chroot_user_selinux(8) SELinux Policy chroot_user chroot_user_selinux(8)NAMEchroot_user_selinux - Security Enhanced Linux Policy for the
Security-Enhanced Linux secures the chroot_user processes via flexible
mandatory access control.
The chroot_user processes execute with the chroot_user_t SELinux type.
You can check if you have these processes running by executing the ps
command with the -Z qualifier.
ps -eZ | grep chroot_user_t
SELinux defines process types (domains) for each process running on the
You can see the context of a process using the -Z option to ps
Policy governs the access confined processes have to files. SELinux
chroot_user policy is very flexible allowing users to setup their
chroot_user processes in as secure a method as possible.
The following process types are defined for chroot_user:
Note: semanage permissive -a chroot_user_t can be used to make the
process type chroot_user_t permissive. SELinux does not deny access to
permissive process types, but the AVC (SELinux denials) messages are
SELinux policy is customizable based on least access required.
chroot_user policy is extremely flexible and has several booleans that
allow you to manipulate the policy and run chroot_user with the tight‐
est access possible.
If you want to deny any process from ptracing or debugging any other
processes, you must turn on the deny_ptrace boolean. Enabled by
setsebool -P deny_ptrace 1
If you want to allow all domains to use other domains file descriptors,
you must turn on the domain_fd_use boolean. Enabled by default.
setsebool -P domain_fd_use 1
If you want to allow all domains to have the kernel load modules, you
must turn on the domain_kernel_load_modules boolean. Disabled by
setsebool -P domain_kernel_load_modules 1
If you want to allow all domains to execute in fips_mode, you must turn
on the fips_mode boolean. Enabled by default.
setsebool -P fips_mode 1
If you want to enable reading of urandom for all domains, you must turn
on the global_ssp boolean. Disabled by default.
setsebool -P global_ssp 1
If you want to allow ssh with chroot env to read and write files in the
user home directories, you must turn on the ssh_chroot_rw_homedirs
boolean. Disabled by default.
setsebool -P ssh_chroot_rw_homedirs 1
If you want to support ecryptfs home directories, you must turn on the
use_ecryptfs_home_dirs boolean. Disabled by default.
setsebool -P use_ecryptfs_home_dirs 1
If you want to support fusefs home directories, you must turn on the
use_fusefs_home_dirs boolean. Disabled by default.
setsebool -P use_fusefs_home_dirs 1
If you want to support NFS home directories, you must turn on the
use_nfs_home_dirs boolean. Disabled by default.
setsebool -P use_nfs_home_dirs 1
If you want to support SAMBA home directories, you must turn on the
use_samba_home_dirs boolean. Disabled by default.
setsebool -P use_samba_home_dirs 1
The SELinux process type chroot_user_t can manage files labeled with
the following file types. The paths listed are the default paths for
these file types. Note the processes UID still need to have DAC per‐
semanage fcontext can also be used to manipulate default file context
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 pol‐
semanage boolean can also be used to manipulate the booleans
system-config-selinux is a GUI tool available to customize SELinux pol‐
This manual page was auto-generated using sepolicy manpage .
SEE ALSOselinux(8), chroot_user(8), semanage(8), restorecon(8), chcon(1),
sepolicy(8) , setsebool(8)chroot_user 14-05-08 chroot_user_selinux(8)