1kdump_selinux(8) SELinux Policy kdump kdump_selinux(8)
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6 kdump_selinux - Security Enhanced Linux Policy for the kdump processes
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9 Security-Enhanced Linux secures the kdump processes via flexible manda‐
10 tory access control.
11 The kdump processes execute with the kdump_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 kdump_t
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23 The kdump_t SELinux type can be entered via the kdump_exec_t file type.
24 The default entrypoint paths for the kdump_t domain are the following:
26 /sbin/kdump, /sbin/kexec
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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 kdump policy is very flexible allowing users to setup their kdump pro‐
37 cesses in as secure a method as possible.
38 The following process types are defined for kdump:
40 kdumpgui_t, kdump_t
42 Note: semanage permissive -a kdump_t can be used to make the process
44 type kdump_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. kdump
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run kdump 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 kdump_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 initrc_tmp_t
106 mnt_t
109 /mnt(/[^/]*)
111 /mnt(/[^/]*)?
112 /rhev(/[^/]*)?
113 /media(/[^/]*)
114 /media(/[^/]*)?
115 /etc/rhgb(/.*)?
116 /media/.hal-.*
117 /net
118 /afs
119 /rhev
120 /misc
121 tmp_t
123 /tmp
125 /usr/tmp
126 /var/tmp
127 /tmp-inst
128 /var/tmp-inst
129 /var/tmp/vi.recover
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133 SELinux requires files to have an extended attribute to define the file
134 type.
135 You can see the context of a file using the -Z option to ls
137 Policy governs the access confined processes have to these files.
139 SELinux kdump policy is very flexible allowing users to setup their
140 kdump processes in as secure a method as possible.
141 STANDARD FILE CONTEXT
143 SELinux defines the file context types for the kdump, if you wanted to
145 store files with these types in a diffent paths, you need to execute
146 the semanage command to sepecify alternate labeling and then use
147 restorecon to put the labels on disk.
148 semanage fcontext -a -t kdumpgui_tmp_t '/srv/mykdump_content(/.*)?'
150 restorecon -R -v /srv/mykdump_content
151 Note: SELinux often uses regular expressions to specify labels that
153 match multiple files.
154 The following file types are defined for kdump:
156 kdump_etc_t
160 - Set files with the kdump_etc_t type, if you want to store kdump files
162 in the /etc directories.
163 kdump_exec_t
167 - Set files with the kdump_exec_t type, if you want to transition an
169 executable to the kdump_t domain.
170 Paths:
173 /sbin/kdump, /sbin/kexec
174 kdump_initrc_exec_t
177 - Set files with the kdump_initrc_exec_t type, if you want to transi‐
179 tion an executable to the kdump_initrc_t domain.
180 kdumpgui_exec_t
184 - Set files with the kdumpgui_exec_t type, if you want to transition an
186 executable to the kdumpgui_t domain.
187 kdumpgui_tmp_t
191 - Set files with the kdumpgui_tmp_t type, if you want to store kdumpgui
193 temporary files in the /tmp directories.
194 Note: File context can be temporarily modified with the chcon command.
198 If you want to permanently change the file context you need to use the
199 semanage fcontext command. This will modify the SELinux labeling data‐
200 base. You will need to use restorecon to apply the labels.
201
204 semanage fcontext can also be used to manipulate default file context
205 mappings.
206 semanage permissive can also be used to manipulate whether or not a
208 process type is permissive.
209 semanage module can also be used to enable/disable/install/remove pol‐
211 icy modules.
212 semanage boolean can also be used to manipulate the booleans
214 system-config-selinux is a GUI tool available to customize SELinux pol‐
217 icy settings.
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221 This manual page was auto-generated using sepolicy manpage .
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225 selinux(8), kdump(8), semanage(8), restorecon(8), chcon(1) , setse‐
226 bool(8)
227kdump 15-06-03 kdump_selinux(8)