1virtd_selinux(8) SELinux Policy virtd virtd_selinux(8)
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6 virtd_selinux - Security Enhanced Linux Policy for the virtd processes
7
9 Security-Enhanced Linux secures the virtd processes via flexible manda‐
10 tory access control.
11 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.
15 For example:
17 ps -eZ | grep virtd_t
19
23 The virtd_t SELinux type can be entered via the virtd_exec_t file type.
24 The default entrypoint paths for the virtd_t domain are the following:
26 /usr/lib/virt-sysprep/firstboot.sh, /usr/bin/virt-who, /usr/bin/img‐
28 fac.py, /usr/sbin/libvirtd, /usr/share/vdsm/vdsm, /usr/bin/imagefac‐
29 tory, /usr/bin/nova-compute, /usr/bin/qemu-pr-helper,
30 /usr/share/vdsm/respawn, /usr/bin/vios-proxy-host, /usr/sbin/condor_vm-
31 gahp, /usr/bin/vios-proxy-guest, /usr/share/vdsm/daemonAdapter,
32 /usr/share/vdsm/supervdsmServer
33
35 SELinux defines process types (domains) for each process running on the
36 system
37 You can see the context of a process using the -Z option to ps
39 Policy governs the access confined processes have to files. SELinux
41 virtd policy is very flexible allowing users to setup their virtd pro‐
42 cesses in as secure a method as possible.
43 The following process types are defined for virtd:
45 virtd_t, virt_qmf_t, virt_bridgehelper_t, virt_qemu_ga_t, virtd_lxc_t, virt_qemu_ga_unconfined_t
47 Note: semanage permissive -a virtd_t can be used to make the process
49 type virtd_t permissive. SELinux does not deny access to permissive
50 process types, but the AVC (SELinux denials) messages are still gener‐
51 ated.
52
55 SELinux policy is customizable based on least access required. virtd
56 policy is extremely flexible and has several booleans that allow you to
57 manipulate the policy and run virtd with the tightest access possible.
58 If you want to allow virtual processes to run as userdomains, you must
62 turn on the virt_transition_userdomain boolean. Disabled by default.
63 setsebool -P virt_transition_userdomain 1
65 If you want to allow confined virtual guests to manage nfs files, you
69 must turn on the virt_use_nfs boolean. Disabled by default.
70 setsebool -P virt_use_nfs 1
72 If you want to allow confined virtual guests to manage cifs files, you
76 must turn on the virt_use_samba boolean. Disabled by default.
77 setsebool -P virt_use_samba 1
79 If you want to allow users to resolve user passwd entries directly from
83 ldap rather then using a sssd server, you must turn on the authlo‐
84 gin_nsswitch_use_ldap boolean. Disabled by default.
85 setsebool -P authlogin_nsswitch_use_ldap 1
87 If you want to deny user domains applications to map a memory region as
91 both executable and writable, this is dangerous and the executable
92 should be reported in bugzilla, you must turn on the deny_execmem bool‐
93 ean. Enabled by default.
94 setsebool -P deny_execmem 1
96 If you want to allow all domains to execute in fips_mode, you must turn
100 on the fips_mode boolean. Enabled by default.
101 setsebool -P fips_mode 1
103 If you want to allow confined applications to run with kerberos, you
107 must turn on the kerberos_enabled boolean. Disabled by default.
108 setsebool -P kerberos_enabled 1
110 If you want to control the ability to mmap a low area of the address
114 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
115 the mmap_low_allowed boolean. Disabled by default.
116 setsebool -P mmap_low_allowed 1
118 If you want to allow system to run with NIS, you must turn on the
122 nis_enabled boolean. Disabled by default.
123 setsebool -P nis_enabled 1
125 If you want to allow confined applications to use nscd shared memory,
129 you must turn on the nscd_use_shm boolean. Disabled by default.
130 setsebool -P nscd_use_shm 1
132 If you want to disable kernel module loading, you must turn on the
136 secure_mode_insmod boolean. Enabled by default.
137 setsebool -P secure_mode_insmod 1
139 If you want to allow unconfined executables to make their heap memory
143 executable. Doing this is a really bad idea. Probably indicates a
144 badly coded executable, but could indicate an attack. This executable
145 should be reported in bugzilla, you must turn on the selin‐
146 uxuser_execheap boolean. Disabled by default.
147 setsebool -P selinuxuser_execheap 1
149 If you want to allow unconfined executables to make their stack exe‐
153 cutable. This should never, ever be necessary. Probably indicates a
154 badly coded executable, but could indicate an attack. This executable
155 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
156 stack boolean. Disabled by default.
157 setsebool -P selinuxuser_execstack 1
159
163 SELinux defines port types to represent TCP and UDP ports.
164 You can see the types associated with a port by using the following
166 command:
167 semanage port -l
169 Policy governs the access confined processes have to these ports.
172 SELinux virtd policy is very flexible allowing users to setup their
173 virtd processes in as secure a method as possible.
174 The following port types are defined for virtd:
176 virt_migration_port_t
179 Default Defined Ports:
183 tcp 49152-49216
184 virt_port_t
187 Default Defined Ports:
191 tcp 16509,16514
192 udp 16509,16514
193
195 The SELinux process type virtd_t can manage files labeled with the fol‐
196 lowing file types. The paths listed are the default paths for these
197 file types. Note the processes UID still need to have DAC permissions.
198 file_type
200 all files on the system
202
205 SELinux requires files to have an extended attribute to define the file
206 type.
207 You can see the context of a file using the -Z option to ls
209 Policy governs the access confined processes have to these files.
211 SELinux virtd policy is very flexible allowing users to setup their
212 virtd processes in as secure a method as possible.
213 STANDARD FILE CONTEXT
215 SELinux defines the file context types for the virtd, if you wanted to
217 store files with these types in a diffent paths, you need to execute
218 the semanage command to sepecify alternate labeling and then use
219 restorecon to put the labels on disk.
220 semanage fcontext -a -t virtd_keytab_t '/srv/myvirtd_content(/.*)?'
222 restorecon -R -v /srv/myvirtd_content
223 Note: SELinux often uses regular expressions to specify labels that
225 match multiple files.
226 The following file types are defined for virtd:
228 virtd_exec_t
232 - Set files with the virtd_exec_t type, if you want to transition an
234 executable to the virtd_t domain.
235 Paths:
238 /usr/lib/virt-sysprep/firstboot.sh, /usr/bin/virt-who,
239 /usr/bin/imgfac.py, /usr/sbin/libvirtd, /usr/share/vdsm/vdsm,
240 /usr/bin/imagefactory, /usr/bin/nova-compute, /usr/bin/qemu-pr-
241 helper, /usr/share/vdsm/respawn, /usr/bin/vios-proxy-host,
242 /usr/sbin/condor_vm-gahp, /usr/bin/vios-proxy-guest,
243 /usr/share/vdsm/daemonAdapter, /usr/share/vdsm/supervdsmServer
244 virtd_initrc_exec_t
247 - Set files with the virtd_initrc_exec_t type, if you want to transi‐
249 tion an executable to the virtd_initrc_t domain.
250 virtd_keytab_t
254 - Set files with the virtd_keytab_t type, if you want to treat the
256 files as kerberos keytab files.
257 virtd_lxc_exec_t
261 - Set files with the virtd_lxc_exec_t type, if you want to transition
263 an executable to the virtd_lxc_t domain.
264 virtd_unit_file_t
268 - Set files with the virtd_unit_file_t type, if you want to treat the
270 files as virtd unit content.
271 Paths:
274 /usr/lib/systemd/system/.*xen.*.service, /usr/lib/systemd/sys‐
275 tem/virt.*.service, /usr/lib/systemd/system/libvirt.*.service
276 Note: File context can be temporarily modified with the chcon command.
279 If you want to permanently change the file context you need to use the
280 semanage fcontext command. This will modify the SELinux labeling data‐
281 base. You will need to use restorecon to apply the labels.
282
285 semanage fcontext can also be used to manipulate default file context
286 mappings.
287 semanage permissive can also be used to manipulate whether or not a
289 process type is permissive.
290 semanage module can also be used to enable/disable/install/remove pol‐
292 icy modules.
293 semanage port can also be used to manipulate the port definitions
295 semanage boolean can also be used to manipulate the booleans
297 system-config-selinux is a GUI tool available to customize SELinux pol‐
300 icy settings.
301
304 This manual page was auto-generated using sepolicy manpage .
305
308 selinux(8), virtd(8), semanage(8), restorecon(8), chcon(1), sepol‐
309 icy(8), setsebool(8), virt_bridgehelper_selinux(8),
310 virt_qemu_ga_selinux(8), virt_qemu_ga_unconfined_selinux(8),
311 virt_qmf_selinux(8), virtd_lxc_selinux(8)
312virtd 19-12-02 virtd_selinux(8)