1install_selinux(8) SELinux Policy install install_selinux(8)
2
6 install_selinux - Security Enhanced Linux Policy for the install pro‐
7 cesses
8
10 Security-Enhanced Linux secures the install processes via flexible
11 mandatory access control.
12 The install processes execute with the install_t SELinux type. You can
14 check if you have these processes running by executing the ps command
15 with the -Z qualifier.
16 For example:
18 ps -eZ | grep install_t
20
24 The install_t SELinux type can be entered via the install_exec_t file
25 type.
26 The default entrypoint paths for the install_t domain are the follow‐
28 ing:
29 /usr/bin/ostree, /usr/sbin/anaconda, /usr/bin/rpm-ostree, /usr/bin/ini‐
31 tial-setup, /usr/libexec/rpm-ostreed, /usr/libexec/anaconda/anaconda-
32 yum
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 install policy is very flexible allowing users to setup their install
42 processes in as secure a method as possible.
43 The following process types are defined for install:
45 install_t
47 Note: semanage permissive -a install_t can be used to make the process
49 type install_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. install
56 policy is extremely flexible and has several booleans that allow you to
57 manipulate the policy and run install with the tightest access possi‐
58 ble.
59 If you want to deny user domains applications to map a memory region as
63 both executable and writable, this is dangerous and the executable
64 should be reported in bugzilla, you must turn on the deny_execmem bool‐
65 ean. Enabled by default.
66 setsebool -P deny_execmem 1
68 If you want to control the ability to mmap a low area of the address
72 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
73 the mmap_low_allowed boolean. Disabled by default.
74 setsebool -P mmap_low_allowed 1
76 If you want to disable kernel module loading, you must turn on the se‐
80 cure_mode_insmod boolean. Enabled by default.
81 setsebool -P secure_mode_insmod 1
83 If you want to allow unconfined executables to make their heap memory
87 executable. Doing this is a really bad idea. Probably indicates a
88 badly coded executable, but could indicate an attack. This executable
89 should be reported in bugzilla, you must turn on the selinuxuser_ex‐
90 echeap boolean. Disabled by default.
91 setsebool -P selinuxuser_execheap 1
93 If you want to allow unconfined executables to make their stack exe‐
97 cutable. This should never, ever be necessary. Probably indicates a
98 badly coded executable, but could indicate an attack. This executable
99 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
100 stack boolean. Enabled by default.
101 setsebool -P selinuxuser_execstack 1
103
107 The SELinux process type install_t can manage files labeled with the
108 following file types. The paths listed are the default paths for these
109 file types. Note the processes UID still need to have DAC permissions.
110 file_type
112 all files on the system
114
117 SELinux requires files to have an extended attribute to define the file
118 type.
119 You can see the context of a file using the -Z option to ls
121 Policy governs the access confined processes have to these files.
123 SELinux install policy is very flexible allowing users to setup their
124 install processes in as secure a method as possible.
125 STANDARD FILE CONTEXT
127 SELinux defines the file context types for the install, if you wanted
129 to store files with these types in a diffent paths, you need to execute
130 the semanage command to specify alternate labeling and then use re‐
131 storecon to put the labels on disk.
132 semanage fcontext -a -t install_var_run_t '/srv/myinstall_con‐
134 tent(/.*)?'
135 restorecon -R -v /srv/myinstall_content
136 Note: SELinux often uses regular expressions to specify labels that
138 match multiple files.
139 The following file types are defined for install:
141 install_exec_t
145 - Set files with the install_exec_t type, if you want to transition an
147 executable to the install_t domain.
148 Paths:
151 /usr/bin/ostree, /usr/sbin/anaconda, /usr/bin/rpm-ostree,
152 /usr/bin/initial-setup, /usr/libexec/rpm-ostreed,
153 /usr/libexec/anaconda/anaconda-yum
154 install_var_run_t
157 - Set files with the install_var_run_t type, if you want to store the
159 install files under the /run or /var/run directory.
160 Note: File context can be temporarily modified with the chcon command.
164 If you want to permanently change the file context you need to use the
165 semanage fcontext command. This will modify the SELinux labeling data‐
166 base. You will need to use restorecon to apply the labels.
167
170 semanage fcontext can also be used to manipulate default file context
171 mappings.
172 semanage permissive can also be used to manipulate whether or not a
174 process type is permissive.
175 semanage module can also be used to enable/disable/install/remove pol‐
177 icy modules.
178 semanage boolean can also be used to manipulate the booleans
180 system-config-selinux is a GUI tool available to customize SELinux pol‐
183 icy settings.
184
187 This manual page was auto-generated using sepolicy manpage .
188
191 selinux(8), install(8), semanage(8), restorecon(8), chcon(1), sepol‐
192 icy(8), setsebool(8)
193install 23-02-03 install_selinux(8)