Security-Enhanced Linux secures the mount processes via flexible mandatory access control.
If you want to allow the mount command to mount any directory or file, you must turn on the mount_anyfile boolean.
setsebool -P mount_anyfile 1
If you want to allow xguest users to mount removable media, you must turn on the xguest_mount_media boolean.
setsebool -P xguest_mount_media 1
If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd serve for the mount_t, mount_ecryptfs_t, you must turn on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the mount_t, mount_ecryptfs_t, you must turn on the kerberos_enabled boolean.
setsebool -P kerberos_enabled 1
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 mount policy is very flexible allowing users to setup their mount processes in as secure a method as possible.
The following file types are defined for mount:
mount_ecryptfs_exec_t
- Set files with the mount_ecryptfs_exec_t type, if you want to transition an executable to the mount_ecryptfs_t domain.
mount_ecryptfs_tmpfs_t
- Set files with the mount_ecryptfs_tmpfs_t type, if you want to store mount ecryptfs files on a tmpfs file system.
mount_exec_t
- Set files with the mount_exec_t type, if you want to transition an executable to the mount_t domain.
mount_loopback_t
- Set files with the mount_loopback_t type, if you want to treat the files as mount loopback data.
mount_tmp_t
- Set files with the mount_tmp_t type, if you want to store mount temporary files in the /tmp directories.
mount_var_run_t
- Set files with the mount_var_run_t type, if you want to store the mount files under the /run directory.
Note: File context can be temporarily modified with the chcon command. If you want to permanently 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.
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux mount policy is very flexible allowing users to setup their mount processes in as secure a method as possible.
The following process types are defined for mount:
mount_t, mount_ecryptfs_t
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.
The SELinux user type mount_t can manage files labeled with the following file types. The paths listed are the de