1clvmd_selinux(8) SELinux Policy clvmd clvmd_selinux(8)
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6 clvmd_selinux - Security Enhanced Linux Policy for the clvmd processes
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9 Security-Enhanced Linux secures the clvmd processes via flexible manda‐
10 tory access control.
11 The clvmd processes execute with the clvmd_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 clvmd_t
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23 The clvmd_t SELinux type can be entered via the clvmd_exec_t file type.
24 The default entrypoint paths for the clvmd_t domain are the following:
26 /usr/sbin/clvmd
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30 SELinux defines process types (domains) for each process running on the
31 system
32 You can see the context of a process using the -Z option to ps
34 Policy governs the access confined processes have to files. SELinux
36 clvmd policy is very flexible allowing users to setup their clvmd pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for clvmd:
40 clvmd_t
42 Note: semanage permissive -a clvmd_t can be used to make the process
44 type clvmd_t permissive. SELinux does not deny access to permissive
45 process types, but the AVC (SELinux denials) messages are still gener‐
46 ated.
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50 SELinux policy is customizable based on least access required. clvmd
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run clvmd with the tightest access possible.
53 If you want to deny user domains applications to map a memory region as
57 both executable and writable, this is dangerous and the executable
58 should be reported in bugzilla, you must turn on the deny_execmem bool‐
59 ean. Enabled by default.
60 setsebool -P deny_execmem 1
62 If you want to control the ability to mmap a low area of the address
66 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
67 the mmap_low_allowed boolean. Disabled by default.
68 setsebool -P mmap_low_allowed 1
70 If you want to disable kernel module loading, you must turn on the se‐
74 cure_mode_insmod boolean. Enabled by default.
75 setsebool -P secure_mode_insmod 1
77 If you want to allow unconfined executables to make their heap memory
81 executable. Doing this is a really bad idea. Probably indicates a
82 badly coded executable, but could indicate an attack. This executable
83 should be reported in bugzilla, you must turn on the selinuxuser_ex‐
84 echeap boolean. Disabled by default.
85 setsebool -P selinuxuser_execheap 1
87 If you want to allow unconfined executables to make their stack exe‐
91 cutable. This should never, ever be necessary. Probably indicates a
92 badly coded executable, but could indicate an attack. This executable
93 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
94 stack boolean. Enabled by default.
95 setsebool -P selinuxuser_execstack 1
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101 The SELinux process type clvmd_t can manage files labeled with the fol‐
102 lowing file types. The paths listed are the default paths for these
103 file types. Note the processes UID still need to have DAC permissions.
104 file_type
106 all files on the system
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111 SELinux requires files to have an extended attribute to define the file
112 type.
113 You can see the context of a file using the -Z option to ls
115 Policy governs the access confined processes have to these files.
117 SELinux clvmd policy is very flexible allowing users to setup their
118 clvmd processes in as secure a method as possible.
119 STANDARD FILE CONTEXT
121 SELinux defines the file context types for the clvmd, if you wanted to
123 store files with these types in a diffent paths, you need to execute
124 the semanage command to specify alternate labeling and then use re‐
125 storecon to put the labels on disk.
126 semanage fcontext -a -t clvmd_var_run_t '/srv/myclvmd_content(/.*)?'
128 restorecon -R -v /srv/myclvmd_content
129 Note: SELinux often uses regular expressions to specify labels that
131 match multiple files.
132 The following file types are defined for clvmd:
134 clvmd_exec_t
138 - Set files with the clvmd_exec_t type, if you want to transition an
140 executable to the clvmd_t domain.
141 clvmd_initrc_exec_t
145 - Set files with the clvmd_initrc_exec_t type, if you want to transi‐
147 tion an executable to the clvmd_initrc_t domain.
148 clvmd_tmpfs_t
152 - Set files with the clvmd_tmpfs_t type, if you want to store clvmd
154 files on a tmpfs file system.
155 clvmd_var_run_t
159 - Set files with the clvmd_var_run_t type, if you want to store the
161 clvmd files under the /run or /var/run directory.
162 Note: File context can be temporarily modified with the chcon command.
166 If you want to permanently change the file context you need to use the
167 semanage fcontext command. This will modify the SELinux labeling data‐
168 base. You will need to use restorecon to apply the labels.
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172 semanage fcontext can also be used to manipulate default file context
173 mappings.
174 semanage permissive can also be used to manipulate whether or not a
176 process type is permissive.
177 semanage module can also be used to enable/disable/install/remove pol‐
179 icy modules.
180 semanage boolean can also be used to manipulate the booleans
182 system-config-selinux is a GUI tool available to customize SELinux pol‐
185 icy settings.
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189 This manual page was auto-generated using sepolicy manpage .
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193 selinux(8), clvmd(8), semanage(8), restorecon(8), chcon(1), sepol‐
194 icy(8), setsebool(8)
195clvmd 21-11-19 clvmd_selinux(8)