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.
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12 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.
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16 For example:
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18 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.
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25 The default entrypoint paths for the dmesg_t domain are the following:
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27 /bin/dmesg, /usr/bin/dmesg
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30 SELinux defines process types (domains) for each process running on the
31 system
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33 You can see the context of a process using the -Z option to ps
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35 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.
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39 The following process types are defined for dmesg:
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41 dmesg_t
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43 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.
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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.
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56 If you want to allow all domains to execute in fips_mode, you must turn
57 on the fips_mode boolean. Enabled by default.
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59 setsebool -P fips_mode 1
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64 The SELinux process type dmesg_t can manage files labeled with the fol‐
65 lowing file types. The paths listed are the default paths for these
66 file types. Note the processes UID still need to have DAC permissions.
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68 var_log_t
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70 /var/log/.*
71 /nsr/logs(/.*)?
72 /var/webmin(/.*)?
73 /var/log/secure[^/]*
74 /opt/zimbra/log(/.*)?
75 /var/log/maillog[^/]*
76 /var/log/spooler[^/]*
77 /var/log/messages[^/]*
78 /usr/centreon/log(/.*)?
79 /var/spool/rsyslog(/.*)?
80 /var/axfrdns/log/main(/.*)?
81 /var/spool/bacula/log(/.*)?
82 /var/tinydns/log/main(/.*)?
83 /var/dnscache/log/main(/.*)?
84 /var/stockmaniac/templates_cache(/.*)?
85 /opt/Symantec/scspagent/IDS/system(/.*)?
86 /var/log
87 /var/log/dmesg
88 /var/log/syslog
89 /var/named/chroot/var/log
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93 SELinux requires files to have an extended attribute to define the file
94 type.
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96 You can see the context of a file using the -Z option to ls
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98 Policy governs the access confined processes have to these files.
99 SELinux dmesg policy is very flexible allowing users to setup their
100 dmesg processes in as secure a method as possible.
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102 STANDARD FILE CONTEXT
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104 SELinux defines the file context types for the dmesg, if you wanted to
105 store files with these types in a different paths, you need to execute
106 the semanage command to specify alternate labeling and then use re‐
107 storecon to put the labels on disk.
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109 semanage fcontext -a -t dmesg_exec_t '/srv/dmesg/content(/.*)?'
110 restorecon -R -v /srv/mydmesg_content
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112 Note: SELinux often uses regular expressions to specify labels that
113 match multiple files.
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115 The following file types are defined for dmesg:
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119 dmesg_exec_t
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121 - Set files with the dmesg_exec_t type, if you want to transition an
122 executable to the dmesg_t domain.
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125 Paths:
126 /bin/dmesg, /usr/bin/dmesg
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129 Note: File context can be temporarily modified with the chcon command.
130 If you want to permanently change the file context you need to use the
131 semanage fcontext command. This will modify the SELinux labeling data‐
132 base. You will need to use restorecon to apply the labels.
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136 semanage fcontext can also be used to manipulate default file context
137 mappings.
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139 semanage permissive can also be used to manipulate whether or not a
140 process type is permissive.
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142 semanage module can also be used to enable/disable/install/remove pol‐
143 icy modules.
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145 semanage boolean can also be used to manipulate the booleans
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148 system-config-selinux is a GUI tool available to customize SELinux pol‐
149 icy settings.
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153 This manual page was auto-generated using sepolicy manpage .
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157 selinux(8), dmesg(8), semanage(8), restorecon(8), chcon(1), sepol‐
158 icy(8), setsebool(8)
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162dmesg 23-10-20 dmesg_selinux(8)