1dmesg_selinux(8) SELinux Policy dmesg dmesg_selinux(8)
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6 dmesg_selinux - Security Enhanced Linux Policy for the dmesg processes
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9 Security-Enhanced Linux secures the dmesg processes via flexible manda‐
10 tory access control.
11 The dmesg processes execute with the dmesg_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 dmesg_t
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23 The dmesg_t SELinux type can be entered via the dmesg_exec_t file type.
24 The default entrypoint paths for the dmesg_t domain are the following:
26 /bin/dmesg
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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 dmesg policy is very flexible allowing users to setup their dmesg pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for dmesg:
40 dmesg_t
42 Note: semanage permissive -a dmesg_t can be used to make the process
44 type dmesg_t permissive. SELinux does not deny access to permissive
45 process types, but the AVC (SELinux denials) messages are still gener‐
46 ated.
47
50 SELinux policy is customizable based on least access required. dmesg
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run dmesg with the tightest access possible.
53 If you want to allow all daemons the ability to read/write terminals,
57 you must turn on the allow_daemons_use_tty boolean. Disabled by
58 default.
59 setsebool -P allow_daemons_use_tty 1
61 If you want to allow all domains to use other domains file descriptors,
65 you must turn on the allow_domain_fd_use boolean. Enabled by default.
66 setsebool -P allow_domain_fd_use 1
68 If you want to allow sysadm to debug or ptrace all processes, you must
72 turn on the allow_ptrace boolean. Disabled by default.
73 setsebool -P allow_ptrace 1
75 If you want to allow all domains to have the kernel load modules, you
79 must turn on the domain_kernel_load_modules boolean. Disabled by
80 default.
81 setsebool -P domain_kernel_load_modules 1
83 If you want to allow all domains to execute in fips_mode, you must turn
87 on the fips_mode boolean. Enabled by default.
88 setsebool -P fips_mode 1
90 If you want to enable reading of urandom for all domains, you must turn
94 on the global_ssp boolean. Disabled by default.
95 setsebool -P global_ssp 1
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101 The SELinux process type dmesg_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 abrt_var_run_t
106 /var/run/abrt(/.*)?
108 /var/run/abrtd?.lock
109 /var/run/abrtd?.socket
110 /var/run/abrt.pid
111 initrc_tmp_t
113 mnt_t
116 /mnt(/[^/]*)
118 /mnt(/[^/]*)?
119 /rhev(/[^/]*)?
120 /media(/[^/]*)
121 /media(/[^/]*)?
122 /etc/rhgb(/.*)?
123 /media/.hal-.*
124 /net
125 /afs
126 /rhev
127 /misc
128 tmp_t
130 /tmp
132 /usr/tmp
133 /var/tmp
134 /tmp-inst
135 /var/tmp-inst
136 /var/tmp/vi.recover
137 var_log_t
139 /var/log/.*
141 /nsr/logs(/.*)?
142 /var/webmin(/.*)?
143 /var/log/secure[^/]*
144 /opt/zimbra/log(/.*)?
145 /var/log/maillog[^/]*
146 /var/log/spooler[^/]*
147 /var/log/messages[^/]*
148 /usr/centreon/log(/.*)?
149 /var/spool/rsyslog(/.*)?
150 /var/axfrdns/log/main(/.*)?
151 /var/spool/bacula/log(/.*)?
152 /var/tinydns/log/main(/.*)?
153 /var/dnscache/log/main(/.*)?
154 /var/stockmaniac/templates_cache(/.*)?
155 /opt/Symantec/scspagent/IDS/system(/.*)?
156 /var/log
157 /var/log/dmesg
158 /var/log/syslog
159 /var/named/chroot/var/log
160
163 SELinux requires files to have an extended attribute to define the file
164 type.
165 You can see the context of a file using the -Z option to ls
167 Policy governs the access confined processes have to these files.
169 SELinux dmesg policy is very flexible allowing users to setup their
170 dmesg processes in as secure a method as possible.
171 The following file types are defined for dmesg:
173 dmesg_exec_t
177 - Set files with the dmesg_exec_t type, if you want to transition an
179 executable to the dmesg_t domain.
180 Note: File context can be temporarily modified with the chcon command.
184 If you want to permanently change the file context you need to use the
185 semanage fcontext command. This will modify the SELinux labeling data‐
186 base. You will need to use restorecon to apply the labels.
187
190 semanage fcontext can also be used to manipulate default file context
191 mappings.
192 semanage permissive can also be used to manipulate whether or not a
194 process type is permissive.
195 semanage module can also be used to enable/disable/install/remove pol‐
197 icy modules.
198 semanage boolean can also be used to manipulate the booleans
200 system-config-selinux is a GUI tool available to customize SELinux pol‐
203 icy settings.
204
207 This manual page was auto-generated using sepolicy manpage .
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211 selinux(8), dmesg(8), semanage(8), restorecon(8), chcon(1) , setse‐
212 bool(8)
213dmesg 15-06-03 dmesg_selinux(8)