1fwupd_selinux(8)             SELinux Policy fwupd             fwupd_selinux(8)
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NAME

6       fwupd_selinux - Security Enhanced Linux Policy for the fwupd processes
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DESCRIPTION

9       Security-Enhanced Linux secures the fwupd processes via flexible manda‐
10       tory access control.
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12       The fwupd processes execute with the  fwupd_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 fwupd_t
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ENTRYPOINTS

23       The fwupd_t SELinux type can be entered via the fwupd_exec_t file type.
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25       The default entrypoint paths for the fwupd_t domain are the following:
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27       /usr/libexec/fwupd/fwupd
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PROCESS TYPES

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       fwupd policy is very flexible allowing users to setup their fwupd  pro‐
37       cesses in as secure a method as possible.
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39       The following process types are defined for fwupd:
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41       fwupd_t
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43       Note:  semanage  permissive  -a fwupd_t can be used to make the process
44       type fwupd_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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48

BOOLEANS

50       SELinux policy is customizable based on least access  required.   fwupd
51       policy is extremely flexible and has several booleans that allow you to
52       manipulate the policy and run fwupd with the tightest access possible.
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56       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.
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61       setsebool -P deny_execmem 1
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65       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.
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69       setsebool -P mmap_low_allowed 1
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73       If  you want to disable kernel module loading, you must turn on the se‐
74       cure_mode_insmod boolean. Enabled by default.
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76       setsebool -P secure_mode_insmod 1
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79
80       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.
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86       setsebool -P selinuxuser_execheap 1
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89
90       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.
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96       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

101       The SELinux process type fwupd_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.
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105       file_type
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107            all files on the system
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109

FILE CONTEXTS

111       SELinux requires files to have an extended attribute to define the file
112       type.
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114       You can see the context of a file using the -Z option to ls
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116       Policy  governs  the  access  confined  processes  have to these files.
117       SELinux fwupd policy is very flexible allowing  users  to  setup  their
118       fwupd processes in as secure a method as possible.
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120       STANDARD FILE CONTEXT
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122       SELinux  defines the file context types for the fwupd, 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.
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127       semanage fcontext -a -t fwupd_unit_file_t '/srv/myfwupd_content(/.*)?'
128       restorecon -R -v /srv/myfwupd_content
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130       Note: SELinux often uses regular expressions  to  specify  labels  that
131       match multiple files.
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133       The following file types are defined for fwupd:
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137       fwupd_cache_t
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139       - Set files with the fwupd_cache_t type, if you want to store the files
140       under the /var/cache directory.
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143       Paths:
144            /var/cache/fwupd(/.*)?, /var/cache/app-info(/.*)?
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146
147       fwupd_cert_t
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149       - Set files with the fwupd_cert_t type, if you want to treat the  files
150       as fwupd certificate data.
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154       fwupd_exec_t
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156       -  Set  files  with the fwupd_exec_t type, if you want to transition an
157       executable to the fwupd_t domain.
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161       fwupd_unit_file_t
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163       - Set files with the fwupd_unit_file_t type, if you want to  treat  the
164       files as fwupd unit content.
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167       Paths:
168            /usr/lib/systemd/system/fwupd.*,    /usr/lib/systemd/system/fwupd-
169            offline-update.*
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172       fwupd_var_lib_t
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174       - Set files with the fwupd_var_lib_t type, if you  want  to  store  the
175       fwupd files under the /var/lib directory.
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179       Note:  File context can be temporarily modified with the chcon command.
180       If you want to permanently change the file context you need to use  the
181       semanage fcontext command.  This will modify the SELinux labeling data‐
182       base.  You will need to use restorecon to apply the labels.
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COMMANDS

186       semanage fcontext can also be used to manipulate default  file  context
187       mappings.
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189       semanage  permissive  can  also  be used to manipulate whether or not a
190       process type is permissive.
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192       semanage module can also be used to enable/disable/install/remove  pol‐
193       icy modules.
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195       semanage boolean can also be used to manipulate the booleans
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197
198       system-config-selinux is a GUI tool available to customize SELinux pol‐
199       icy settings.
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AUTHOR

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

207       selinux(8),  fwupd(8),  semanage(8),  restorecon(8),  chcon(1),  sepol‐
208       icy(8), setsebool(8)
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212fwupd                              21-11-19                   fwupd_selinux(8)
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