1preupgrade_selinux(8) SELinux Policy preupgrade preupgrade_selinux(8)
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6 preupgrade_selinux - Security Enhanced Linux Policy for the preupgrade
7 processes
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10 Security-Enhanced Linux secures the preupgrade processes via flexible
11 mandatory access control.
12 The preupgrade processes execute with the preupgrade_t SELinux type.
14 You can check if you have these processes running by executing the ps
15 command with the -Z qualifier.
16 For example:
18 ps -eZ | grep preupgrade_t
20
24 The preupgrade_t SELinux type can be entered via the file_type, preup‐
25 grade_exec_t, unlabeled_t, proc_type, filesystem_type, mtrr_device_t,
26 sysctl_type file types.
27 The default entrypoint paths for the preupgrade_t domain are the fol‐
29 lowing:
30 all files on the system, /usr/bin/preupg.*, /dev/cpu/mtrr
32
34 SELinux defines process types (domains) for each process running on the
35 system
36 You can see the context of a process using the -Z option to ps
38 Policy governs the access confined processes have to files. SELinux
40 preupgrade policy is very flexible allowing users to setup their preup‐
41 grade processes in as secure a method as possible.
42 The following process types are defined for preupgrade:
44 preupgrade_t
46 Note: semanage permissive -a preupgrade_t can be used to make the
48 process type preupgrade_t permissive. SELinux does not deny access to
49 permissive process types, but the AVC (SELinux denials) messages are
50 still generated.
51
54 SELinux policy is customizable based on least access required. preup‐
55 grade policy is extremely flexible and has several booleans that allow
56 you to manipulate the policy and run preupgrade with the tightest
57 access possible.
58 If you want to allow all domains to use other domains file descriptors,
62 you must turn on the allow_domain_fd_use boolean. Enabled by default.
63 setsebool -P allow_domain_fd_use 1
65 If you want to allow unconfined executables to make their heap memory
69 executable. Doing this is a really bad idea. Probably indicates a
70 badly coded executable, but could indicate an attack. This executable
71 should be reported in bugzilla, you must turn on the allow_execheap
72 boolean. Disabled by default.
73 setsebool -P allow_execheap 1
75 If you want to allow unconfined executables to map a memory region as
79 both executable and writable, this is dangerous and the executable
80 should be reported in bugzilla), you must turn on the allow_execmem
81 boolean. Enabled by default.
82 setsebool -P allow_execmem 1
84 If you want to allow all unconfined executables to use libraries
88 requiring text relocation that are not labeled textrel_shlib_t), you
89 must turn on the allow_execmod boolean. Enabled by default.
90 setsebool -P allow_execmod 1
92 If you want to allow unconfined executables to make their stack exe‐
96 cutable. This should never, ever be necessary. Probably indicates a
97 badly coded executable, but could indicate an attack. This executable
98 should be reported in bugzilla), you must turn on the allow_execstack
99 boolean. Enabled by default.
100 setsebool -P allow_execstack 1
102 If you want to allow sysadm to debug or ptrace all processes, you must
106 turn on the allow_ptrace boolean. Disabled by default.
107 setsebool -P allow_ptrace 1
109 If you want to allow all domains to have the kernel load modules, you
113 must turn on the domain_kernel_load_modules boolean. Disabled by
114 default.
115 setsebool -P domain_kernel_load_modules 1
117 If you want to allow all domains to execute in fips_mode, you must turn
121 on the fips_mode boolean. Enabled by default.
122 setsebool -P fips_mode 1
124 If you want to enable reading of urandom for all domains, you must turn
128 on the global_ssp boolean. Disabled by default.
129 setsebool -P global_ssp 1
131 If you want to allow Apache to run preupgrade, you must turn on the
135 httpd_run_preupgrade boolean. Disabled by default.
136 setsebool -P httpd_run_preupgrade 1
138 If you want to allow certain domains to map low memory in the kernel,
142 you must turn on the mmap_low_allowed boolean. Disabled by default.
143 setsebool -P mmap_low_allowed 1
145 If you want to boolean to determine whether the system permits loading
149 policy, setting enforcing mode, and changing boolean values. Set this
150 to true and you have to reboot to set it back, you must turn on the
151 secure_mode_policyload boolean. Disabled by default.
152 setsebool -P secure_mode_policyload 1
154 If you want to support X userspace object manager, you must turn on the
158 xserver_object_manager boolean. Disabled by default.
159 setsebool -P xserver_object_manager 1
161
165 SELinux defines port types to represent TCP and UDP ports.
166 You can see the types associated with a port by using the following
168 command:
169 semanage port -l
171 Policy governs the access confined processes have to these ports.
174 SELinux preupgrade policy is very flexible allowing users to setup
175 their preupgrade processes in as secure a method as possible.
176 The following port types are defined for preupgrade:
178 preupgrade_port_t
181 Default Defined Ports:
185 tcp 8099
186
188 The SELinux process type preupgrade_t can manage files labeled with the
189 following file types. The paths listed are the default paths for these
190 file types. Note the processes UID still need to have DAC permissions.
191 file_type
193 all files on the system
195
198 SELinux requires files to have an extended attribute to define the file
199 type.
200 You can see the context of a file using the -Z option to ls
202 Policy governs the access confined processes have to these files.
204 SELinux preupgrade policy is very flexible allowing users to setup
205 their preupgrade processes in as secure a method as possible.
206 STANDARD FILE CONTEXT
208 SELinux defines the file context types for the preupgrade, if you
210 wanted to store files with these types in a diffent paths, you need to
211 execute the semanage command to sepecify alternate labeling and then
212 use restorecon to put the labels on disk.
213 semanage fcontext -a -t preupgrade_data_t '/srv/mypreupgrade_con‐
215 tent(/.*)?'
216 restorecon -R -v /srv/mypreupgrade_content
217 Note: SELinux often uses regular expressions to specify labels that
219 match multiple files.
220 The following file types are defined for preupgrade:
222 preupgrade_data_t
226 - Set files with the preupgrade_data_t type, if you want to treat the
228 files as preupgrade content.
229 Paths:
232 /var/lib/preupgrade(/.*)?, /var/log/preupgrade(/.*)?
233 preupgrade_exec_t
236 - Set files with the preupgrade_exec_t type, if you want to transition
238 an executable to the preupgrade_t domain.
239 Note: File context can be temporarily modified with the chcon command.
243 If you want to permanently change the file context you need to use the
244 semanage fcontext command. This will modify the SELinux labeling data‐
245 base. You will need to use restorecon to apply the labels.
246
249 semanage fcontext can also be used to manipulate default file context
250 mappings.
251 semanage permissive can also be used to manipulate whether or not a
253 process type is permissive.
254 semanage module can also be used to enable/disable/install/remove pol‐
256 icy modules.
257 semanage port can also be used to manipulate the port definitions
259 semanage boolean can also be used to manipulate the booleans
261 system-config-selinux is a GUI tool available to customize SELinux pol‐
264 icy settings.
265
268 This manual page was auto-generated using sepolicy manpage .
269
272 selinux(8), preupgrade(8), semanage(8), restorecon(8), chcon(1) , set‐
273 sebool(8)
274preupgrade 15-06-03 preupgrade_selinux(8)