
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181
182       Paths:
183            /usr/lib/virt-sysprep/firstboot.sh,             /usr/bin/virt-who,
184            /usr/sbin/virtvzd,     /usr/bin/imgfac.py,     /usr/sbin/libvirtd,
185            /usr/sbin/virtlxcd,    /usr/sbin/virtxend,    /usr/sbin/virtqemud,
186            /usr/sbin/virtvboxd,  /usr/share/vdsm/vdsm, /usr/bin/imagefactory,
187            /usr/bin/nova-compute,  /usr/sbin/virtsecretd,  /usr/sbin/virtnet‐
188            workd,       /usr/sbin/virtnodedevd,       /usr/sbin/virtstoraged,
189            /usr/bin/qemu-pr-helper,                  /usr/sbin/virtnwfilterd,
190            /usr/share/vdsm/respawn,  /usr/bin/vios-proxy-host, /usr/sbin/con‐
191            dor_vm-gahp, /usr/sbin/virtinterfaced,  /usr/bin/vios-proxy-guest,
192            /usr/libexec/qemu-pr-helper,        /usr/share/vdsm/daemonAdapter,
193            /usr/share/vdsm/supervdsmServer
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196       virtd_initrc_exec_t
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198       - Set files with the virtd_initrc_exec_t type, if you want  to  transi‐
199       tion an executable to the virtd_initrc_t domain.
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203       virtd_keytab_t
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205       -  Set  files  with  the  virtd_keytab_t type, if you want to treat the
206       files as kerberos keytab files.
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210       virtd_lxc_exec_t
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212       - Set files with the virtd_lxc_exec_t type, if you want  to  transition
213       an executable to the virtd_lxc_t domain.
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217       virtd_unit_file_t
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219       -  Set  files with the virtd_unit_file_t type, if you want to treat the
220       files as virtd unit content.
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223       Paths:
224            /usr/lib/systemd/system/.*xen.*.service,     /usr/lib/systemd/sys‐
225            tem/virt.*.service, /usr/lib/systemd/system/libvirt.*.service
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227
228       Note:  File context can be temporarily modified with the chcon command.
229       If you want to permanently change the file context you need to use  the
230       semanage fcontext command.  This will modify the SELinux labeling data‐
231       base.  You will need to use restorecon to apply the labels.
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COMMANDS

235       semanage fcontext can also be used to manipulate default  file  context
236       mappings.
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238       semanage  permissive  can  also  be used to manipulate whether or not a
239       process type is permissive.
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241       semanage module can also be used to enable/disable/install/remove  pol‐
242       icy modules.
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244       semanage port can also be used to manipulate the port definitions
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246       semanage boolean can also be used to manipulate the booleans
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248
249       system-config-selinux is a GUI tool available to customize SELinux pol‐
250       icy settings.
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252

AUTHOR

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

258       selinux(8),  virtd(8),  semanage(8),  restorecon(8),  chcon(1),  sepol‐
259       icy(8),           setsebool(8),           virt_bridgehelper_selinux(8),
260       virt_qemu_ga_selinux(8),            virt_qemu_ga_unconfined_selinux(8),
261       virtd_lxc_selinux(8)
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265virtd                              21-03-26                   virtd_selinux(8)
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