load_selinux (8) - Linux Man Pages
load_selinux: Security Enhanced Linux Policy for the load processes
NAMEload_selinux - Security Enhanced Linux Policy for the load processes
Security-Enhanced Linux secures the load processes via flexible mandatory access control.
BOOLEANSSELinux policy is customizable based on least access required. load policy is extremely flexible and has several booleans that allow you to manipulate the policy and run load with the tightest access possible.
If you want to prevent all confined domains from loading policy, setting enforcing mode, and changing boolean values. Set this to true and you have to reboot to set it bac, you must turn on the secure_mode_policyload boolean.
setsebool -P secure_mode_policyload 1
If you want to allow the graphical login program to execute bootloade, you must turn on the xdm_exec_bootloader boolean.
setsebool -P xdm_exec_bootloader 1
If you want to allow all domains to have the kernel load module, you must turn on the domain_kernel_load_modules boolean.
setsebool -P domain_kernel_load_modules 1
FILE CONTEXTSSELinux requires files to have an extended attribute to define the file type.
You can see the context of a file using the -Z option to lsP Policy governs the access confined processes have to these files. SELinux load policy is very flexible allowing users to setup their load processes in as secure a method as possible.
The following file types are defined for load:
- Set files with the load_policy_exec_t type, if you want to transition an executable to the load_policy_t domain.
- Set files with the loadkeys_exec_t type, if you want to transition an executable to the loadkeys_t domain.
/bin/unikeys, /bin/loadkeys, /usr/bin/unikeys, /usr/bin/loadkeys
Note: File context can be temporarily modified with the chcon command. If you want to permanantly change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels.
PROCESS TYPESSELinux defines process types (domains) for each process running on the system
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux load policy is very flexible allowing users to setup their load processes in as secure a method as possible.
The following process types are defined for load:
Note: semanage permissive -a PROCESS_TYPE can be used to make a process type permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.
COMMANDSsemanage fcontext can also be used to manipulate default file context mappings.
semanage permissive can also be used to manipulate whether or not a process type is permissive.
semanage module can also be used to enable/disable/install/remove policy modules.
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux policy settings.