1kmod_selinux(8) SELinux Policy kmod kmod_selinux(8)
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6 kmod_selinux - Security Enhanced Linux Policy for the kmod processes
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9 Security-Enhanced Linux secures the kmod processes via flexible manda‐
10 tory access control.
11 The kmod processes execute with the kmod_t SELinux type. You can check
13 if you have these processes running by executing the ps command with
14 the -Z qualifier.
15 For example:
17 ps -eZ | grep kmod_t
19
23 The kmod_t SELinux type can be entered via the kmod_exec_t file type.
24 The default entrypoint paths for the kmod_t domain are the following:
26 /sbin/rmmod.*, /sbin/depmod.*, /sbin/insmod.*, /sbin/modprobe.*,
28 /usr/sbin/rmmod.*, /usr/sbin/depmod.*, /usr/sbin/insmod.*,
29 /usr/sbin/modprobe.*, /bin/kmod, /usr/bin/kmod, /sbin/modules-update,
30 /sbin/update-modules, /usr/sbin/modules-update, /usr/sbin/update-mod‐
31 ules, /sbin/generate-modprobe.conf, /usr/sbin/generate-modprobe.conf
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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 kmod policy is very flexible allowing users to setup their kmod pro‐
41 cesses in as secure a method as possible.
42 The following process types are defined for kmod:
44 kmod_t
46 Note: semanage permissive -a kmod_t can be used to make the process
48 type kmod_t permissive. SELinux does not deny access to permissive
49 process types, but the AVC (SELinux denials) messages are still gener‐
50 ated.
51
54 SELinux policy is customizable based on least access required. kmod
55 policy is extremely flexible and has several booleans that allow you to
56 manipulate the policy and run kmod with the tightest access possible.
57 If you want to allow users to resolve user passwd entries directly from
61 ldap rather then using a sssd server, you must turn on the authlo‐
62 gin_nsswitch_use_ldap boolean. Disabled by default.
63 setsebool -P authlogin_nsswitch_use_ldap 1
65 If you want to deny user domains applications to map a memory region as
69 both executable and writable, this is dangerous and the executable
70 should be reported in bugzilla, you must turn on the deny_execmem bool‐
71 ean. Enabled by default.
72 setsebool -P deny_execmem 1
74 If you want to allow all domains to execute in fips_mode, you must turn
78 on the fips_mode boolean. Enabled by default.
79 setsebool -P fips_mode 1
81 If you want to allow confined applications to run with kerberos, you
85 must turn on the kerberos_enabled boolean. Enabled by default.
86 setsebool -P kerberos_enabled 1
88 If you want to control the ability to mmap a low area of the address
92 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
93 the mmap_low_allowed boolean. Disabled by default.
94 setsebool -P mmap_low_allowed 1
96 If you want to allow system to run with NIS, you must turn on the
100 nis_enabled boolean. Disabled by default.
101 setsebool -P nis_enabled 1
103 If you want to allow confined applications to use nscd shared memory,
107 you must turn on the nscd_use_shm boolean. Disabled by default.
108 setsebool -P nscd_use_shm 1
110 If you want to allow pppd to load kernel modules for certain modems,
114 you must turn on the pppd_can_insmod boolean. Disabled by default.
115 setsebool -P pppd_can_insmod 1
117 If you want to disable kernel module loading, you must turn on the
121 secure_mode_insmod boolean. Enabled by default.
122 setsebool -P secure_mode_insmod 1
124 If you want to allow unconfined executables to make their heap memory
128 executable. Doing this is a really bad idea. Probably indicates a
129 badly coded executable, but could indicate an attack. This executable
130 should be reported in bugzilla, you must turn on the selin‐
131 uxuser_execheap boolean. Disabled by default.
132 setsebool -P selinuxuser_execheap 1
134 If you want to allow unconfined executables to make their stack exe‐
138 cutable. This should never, ever be necessary. Probably indicates a
139 badly coded executable, but could indicate an attack. This executable
140 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
141 stack boolean. Enabled by default.
142 setsebool -P selinuxuser_execstack 1
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148 The SELinux process type kmod_t can manage files labeled with the fol‐
149 lowing file types. The paths listed are the default paths for these
150 file types. Note the processes UID still need to have DAC permissions.
151 file_type
153 all files on the system
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158 SELinux requires files to have an extended attribute to define the file
159 type.
160 You can see the context of a file using the -Z option to ls
162 Policy governs the access confined processes have to these files.
164 SELinux kmod policy is very flexible allowing users to setup their kmod
165 processes in as secure a method as possible.
166 STANDARD FILE CONTEXT
168 SELinux defines the file context types for the kmod, if you wanted to
170 store files with these types in a diffent paths, you need to execute
171 the semanage command to sepecify alternate labeling and then use
172 restorecon to put the labels on disk.
173 semanage fcontext -a -t kmod_tmpfs_t '/srv/mykmod_content(/.*)?'
175 restorecon -R -v /srv/mykmod_content
176 Note: SELinux often uses regular expressions to specify labels that
178 match multiple files.
179 The following file types are defined for kmod:
181 kmod_exec_t
185 - Set files with the kmod_exec_t type, if you want to transition an
187 executable to the kmod_t domain.
188 Paths:
191 /sbin/rmmod.*, /sbin/depmod.*, /sbin/insmod.*, /sbin/modprobe.*,
192 /usr/sbin/rmmod.*, /usr/sbin/depmod.*, /usr/sbin/insmod.*,
193 /usr/sbin/modprobe.*, /bin/kmod, /usr/bin/kmod, /sbin/modules-
194 update, /sbin/update-modules, /usr/sbin/modules-update,
195 /usr/sbin/update-modules, /sbin/generate-modprobe.conf,
196 /usr/sbin/generate-modprobe.conf
197 kmod_tmp_t
200 - Set files with the kmod_tmp_t type, if you want to store kmod tempo‐
202 rary files in the /tmp directories.
203 kmod_tmpfs_t
207 - Set files with the kmod_tmpfs_t type, if you want to store kmod files
209 on a tmpfs file system.
210 kmod_var_run_t
214 - Set files with the kmod_var_run_t type, if you want to store the kmod
216 files under the /run or /var/run directory.
217 Note: File context can be temporarily modified with the chcon command.
221 If you want to permanently change the file context you need to use the
222 semanage fcontext command. This will modify the SELinux labeling data‐
223 base. You will need to use restorecon to apply the labels.
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227 semanage fcontext can also be used to manipulate default file context
228 mappings.
229 semanage permissive can also be used to manipulate whether or not a
231 process type is permissive.
232 semanage module can also be used to enable/disable/install/remove pol‐
234 icy modules.
235 semanage boolean can also be used to manipulate the booleans
237 system-config-selinux is a GUI tool available to customize SELinux pol‐
240 icy settings.
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244 This manual page was auto-generated using sepolicy manpage .
245
248 selinux(8), kmod(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
249 setsebool(8)
250kmod 19-06-18 kmod_selinux(8)