1insmod_selinux(8) SELinux Policy insmod insmod_selinux(8)
2
6 insmod_selinux - Security Enhanced Linux Policy for the insmod pro‐
7 cesses
8
10 Security-Enhanced Linux secures the insmod processes via flexible
11 mandatory access control.
12 The insmod processes execute with the insmod_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 insmod_t
20
24 The insmod_t SELinux type can be entered via the file_type, unla‐
25 beled_t, proc_type, filesystem_type, mtrr_device_t, sysctl_type, ins‐
26 mod_exec_t file types.
27 The default entrypoint paths for the insmod_t domain are the following:
29 all files on the system, /dev/cpu/mtrr, /sbin/rmmod.*, /sbin/insmod.*,
31 /sbin/modprobe.*
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 insmod policy is very flexible allowing users to setup their insmod
41 processes in as secure a method as possible.
42 The following process types are defined for insmod:
44 insmod_t
46 Note: semanage permissive -a insmod_t can be used to make the process
48 type insmod_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. insmod
55 policy is extremely flexible and has several booleans that allow you to
56 manipulate the policy and run insmod with the tightest access possible.
57 If you want to allow all domains to use other domains file descriptors,
61 you must turn on the allow_domain_fd_use boolean. Enabled by default.
62 setsebool -P allow_domain_fd_use 1
64 If you want to allow unconfined executables to make their heap memory
68 executable. Doing this is a really bad idea. Probably indicates a
69 badly coded executable, but could indicate an attack. This executable
70 should be reported in bugzilla, you must turn on the allow_execheap
71 boolean. Disabled by default.
72 setsebool -P allow_execheap 1
74 If you want to allow unconfined executables to map a memory region as
78 both executable and writable, this is dangerous and the executable
79 should be reported in bugzilla), you must turn on the allow_execmem
80 boolean. Enabled by default.
81 setsebool -P allow_execmem 1
83 If you want to allow all unconfined executables to use libraries
87 requiring text relocation that are not labeled textrel_shlib_t), you
88 must turn on the allow_execmod boolean. Enabled by default.
89 setsebool -P allow_execmod 1
91 If you want to allow unconfined executables to make their stack exe‐
95 cutable. This should never, ever be necessary. Probably indicates a
96 badly coded executable, but could indicate an attack. This executable
97 should be reported in bugzilla), you must turn on the allow_execstack
98 boolean. Enabled by default.
99 setsebool -P allow_execstack 1
101 If you want to allow sysadm to debug or ptrace all processes, you must
105 turn on the allow_ptrace boolean. Disabled by default.
106 setsebool -P allow_ptrace 1
108 If you want to allow system to run with NIS, you must turn on the
112 allow_ypbind boolean. Disabled by default.
113 setsebool -P allow_ypbind 1
115 If you want to allow all domains to have the kernel load modules, you
119 must turn on the domain_kernel_load_modules boolean. Disabled by
120 default.
121 setsebool -P domain_kernel_load_modules 1
123 If you want to allow all domains to execute in fips_mode, you must turn
127 on the fips_mode boolean. Enabled by default.
128 setsebool -P fips_mode 1
130 If you want to enable reading of urandom for all domains, you must turn
134 on the global_ssp boolean. Disabled by default.
135 setsebool -P global_ssp 1
137 If you want to allow certain domains to map low memory in the kernel,
141 you must turn on the mmap_low_allowed boolean. Disabled by default.
142 setsebool -P mmap_low_allowed 1
144 If you want to allow pppd to load kernel modules for certain modems,
148 you must turn on the pppd_can_insmod boolean. Disabled by default.
149 setsebool -P pppd_can_insmod 1
151 If you want to disable transitions to insmod, you must turn on the
155 secure_mode_insmod boolean. Disabled by default.
156 setsebool -P secure_mode_insmod 1
158 If you want to boolean to determine whether the system permits loading
162 policy, setting enforcing mode, and changing boolean values. Set this
163 to true and you have to reboot to set it back, you must turn on the
164 secure_mode_policyload boolean. Disabled by default.
165 setsebool -P secure_mode_policyload 1
167 If you want to support X userspace object manager, you must turn on the
171 xserver_object_manager boolean. Disabled by default.
172 setsebool -P xserver_object_manager 1
174
178 The SELinux process type insmod_t can manage files labeled with the
179 following file types. The paths listed are the default paths for these
180 file types. Note the processes UID still need to have DAC permissions.
181 file_type
183 all files on the system
185
188 SELinux requires files to have an extended attribute to define the file
189 type.
190 You can see the context of a file using the -Z option to ls
192 Policy governs the access confined processes have to these files.
194 SELinux insmod policy is very flexible allowing users to setup their
195 insmod processes in as secure a method as possible.
196 STANDARD FILE CONTEXT
198 SELinux defines the file context types for the insmod, if you wanted to
200 store files with these types in a diffent paths, you need to execute
201 the semanage command to sepecify alternate labeling and then use
202 restorecon to put the labels on disk.
203 semanage fcontext -a -t insmod_tmpfs_t '/srv/myinsmod_content(/.*)?'
205 restorecon -R -v /srv/myinsmod_content
206 Note: SELinux often uses regular expressions to specify labels that
208 match multiple files.
209 The following file types are defined for insmod:
211 insmod_exec_t
215 - Set files with the insmod_exec_t type, if you want to transition an
217 executable to the insmod_t domain.
218 Paths:
221 /sbin/rmmod.*, /sbin/insmod.*, /sbin/modprobe.*
222 insmod_tmpfs_t
225 - Set files with the insmod_tmpfs_t type, if you want to store insmod
227 files on a tmpfs file system.
228 Note: File context can be temporarily modified with the chcon command.
232 If you want to permanently change the file context you need to use the
233 semanage fcontext command. This will modify the SELinux labeling data‐
234 base. You will need to use restorecon to apply the labels.
235
238 semanage fcontext can also be used to manipulate default file context
239 mappings.
240 semanage permissive can also be used to manipulate whether or not a
242 process type is permissive.
243 semanage module can also be used to enable/disable/install/remove pol‐
245 icy modules.
246 semanage boolean can also be used to manipulate the booleans
248 system-config-selinux is a GUI tool available to customize SELinux pol‐
251 icy settings.
252
255 This manual page was auto-generated using sepolicy manpage .
256
259 selinux(8), insmod(8), semanage(8), restorecon(8), chcon(1) , setse‐
260 bool(8)
261insmod 15-06-03 insmod_selinux(8)