1mdadm_selinux(8) SELinux Policy mdadm mdadm_selinux(8)
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6 mdadm_selinux - Security Enhanced Linux Policy for the mdadm processes
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9 Security-Enhanced Linux secures the mdadm processes via flexible manda‐
10 tory access control.
11 The mdadm processes execute with the mdadm_t SELinux type. You can
13 check if you have these processes running by executing the ps command
14 with the -Z qualifier.
15 For example:
17 ps -eZ | grep mdadm_t
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23 The mdadm_t SELinux type can be entered via the file_type,
24 mdadm_exec_t, unlabeled_t, proc_type, filesystem_type, mtrr_device_t,
25 sysctl_type file types.
26 The default entrypoint paths for the mdadm_t domain are the following:
28 all files on the system, /sbin/mdadm, /sbin/mdmpd, /usr/sbin/iprdump,
30 /usr/sbin/iprinit, /usr/sbin/iprupdate, /dev/cpu/mtrr
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33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 mdadm policy is very flexible allowing users to setup their mdadm pro‐
40 cesses in as secure a method as possible.
41 The following process types are defined for mdadm:
43 mdadm_t
45 Note: semanage permissive -a mdadm_t can be used to make the process
47 type mdadm_t permissive. SELinux does not deny access to permissive
48 process types, but the AVC (SELinux denials) messages are still gener‐
49 ated.
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53 SELinux policy is customizable based on least access required. mdadm
54 policy is extremely flexible and has several booleans that allow you to
55 manipulate the policy and run mdadm with the tightest access possible.
56 If you want to allow all daemons to write corefiles to /, you must turn
60 on the allow_daemons_dump_core boolean. Disabled by default.
61 setsebool -P allow_daemons_dump_core 1
63 If you want to allow all daemons to use tcp wrappers, you must turn on
67 the allow_daemons_use_tcp_wrapper boolean. Disabled by default.
68 setsebool -P allow_daemons_use_tcp_wrapper 1
70 If you want to allow all daemons the ability to read/write terminals,
74 you must turn on the allow_daemons_use_tty boolean. Disabled by
75 default.
76 setsebool -P allow_daemons_use_tty 1
78 If you want to allow all domains to use other domains file descriptors,
82 you must turn on the allow_domain_fd_use boolean. Enabled by default.
83 setsebool -P allow_domain_fd_use 1
85 If you want to allow unconfined executables to make their heap memory
89 executable. Doing this is a really bad idea. Probably indicates a
90 badly coded executable, but could indicate an attack. This executable
91 should be reported in bugzilla, you must turn on the allow_execheap
92 boolean. Disabled by default.
93 setsebool -P allow_execheap 1
95 If you want to allow unconfined executables to map a memory region as
99 both executable and writable, this is dangerous and the executable
100 should be reported in bugzilla), you must turn on the allow_execmem
101 boolean. Enabled by default.
102 setsebool -P allow_execmem 1
104 If you want to allow all unconfined executables to use libraries
108 requiring text relocation that are not labeled textrel_shlib_t), you
109 must turn on the allow_execmod boolean. Enabled by default.
110 setsebool -P allow_execmod 1
112 If you want to allow unconfined executables to make their stack exe‐
116 cutable. This should never, ever be necessary. Probably indicates a
117 badly coded executable, but could indicate an attack. This executable
118 should be reported in bugzilla), you must turn on the allow_execstack
119 boolean. Enabled by default.
120 setsebool -P allow_execstack 1
122 If you want to allow sysadm to debug or ptrace all processes, you must
126 turn on the allow_ptrace boolean. Disabled by default.
127 setsebool -P allow_ptrace 1
129 If you want to enable cluster mode for daemons, you must turn on the
133 daemons_enable_cluster_mode boolean. Disabled by default.
134 setsebool -P daemons_enable_cluster_mode 1
136 If you want to allow all domains to have the kernel load modules, you
140 must turn on the domain_kernel_load_modules boolean. Disabled by
141 default.
142 setsebool -P domain_kernel_load_modules 1
144 If you want to allow all domains to execute in fips_mode, you must turn
148 on the fips_mode boolean. Enabled by default.
149 setsebool -P fips_mode 1
151 If you want to enable reading of urandom for all domains, you must turn
155 on the global_ssp boolean. Disabled by default.
156 setsebool -P global_ssp 1
158 If you want to enable support for upstart as the init program, you must
162 turn on the init_upstart boolean. Enabled by default.
163 setsebool -P init_upstart 1
165 If you want to allow certain domains to map low memory in the kernel,
169 you must turn on the mmap_low_allowed boolean. Disabled by default.
170 setsebool -P mmap_low_allowed 1
172 If you want to boolean to determine whether the system permits loading
176 policy, setting enforcing mode, and changing boolean values. Set this
177 to true and you have to reboot to set it back, you must turn on the
178 secure_mode_policyload boolean. Disabled by default.
179 setsebool -P secure_mode_policyload 1
181 If you want to support X userspace object manager, you must turn on the
185 xserver_object_manager boolean. Disabled by default.
186 setsebool -P xserver_object_manager 1
188
192 The SELinux process type mdadm_t can manage files labeled with the fol‐
193 lowing file types. The paths listed are the default paths for these
194 file types. Note the processes UID still need to have DAC permissions.
195 file_type
197 all files on the system
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202 SELinux requires files to have an extended attribute to define the file
203 type.
204 You can see the context of a file using the -Z option to ls
206 Policy governs the access confined processes have to these files.
208 SELinux mdadm policy is very flexible allowing users to setup their
209 mdadm processes in as secure a method as possible.
210 STANDARD FILE CONTEXT
212 SELinux defines the file context types for the mdadm, if you wanted to
214 store files with these types in a diffent paths, you need to execute
215 the semanage command to sepecify alternate labeling and then use
216 restorecon to put the labels on disk.
217 semanage fcontext -a -t mdadm_var_run_t '/srv/mymdadm_content(/.*)?'
219 restorecon -R -v /srv/mymdadm_content
220 Note: SELinux often uses regular expressions to specify labels that
222 match multiple files.
223 The following file types are defined for mdadm:
225 mdadm_exec_t
229 - Set files with the mdadm_exec_t type, if you want to transition an
231 executable to the mdadm_t domain.
232 Paths:
235 /sbin/mdadm, /sbin/mdmpd, /usr/sbin/iprdump, /usr/sbin/iprinit,
236 /usr/sbin/iprupdate
237 mdadm_map_t
240 - Set files with the mdadm_map_t type, if you want to treat the files
242 as mdadm map data.
243 mdadm_var_run_t
247 - Set files with the mdadm_var_run_t type, if you want to store the
249 mdadm files under the /run or /var/run directory.
250 Note: File context can be temporarily modified with the chcon command.
254 If you want to permanently change the file context you need to use the
255 semanage fcontext command. This will modify the SELinux labeling data‐
256 base. You will need to use restorecon to apply the labels.
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260 semanage fcontext can also be used to manipulate default file context
261 mappings.
262 semanage permissive can also be used to manipulate whether or not a
264 process type is permissive.
265 semanage module can also be used to enable/disable/install/remove pol‐
267 icy modules.
268 semanage boolean can also be used to manipulate the booleans
270 system-config-selinux is a GUI tool available to customize SELinux pol‐
273 icy settings.
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277 This manual page was auto-generated using sepolicy manpage .
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281 selinux(8), mdadm(8), semanage(8), restorecon(8), chcon(1) , setse‐
282 bool(8)
283mdadm 15-06-03 mdadm_selinux(8)