1svirt_selinux(8) SELinux Policy svirt svirt_selinux(8)
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6 svirt_selinux - Security Enhanced Linux Policy for the svirt processes
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9 Security-Enhanced Linux secures the svirt processes via flexible manda‐
10 tory access control.
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12 The svirt processes execute with the svirt_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 svirt_t
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23 The svirt_t SELinux type can be entered via the qemu_exec_t file type.
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25 The default entrypoint paths for the svirt_t domain are the following:
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27 /usr/libexec/qemu.*, /usr/bin/qemu-system-.*, /usr/bin/qemu,
28 /usr/bin/qemu-kvm
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31 SELinux defines process types (domains) for each process running on the
32 system
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34 You can see the context of a process using the -Z option to ps
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36 Policy governs the access confined processes have to files. SELinux
37 svirt policy is very flexible allowing users to setup their svirt pro‐
38 cesses in as secure a method as possible.
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40 The following process types are defined for svirt:
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42 svirt_t, svirt_tcg_t, svirt_qemu_net_t, svirt_socket_t, svirt_kvm_net_t
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44 Note: semanage permissive -a svirt_t can be used to make the process
45 type svirt_t permissive. SELinux does not deny access to permissive
46 process types, but the AVC (SELinux denials) messages are still gener‐
47 ated.
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51 The SELinux process type svirt_t is an MCS (Multi Category Security)
52 constrained type. Sometimes this separation is referred to as sVirt.
53 These types are usually used for securing multi-tenant environments,
54 such as virtualization, containers or separation of users. The tools
55 used to launch MCS types, pick out a different MCS label for each
56 process group.
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58 For example one process might be launched with svirt_t:s0:c1,c2, and
59 another process launched with svirt_t:s0:c3,c4. The SELinux kernel only
60 allows these processes can only write to content with a matching MCS
61 label, or a MCS Label of s0. A process running with the MCS level of
62 s0:c1,c2 is not allowed to write to content with the MCS label of
63 s0:c3,c4
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67 SELinux policy is customizable based on least access required. svirt
68 policy is extremely flexible and has several booleans that allow you to
69 manipulate the policy and run svirt with the tightest access possible.
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73 If you want to allow all domains to execute in fips_mode, you must turn
74 on the fips_mode boolean. Enabled by default.
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76 setsebool -P fips_mode 1
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80 If you want to allow confined virtual guests to use executable memory
81 and executable stack, you must turn on the virt_use_execmem boolean.
82 Disabled by default.
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84 setsebool -P virt_use_execmem 1
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88 If you want to allow confined virtual guests to interact with rawip
89 sockets, you must turn on the virt_use_rawip boolean. Disabled by
90 default.
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92 setsebool -P virt_use_rawip 1
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97 The SELinux process type svirt_t can manage files labeled with the fol‐
98 lowing file types. The paths listed are the default paths for these
99 file types. Note the processes UID still need to have DAC permissions.
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101 anon_inodefs_t
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104 cephfs_t
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107 cifs_t
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110 dosfs_t
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113 fusefs_t
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115 /var/run/user/[^/]*/gvfs
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117 glusterd_var_run_t
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119 /var/run/gluster(/.*)?
120 /var/run/glusterd.*
121 /var/run/glusterd.*
122 /var/run/glusterd(/.*)?
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124 nfs_t
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127 qemu_var_run_t
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129 /var/lib/libvirt/qemu(/.*)?
130 /var/run/libvirt/qemu(/.*)?
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132 svirt_home_t
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134 /home/[^/]+/.libvirt/qemu(/.*)?
135 /home/[^/]+/.cache/libvirt/qemu(/.*)?
136 /home/[^/]+/.config/libvirt/qemu(/.*)?
137 /home/[^/]+/.local/share/libvirt/boot(/.*)?
138 /home/[^/]+/.local/share/libvirt/images(/.*)?
139 /home/[^/]+/.local/share/gnome-boxes/images(/.*)?
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141 svirt_image_t
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144 svirt_tmp_t
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147 svirt_tmpfs_t
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150 usbfs_t
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153 virt_cache_t
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155 /var/cache/oz(/.*)?
156 /var/cache/libvirt(/.*)?
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160 SELinux requires files to have an extended attribute to define the file
161 type.
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163 You can see the context of a file using the -Z option to ls
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165 Policy governs the access confined processes have to these files.
166 SELinux svirt policy is very flexible allowing users to setup their
167 svirt processes in as secure a method as possible.
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169 STANDARD FILE CONTEXT
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171 SELinux defines the file context types for the svirt, if you wanted to
172 store files with these types in a diffent paths, you need to execute
173 the semanage command to sepecify alternate labeling and then use
174 restorecon to put the labels on disk.
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176 semanage fcontext -a -t svirt_home_t '/srv/mysvirt_content(/.*)?'
177 restorecon -R -v /srv/mysvirt_content
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179 Note: SELinux often uses regular expressions to specify labels that
180 match multiple files.
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182 The following file types are defined for svirt:
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186 svirt_home_t
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188 - Set files with the svirt_home_t type, if you want to store svirt
189 files in the users home directory.
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192 Paths:
193 /home/[^/]+/.libvirt/qemu(/.*)?, /home/[^/]+/.cache/lib‐
194 virt/qemu(/.*)?, /home/[^/]+/.config/libvirt/qemu(/.*)?,
195 /home/[^/]+/.local/share/libvirt/boot(/.*)?,
196 /home/[^/]+/.local/share/libvirt/images(/.*)?,
197 /home/[^/]+/.local/share/gnome-boxes/images(/.*)?
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200 svirt_image_t
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202 - Set files with the svirt_image_t type, if you want to treat the files
203 as svirt image data.
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207 svirt_tmp_t
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209 - Set files with the svirt_tmp_t type, if you want to store svirt tem‐
210 porary files in the /tmp directories.
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214 svirt_tmpfs_t
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216 - Set files with the svirt_tmpfs_t type, if you want to store svirt
217 files on a tmpfs file system.
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221 Note: File context can be temporarily modified with the chcon command.
222 If you want to permanently change the file context you need to use the
223 semanage fcontext command. This will modify the SELinux labeling data‐
224 base. You will need to use restorecon to apply the labels.
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228 semanage fcontext can also be used to manipulate default file context
229 mappings.
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231 semanage permissive can also be used to manipulate whether or not a
232 process type is permissive.
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234 semanage module can also be used to enable/disable/install/remove pol‐
235 icy modules.
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237 semanage boolean can also be used to manipulate the booleans
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240 system-config-selinux is a GUI tool available to customize SELinux pol‐
241 icy settings.
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245 This manual page was auto-generated using sepolicy manpage .
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249 selinux(8), svirt(8), semanage(8), restorecon(8), chcon(1), sepol‐
250 icy(8), setsebool(8), svirt_kvm_net_selinux(8),
251 svirt_kvm_net_selinux(8), svirt_qemu_net_selinux(8),
252 svirt_qemu_net_selinux(8), svirt_socket_selinux(8),
253 svirt_socket_selinux(8), svirt_tcg_selinux(8), svirt_tcg_selinux(8)
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257svirt 19-05-30 svirt_selinux(8)