1cachefiles_kernel_selinuSxE(L8i)nux Policy cachefiles_kecrancehlefiles_kernel_selinux(8)
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6 cachefiles_kernel_selinux - Security Enhanced Linux Policy for the
7 cachefiles_kernel processes
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10 Security-Enhanced Linux secures the cachefiles_kernel processes via
11 flexible mandatory access control.
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13 The cachefiles_kernel processes execute with the cachefiles_kernel_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 cachefiles_kernel_t
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24 SELinux defines process types (domains) for each process running on the
25 system
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27 You can see the context of a process using the -Z option to ps
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29 Policy governs the access confined processes have to files. SELinux
30 cachefiles_kernel policy is very flexible allowing users to setup their
31 cachefiles_kernel processes in as secure a method as possible.
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33 The following process types are defined for cachefiles_kernel:
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35 cachefiles_kernel_t
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37 Note: semanage permissive -a cachefiles_kernel_t can be used to make
38 the process type cachefiles_kernel_t permissive. SELinux does not deny
39 access to permissive process types, but the AVC (SELinux denials) mes‐
40 sages are still generated.
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44 SELinux policy is customizable based on least access required.
45 cachefiles_kernel policy is extremely flexible and has several booleans
46 that allow you to manipulate the policy and run cachefiles_kernel with
47 the tightest access possible.
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51 If you want to deny any process from ptracing or debugging any other
52 processes, you must turn on the deny_ptrace boolean. Enabled by
53 default.
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55 setsebool -P deny_ptrace 1
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59 If you want to allow any process to mmap any file on system with
60 attribute file_type, you must turn on the domain_can_mmap_files bool‐
61 ean. Enabled by default.
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63 setsebool -P domain_can_mmap_files 1
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67 If you want to allow all domains write to kmsg_device, while kernel is
68 executed with systemd.log_target=kmsg parameter, you must turn on the
69 domain_can_write_kmsg boolean. Disabled by default.
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71 setsebool -P domain_can_write_kmsg 1
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75 If you want to allow all domains to use other domains file descriptors,
76 you must turn on the domain_fd_use boolean. Enabled by default.
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78 setsebool -P domain_fd_use 1
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82 If you want to allow all domains to have the kernel load modules, you
83 must turn on the domain_kernel_load_modules boolean. Disabled by
84 default.
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86 setsebool -P domain_kernel_load_modules 1
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90 If you want to allow all domains to execute in fips_mode, you must turn
91 on the fips_mode boolean. Enabled by default.
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93 setsebool -P fips_mode 1
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97 If you want to enable reading of urandom for all domains, you must turn
98 on the global_ssp boolean. Disabled by default.
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100 setsebool -P global_ssp 1
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105 The SELinux process type cachefiles_kernel_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 cachefiles_var_t
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112 /var/fscache(/.*)?
113 /var/cache/fscache(/.*)?
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117 semanage fcontext can also be used to manipulate default file context
118 mappings.
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120 semanage permissive can also be used to manipulate whether or not a
121 process type is permissive.
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123 semanage module can also be used to enable/disable/install/remove pol‐
124 icy modules.
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126 semanage boolean can also be used to manipulate the booleans
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129 system-config-selinux is a GUI tool available to customize SELinux pol‐
130 icy settings.
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134 This manual page was auto-generated using sepolicy manpage .
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138 selinux(8), cachefiles_kernel(8), semanage(8), restorecon(8), chcon(1),
139 sepolicy(8) , setsebool(8)
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143cachefiles_kernel 19-04-25 cachefiles_kernel_selinux(8)