1systemd_coredump_selinux(S8E)Linux Policy systemd_coredsuymsptemd_coredump_selinux(8)
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NAME

6       systemd_coredump_selinux  - Security Enhanced Linux Policy for the sys‐
7       temd_coredump processes
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DESCRIPTION

10       Security-Enhanced Linux  secures  the  systemd_coredump  processes  via
11       flexible mandatory access control.
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13       The  systemd_coredump  processes  execute  with  the systemd_coredump_t
14       SELinux type. You can check if you have these processes running by exe‐
15       cuting the ps command with the -Z qualifier.
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17       For example:
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19       ps -eZ | grep systemd_coredump_t
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ENTRYPOINTS

24       The  systemd_coredump_t  SELinux  type  can  be  entered  via  the sys‐
25       temd_coredump_exec_t file type.
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27       The default entrypoint paths for the systemd_coredump_t domain are  the
28       following:
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30       /bin/systemd-coredump, /usr/lib/systemd/systemd-coredump
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PROCESS TYPES

33       SELinux defines process types (domains) for each process running on the
34       system
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36       You can see the context of a process using the -Z option to ps
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38       Policy governs the access confined processes have  to  files.   SELinux
39       systemd_coredump  policy is very flexible allowing users to setup their
40       systemd_coredump processes in as secure a method as possible.
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42       The following process types are defined for systemd_coredump:
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44       systemd_coredump_t
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46       Note: semanage permissive -a systemd_coredump_t can be used to make the
47       process  type  systemd_coredump_t  permissive.  SELinux  does  not deny
48       access to permissive process types, but the AVC (SELinux denials)  mes‐
49       sages are still generated.
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51

BOOLEANS

53       SELinux  policy  is  customizable based on least access required.  sys‐
54       temd_coredump policy is extremely flexible  and  has  several  booleans
55       that  allow  you to manipulate the policy and run systemd_coredump with
56       the tightest access possible.
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60       If you want to deny user domains applications to map a memory region as
61       both  executable  and  writable,  this  is dangerous and the executable
62       should be reported in bugzilla, you must turn on the deny_execmem bool‐
63       ean. Enabled by default.
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65       setsebool -P deny_execmem 1
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69       If  you  want  to control the ability to mmap a low area of the address
70       space, as configured by /proc/sys/vm/mmap_min_addr, you  must  turn  on
71       the mmap_low_allowed boolean. Disabled by default.
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73       setsebool -P mmap_low_allowed 1
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77       If  you  want  to  disable  kernel module loading, you must turn on the
78       secure_mode_insmod boolean. Enabled by default.
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80       setsebool -P secure_mode_insmod 1
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84       If you want to allow unconfined executables to make their  heap  memory
85       executable.   Doing  this  is  a  really bad idea. Probably indicates a
86       badly coded executable, but could indicate an attack.  This  executable
87       should   be   reported  in  bugzilla,  you  must  turn  on  the  selin‐
88       uxuser_execheap boolean. Disabled by default.
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90       setsebool -P selinuxuser_execheap 1
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94       If you want to allow unconfined executables to make  their  stack  exe‐
95       cutable.   This  should  never, ever be necessary. Probably indicates a
96       badly coded executable, but could indicate an attack.  This  executable
97       should  be reported in bugzilla, you must turn on the selinuxuser_exec‐
98       stack boolean. Disabled by default.
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100       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

105       The SELinux process type systemd_coredump_t can  manage  files  labeled
106       with  the following file types.  The paths listed are the default paths
107       for these file types.  Note the processes UID still need  to  have  DAC
108       permissions.
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110       file_type
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112            all files on the system
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FILE CONTEXTS

116       SELinux requires files to have an extended attribute to define the file
117       type.
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119       You can see the context of a file using the -Z option to ls
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121       Policy governs the access  confined  processes  have  to  these  files.
122       SELinux systemd_coredump policy is very flexible allowing users to set‐
123       up their systemd_coredump processes in as secure a method as possible.
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125       STANDARD FILE CONTEXT
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127       SELinux defines the file context types for the systemd_coredump, if you
128       wanted  to store files with these types in a diffent paths, you need to
129       execute the semanage command to sepecify alternate  labeling  and  then
130       use restorecon to put the labels on disk.
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132       semanage  fcontext -a -t systemd_coredump_tmpfs_t '/srv/mysystemd_core‐
133       dump_content(/.*)?'
134       restorecon -R -v /srv/mysystemd_coredump_content
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136       Note: SELinux often uses regular expressions  to  specify  labels  that
137       match multiple files.
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139       The following file types are defined for systemd_coredump:
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143       systemd_coredump_exec_t
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145       - Set files with the systemd_coredump_exec_t type, if you want to tran‐
146       sition an executable to the systemd_coredump_t domain.
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149       Paths:
150            /bin/systemd-coredump, /usr/lib/systemd/systemd-coredump
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153       systemd_coredump_tmpfs_t
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155       - Set files with the systemd_coredump_tmpfs_t  type,  if  you  want  to
156       store systemd coredump files on a tmpfs file system.
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160       Note:  File context can be temporarily modified with the chcon command.
161       If you want to permanently change the file context you need to use  the
162       semanage fcontext command.  This will modify the SELinux labeling data‐
163       base.  You will need to use restorecon to apply the labels.
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COMMANDS

167       semanage fcontext can also be used to manipulate default  file  context
168       mappings.
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170       semanage  permissive  can  also  be used to manipulate whether or not a
171       process type is permissive.
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173       semanage module can also be used to enable/disable/install/remove  pol‐
174       icy modules.
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176       semanage boolean can also be used to manipulate the booleans
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178
179       system-config-selinux is a GUI tool available to customize SELinux pol‐
180       icy settings.
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AUTHOR

184       This manual page was auto-generated using sepolicy manpage .
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SEE ALSO

188       selinux(8), systemd_coredump(8), semanage(8), restorecon(8),  chcon(1),
189       sepolicy(8), setsebool(8)
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193systemd_coredump                   21-03-26        systemd_coredump_selinux(8)
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