fsadm_selinux(8)

1fsadm_selinux(8)             SELinux Policy fsadm             fsadm_selinux(8)
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NAME

6       fsadm_selinux - Security Enhanced Linux Policy for the fsadm processes
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DESCRIPTION

9       Security-Enhanced Linux secures the fsadm processes via flexible manda‐
10       tory access control.
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12       The fsadm processes execute with the  fsadm_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 fsadm_t
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ENTRYPOINTS

23       The fsadm_t SELinux type can be entered via the fsadm_exec_t file type.
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25       The default entrypoint paths for the fsadm_t domain are the following:
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27       /sbin/fsck.*,  /sbin/jfs_.*,  /sbin/mkfs.*,  /sbin/swapon.*,  /sbin/re‐
28       size.*fs,    /sbin/losetup.*,    /usr/sbin/fsck.*,    /usr/sbin/jfs_.*,
29       /usr/sbin/mkfs.*,     /sbin/reiserfs(ck|tune),      /usr/sbin/swapon.*,
30       /usr/sbin/resize.*fs, /usr/sbin/losetup.*, /usr/sbin/reiserfs(ck|tune),
31       /sbin/dump,  /sbin/blkid,   /sbin/fdisk,   /sbin/partx,   /sbin/cfdisk,
32       /sbin/e2fsck,  /sbin/e4fsck,  /sbin/findfs, /sbin/hdparm, /sbin/lsraid,
33       /sbin/mke2fs, /sbin/mke4fs, /sbin/mkraid,  /sbin/parted,  /sbin/sfdisk,
34       /usr/bin/raw,      /sbin/dosfsck,     /sbin/e2label,     /sbin/mkdosfs,
35       /sbin/swapoff,    /sbin/tune2fs,    /sbin/blockdev,     /sbin/dumpe2fs,
36       /usr/sbin/dump,   /sbin/partprobe,   /sbin/raidstart,  /sbin/scsi_info,
37       /usr/sbin/blkid,  /usr/sbin/fdisk,  /usr/sbin/partx,  /sbin/mkreiserfs,
38       /sbin/xfs_growfs, /usr/sbin/cfdisk, /usr/sbin/e2fsck, /usr/sbin/e4fsck,
39       /usr/sbin/findfs, /usr/sbin/hdparm, /usr/sbin/lsraid, /usr/sbin/mke2fs,
40       /usr/sbin/mke4fs, /usr/sbin/mkraid, /usr/sbin/parted, /usr/sbin/sfdisk,
41       /sbin/e2mmpstatus, /sbin/install-mbr, /sbin/raidautorun,  /usr/bin/sys‐
42       linux,    /usr/sbin/dosfsck,    /usr/sbin/e2label,   /usr/sbin/mkdosfs,
43       /usr/sbin/swapoff,        /usr/sbin/tune2fs,        /sbin/make_reiser4,
44       /usr/sbin/blockdev,       /usr/sbin/dumpe2fs,       /usr/sbin/smartctl,
45       /usr/sbin/partprobe,     /usr/sbin/raidstart,      /usr/sbin/scsi_info,
46       /usr/sbin/mkreiserfs,    /usr/sbin/xfs_growfs,   /usr/sbin/clubufflush,
47       /usr/sbin/e2mmpstatus,  /usr/sbin/install-mbr,   /usr/sbin/raidautorun,
48       /usr/sbin/make_reiser4,                        /usr/bin/partition_uuid,
49       /usr/bin/scsi_unique_id,  /usr/lib/systemd/systemd-fsck,  /usr/lib/sys‐
50       temd/systemd-growfs, /usr/lib/systemd/systemd-makefs
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PROCESS TYPES

53       SELinux defines process types (domains) for each process running on the
54       system
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56       You can see the context of a process using the -Z option to ps
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58       Policy governs the access confined processes have  to  files.   SELinux
59       fsadm  policy is very flexible allowing users to setup their fsadm pro‐
60       cesses in as secure a method as possible.
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62       The following process types are defined for fsadm:
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64       fsadm_t
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66       Note: semanage permissive -a fsadm_t can be used to  make  the  process
67       type  fsadm_t  permissive.  SELinux  does not deny access to permissive
68       process types, but the AVC (SELinux denials) messages are still  gener‐
69       ated.
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BOOLEANS

73       SELinux  policy  is customizable based on least access required.  fsadm
74       policy is extremely flexible and has several booleans that allow you to
75       manipulate the policy and run fsadm with the tightest access possible.
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79       If you want to deny user domains applications to map a memory region as
80       both executable and writable, this  is  dangerous  and  the  executable
81       should be reported in bugzilla, you must turn on the deny_execmem bool‐
82       ean. Enabled by default.
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84       setsebool -P deny_execmem 1
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88       If you want to control the ability to mmap a low area  of  the  address
89       space,  as  configured  by /proc/sys/vm/mmap_min_addr, you must turn on
90       the mmap_low_allowed boolean. Disabled by default.
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92       setsebool -P mmap_low_allowed 1
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96       If you want to disable kernel module loading, you must turn on the  se‐
97       cure_mode_insmod boolean. Enabled by default.
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99       setsebool -P secure_mode_insmod 1
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103       If  you  want to allow unconfined executables to make their heap memory
104       executable.  Doing this is a really  bad  idea.  Probably  indicates  a
105       badly  coded  executable, but could indicate an attack. This executable
106       should be reported in bugzilla, you must turn  on  the  selinuxuser_ex‐
107       echeap boolean. Disabled by default.
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109       setsebool -P selinuxuser_execheap 1
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113       If  you  want  to allow unconfined executables to make their stack exe‐
114       cutable.  This should never, ever be necessary.  Probably  indicates  a
115       badly  coded  executable, but could indicate an attack. This executable
116       should be reported in bugzilla, you must turn on the  selinuxuser_exec‐
117       stack boolean. Enabled by default.
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119       setsebool -P selinuxuser_execstack 1
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MANAGED FILES

124       The SELinux process type fsadm_t can manage files labeled with the fol‐
125       lowing file types.  The paths listed are the default  paths  for  these
126       file types.  Note the processes UID still need to have DAC permissions.
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128       file_type
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130            all files on the system
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FILE CONTEXTS

134       SELinux requires files to have an extended attribute to define the file
135       type.
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137       You can see the context of a file using the -Z option to ls
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139       Policy governs the access  confined  processes  have  to  these  files.
140       SELinux  fsadm  policy  is  very flexible allowing users to setup their
141       fsadm processes in as secure a method as possible.
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143       STANDARD FILE CONTEXT
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145       SELinux defines the file context types for the fsadm, if you wanted  to
146       store  files  with  these types in a diffent paths, you need to execute
147       the semanage command to specify alternate labeling  and  then  use  re‐
148       storecon to put the labels on disk.
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150       semanage fcontext -a -t fsadm_tmpfs_t '/srv/myfsadm_content(/.*)?'
151       restorecon -R -v /srv/myfsadm_content
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153       Note:  SELinux  often  uses  regular expressions to specify labels that
154       match multiple files.
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156       The following file types are defined for fsadm:
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160       fsadm_exec_t
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162       - Set files with the fsadm_exec_t type, if you want  to  transition  an
163       executable to the fsadm_t domain.
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166       Paths:
167            /sbin/fsck.*,    /sbin/jfs_.*,    /sbin/mkfs.*,    /sbin/swapon.*,
168            /sbin/resize.*fs,        /sbin/losetup.*,        /usr/sbin/fsck.*,
169            /usr/sbin/jfs_.*,    /usr/sbin/mkfs.*,    /sbin/reiserfs(ck|tune),
170            /usr/sbin/swapon.*,   /usr/sbin/resize.*fs,   /usr/sbin/losetup.*,
171            /usr/sbin/reiserfs(ck|tune), /sbin/dump, /sbin/blkid, /sbin/fdisk,
172            /sbin/partx,     /sbin/cfdisk,     /sbin/e2fsck,     /sbin/e4fsck,
173            /sbin/findfs,     /sbin/hdparm,     /sbin/lsraid,    /sbin/mke2fs,
174            /sbin/mke4fs,    /sbin/mkraid,     /sbin/parted,     /sbin/sfdisk,
175            /usr/bin/raw,    /sbin/dosfsck,    /sbin/e2label,   /sbin/mkdosfs,
176            /sbin/swapoff,  /sbin/tune2fs,   /sbin/blockdev,   /sbin/dumpe2fs,
177            /usr/sbin/dump, /sbin/partprobe, /sbin/raidstart, /sbin/scsi_info,
178            /usr/sbin/blkid, /usr/sbin/fdisk,  /usr/sbin/partx,  /sbin/mkreis‐
179            erfs,    /sbin/xfs_growfs,   /usr/sbin/cfdisk,   /usr/sbin/e2fsck,
180            /usr/sbin/e4fsck,       /usr/sbin/findfs,        /usr/sbin/hdparm,
181            /usr/sbin/lsraid,        /usr/sbin/mke2fs,       /usr/sbin/mke4fs,
182            /usr/sbin/mkraid, /usr/sbin/parted, /usr/sbin/sfdisk, /sbin/e2mmp‐
183            status,  /sbin/install-mbr,  /sbin/raidautorun, /usr/bin/syslinux,
184            /usr/sbin/dosfsck,      /usr/sbin/e2label,      /usr/sbin/mkdosfs,
185            /usr/sbin/swapoff,      /usr/sbin/tune2fs,     /sbin/make_reiser4,
186            /usr/sbin/blockdev,    /usr/sbin/dumpe2fs,     /usr/sbin/smartctl,
187            /usr/sbin/partprobe,   /usr/sbin/raidstart,   /usr/sbin/scsi_info,
188            /usr/sbin/mkreiserfs, /usr/sbin/xfs_growfs, /usr/sbin/clubufflush,
189            /usr/sbin/e2mmpstatus,   /usr/sbin/install-mbr,  /usr/sbin/raidau‐
190            torun,      /usr/sbin/make_reiser4,       /usr/bin/partition_uuid,
191            /usr/bin/scsi_unique_id,            /usr/lib/systemd/systemd-fsck,
192            /usr/lib/systemd/systemd-growfs, /usr/lib/systemd/systemd-makefs
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195       fsadm_log_t
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197       - Set files with the fsadm_log_t type, if you want to treat the data as
198       fsadm log data, usually stored under the /var/log directory.
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202       fsadm_tmp_t
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204       -  Set files with the fsadm_tmp_t type, if you want to store fsadm tem‐
205       porary files in the /tmp directories.
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209       fsadm_tmpfs_t
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211       - Set files with the fsadm_tmpfs_t type, if you  want  to  store  fsadm
212       files on a tmpfs file system.
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216       fsadm_var_run_t
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218       -  Set  files  with  the fsadm_var_run_t type, if you want to store the
219       fsadm files under the /run or /var/run directory.
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222       Paths:
223            /var/run/fsck(/.*)?, /var/run/blkid(/.*)?
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226       Note: File context can be temporarily modified with the chcon  command.
227       If  you want to permanently change the file context you need to use the
228       semanage fcontext command.  This will modify the SELinux labeling data‐
229       base.  You will need to use restorecon to apply the labels.
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COMMANDS

233       semanage  fcontext  can also be used to manipulate default file context
234       mappings.
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236       semanage permissive can also be used to manipulate  whether  or  not  a
237       process type is permissive.
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239       semanage  module can also be used to enable/disable/install/remove pol‐
240       icy modules.
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242       semanage boolean can also be used to manipulate the booleans
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245       system-config-selinux is a GUI tool available to customize SELinux pol‐
246       icy settings.
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AUTHOR

250       This manual page was auto-generated using sepolicy manpage .
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