1virtd_selinux(8) SELinux Policy virtd virtd_selinux(8)
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6 virtd_selinux - Security Enhanced Linux Policy for the virtd processes
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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,
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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39 SELinux defines process types (domains) for each process running on the
40 system
41 You can see the context of a process using the -Z option to ps
43 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.
47 The following process types are defined for virtd:
49 virtd_t, virt_bridgehelper_t, virt_qemu_ga_t, virtd_lxc_t, virt_qemu_ga_unconfined_t
51 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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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.
62 If you want to allow virtual processes to run as userdomains, you must
66 turn on the virt_transition_userdomain boolean. Disabled by default.
67 setsebool -P virt_transition_userdomain 1
69 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.
75 setsebool -P mmap_low_allowed 1
77 If you want to disable kernel module loading, you must turn on the se‐
81 cure_mode_insmod boolean. Enabled by default.
82 setsebool -P secure_mode_insmod 1
84 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 selinuxuser_ex‐
91 echeap boolean. Disabled by default.
92 setsebool -P selinuxuser_execheap 1
94 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. Enabled by default.
102 setsebool -P selinuxuser_execstack 1
104
108 SELinux defines port types to represent TCP and UDP ports.
109 You can see the types associated with a port by using the following
111 command:
112 semanage port -l
114 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.
119 The following port types are defined for virtd:
121 virt_migration_port_t
124 Default Defined Ports:
128 tcp 49152-49216
129 virt_port_t
132 Default Defined Ports:
136 tcp 16509,16514
137 udp 16509,16514
138
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.
143 file_type
145 all files on the system
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150 SELinux requires files to have an extended attribute to define the file
151 type.
152 You can see the context of a file using the -Z option to ls
154 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.
158 STANDARD FILE CONTEXT
160 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 re‐
164 storecon to put the labels on disk.
165 semanage fcontext -a -t virtd_keytab_t '/srv/myvirtd_content(/.*)?'
167 restorecon -R -v /srv/myvirtd_content
168 Note: SELinux often uses regular expressions to specify labels that
170 match multiple files.
171 The following file types are defined for virtd:
173 virtd_exec_t
177 - Set files with the virtd_exec_t type, if you want to transition an
179 executable to the virtd_t domain.
180 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
194 virtd_initrc_exec_t
197 - Set files with the virtd_initrc_exec_t type, if you want to transi‐
199 tion an executable to the virtd_initrc_t domain.
200 virtd_keytab_t
204 - Set files with the virtd_keytab_t type, if you want to treat the
206 files as kerberos keytab files.
207 virtd_lxc_exec_t
211 - Set files with the virtd_lxc_exec_t type, if you want to transition
213 an executable to the virtd_lxc_t domain.
214 virtd_unit_file_t
218 - Set files with the virtd_unit_file_t type, if you want to treat the
220 files as virtd unit content.
221 Paths:
224 /usr/lib/systemd/system/.*xen.*.service, /usr/lib/systemd/sys‐
225 tem/virt.*.service, /usr/lib/systemd/system/libvirt.*.service
226 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.
232
235 semanage fcontext can also be used to manipulate default file context
236 mappings.
237 semanage permissive can also be used to manipulate whether or not a
239 process type is permissive.
240 semanage module can also be used to enable/disable/install/remove pol‐
242 icy modules.
243 semanage port can also be used to manipulate the port definitions
245 semanage boolean can also be used to manipulate the booleans
247 system-config-selinux is a GUI tool available to customize SELinux pol‐
250 icy settings.
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254 This manual page was auto-generated using sepolicy manpage .
255
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)
262virtd 21-06-09 virtd_selinux(8)