1fsadm_selinux(8) SELinux Policy fsadm fsadm_selinux(8)
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6 fsadm_selinux - Security Enhanced Linux Policy for the fsadm processes
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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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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/dump.exfat,
28 /sbin/tune.exfat, /sbin/swapon.*, /sbin/resize.*fs, /sbin/losetup.*,
29 /usr/sbin/fsck.*, /usr/sbin/jfs_.*, /usr/sbin/mkfs.*,
30 /usr/sbin/dump.exfat, /usr/sbin/tune.exfat, /sbin/reiserfs(ck|tune),
31 /usr/sbin/swapon.*, /usr/sbin/resize.*fs, /usr/sbin/losetup.*,
32 /usr/sbin/reiserfs(ck|tune), /sbin/dump, /sbin/blkid, /sbin/fdisk,
33 /sbin/partx, /sbin/cfdisk, /sbin/e2fsck, /sbin/e4fsck, /sbin/findfs,
34 /sbin/hdparm, /sbin/lsraid, /sbin/mke2fs, /sbin/mke4fs, /sbin/mkraid,
35 /sbin/parted, /sbin/sfdisk, /usr/bin/raw, /sbin/dosfsck, /sbin/e2label,
36 /sbin/mkdosfs, /sbin/swapoff, /sbin/tune2fs, /sbin/blockdev,
37 /sbin/dumpe2fs, /usr/sbin/dump, /sbin/partprobe, /sbin/raidstart,
38 /sbin/scsi_info, /usr/sbin/blkid, /usr/sbin/fdisk, /usr/sbin/partx,
39 /sbin/exfatlabel, /sbin/mkreiserfs, /sbin/xfs_growfs, /usr/sbin/cfdisk,
40 /usr/sbin/e2fsck, /usr/sbin/e4fsck, /usr/sbin/findfs, /usr/sbin/hdparm,
41 /usr/sbin/lsraid, /usr/sbin/mke2fs, /usr/sbin/mke4fs, /usr/sbin/mkraid,
42 /usr/sbin/parted, /usr/sbin/sfdisk, /sbin/e2mmpstatus, /sbin/install-
43 mbr, /sbin/raidautorun, /usr/bin/syslinux, /usr/sbin/dosfsck,
44 /usr/sbin/e2label, /usr/sbin/mkdosfs, /usr/sbin/swapoff,
45 /usr/sbin/tune2fs, /sbin/make_reiser4, /usr/sbin/blockdev,
46 /usr/sbin/dumpe2fs, /usr/sbin/smartctl, /usr/sbin/partprobe,
47 /usr/sbin/raidstart, /usr/sbin/scsi_info, /usr/sbin/exfatlabel,
48 /usr/sbin/mkreiserfs, /usr/sbin/xfs_growfs, /usr/sbin/clubufflush,
49 /usr/sbin/e2mmpstatus, /usr/sbin/install-mbr, /usr/sbin/raidautorun,
50 /usr/sbin/make_reiser4, /usr/bin/partition_uuid,
51 /usr/bin/scsi_unique_id, /usr/lib/systemd/systemd-fsck, /usr/lib/sys‐
52 temd/systemd-growfs, /usr/lib/systemd/systemd-makefs
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55 SELinux defines process types (domains) for each process running on the
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58 You can see the context of a process using the -Z option to ps
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60 Policy governs the access confined processes have to files. SELinux
61 fsadm policy is very flexible allowing users to setup their fsadm pro‐
62 cesses in as secure a method as possible.
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64 The following process types are defined for fsadm:
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66 fsadm_t
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68 Note: semanage permissive -a fsadm_t can be used to make the process
69 type fsadm_t permissive. SELinux does not deny access to permissive
70 process types, but the AVC (SELinux denials) messages are still gener‐
71 ated.
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75 SELinux policy is customizable based on least access required. fsadm
76 policy is extremely flexible and has several booleans that allow you to
77 manipulate the policy and run fsadm with the tightest access possible.
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81 If you want to deny user domains applications to map a memory region as
82 both executable and writable, this is dangerous and the executable
83 should be reported in bugzilla, you must turn on the deny_execmem bool‐
84 ean. Enabled by default.
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86 setsebool -P deny_execmem 1
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90 If you want to control the ability to mmap a low area of the address
91 space, as configured by /proc/sys/vm/mmap_min_addr, you must turn on
92 the mmap_low_allowed boolean. Disabled by default.
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94 setsebool -P mmap_low_allowed 1
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98 If you want to disable kernel module loading, you must turn on the se‐
99 cure_mode_insmod boolean. Enabled by default.
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101 setsebool -P secure_mode_insmod 1
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105 If you want to allow unconfined executables to make their heap memory
106 executable. Doing this is a really bad idea. Probably indicates a
107 badly coded executable, but could indicate an attack. This executable
108 should be reported in bugzilla, you must turn on the selinuxuser_ex‐
109 echeap boolean. Disabled by default.
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111 setsebool -P selinuxuser_execheap 1
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115 If you want to allow unconfined executables to make their stack exe‐
116 cutable. This should never, ever be necessary. Probably indicates a
117 badly coded executable, but could indicate an attack. This executable
118 should be reported in bugzilla, you must turn on the selinuxuser_exec‐
119 stack boolean. Enabled by default.
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121 setsebool -P selinuxuser_execstack 1
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126 The SELinux process type fsadm_t can manage files labeled with the fol‐
127 lowing file types. The paths listed are the default paths for these
128 file types. Note the processes UID still need to have DAC permissions.
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130 file_type
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132 all files on the system
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136 SELinux requires files to have an extended attribute to define the file
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139 You can see the context of a file using the -Z option to ls
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141 Policy governs the access confined processes have to these files.
142 SELinux fsadm policy is very flexible allowing users to setup their
143 fsadm processes in as secure a method as possible.
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145 STANDARD FILE CONTEXT
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147 SELinux defines the file context types for the fsadm, if you wanted to
148 store files with these types in a diffent paths, you need to execute
149 the semanage command to specify alternate labeling and then use re‐
150 storecon to put the labels on disk.
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152 semanage fcontext -a -t fsadm_tmpfs_t '/srv/myfsadm_content(/.*)?'
153 restorecon -R -v /srv/myfsadm_content
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155 Note: SELinux often uses regular expressions to specify labels that
156 match multiple files.
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158 The following file types are defined for fsadm:
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162 fsadm_exec_t
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164 - Set files with the fsadm_exec_t type, if you want to transition an
165 executable to the fsadm_t domain.
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168 Paths:
169 /sbin/fsck.*, /sbin/jfs_.*, /sbin/mkfs.*, /sbin/dump.exfat,
170 /sbin/tune.exfat, /sbin/swapon.*, /sbin/resize.*fs, /sbin/los‐
171 etup.*, /usr/sbin/fsck.*, /usr/sbin/jfs_.*, /usr/sbin/mkfs.*,
172 /usr/sbin/dump.exfat, /usr/sbin/tune.exfat, /sbin/reis‐
173 erfs(ck|tune), /usr/sbin/swapon.*, /usr/sbin/resize.*fs,
174 /usr/sbin/losetup.*, /usr/sbin/reiserfs(ck|tune), /sbin/dump,
175 /sbin/blkid, /sbin/fdisk, /sbin/partx, /sbin/cfdisk, /sbin/e2fsck,
176 /sbin/e4fsck, /sbin/findfs, /sbin/hdparm, /sbin/lsraid,
177 /sbin/mke2fs, /sbin/mke4fs, /sbin/mkraid, /sbin/parted,
178 /sbin/sfdisk, /usr/bin/raw, /sbin/dosfsck, /sbin/e2label,
179 /sbin/mkdosfs, /sbin/swapoff, /sbin/tune2fs, /sbin/blockdev,
180 /sbin/dumpe2fs, /usr/sbin/dump, /sbin/partprobe, /sbin/raidstart,
181 /sbin/scsi_info, /usr/sbin/blkid, /usr/sbin/fdisk,
182 /usr/sbin/partx, /sbin/exfatlabel, /sbin/mkreiserfs,
183 /sbin/xfs_growfs, /usr/sbin/cfdisk, /usr/sbin/e2fsck,
184 /usr/sbin/e4fsck, /usr/sbin/findfs, /usr/sbin/hdparm,
185 /usr/sbin/lsraid, /usr/sbin/mke2fs, /usr/sbin/mke4fs,
186 /usr/sbin/mkraid, /usr/sbin/parted, /usr/sbin/sfdisk, /sbin/e2mmp‐
187 status, /sbin/install-mbr, /sbin/raidautorun, /usr/bin/syslinux,
188 /usr/sbin/dosfsck, /usr/sbin/e2label, /usr/sbin/mkdosfs,
189 /usr/sbin/swapoff, /usr/sbin/tune2fs, /sbin/make_reiser4,
190 /usr/sbin/blockdev, /usr/sbin/dumpe2fs, /usr/sbin/smartctl,
191 /usr/sbin/partprobe, /usr/sbin/raidstart, /usr/sbin/scsi_info,
192 /usr/sbin/exfatlabel, /usr/sbin/mkreiserfs, /usr/sbin/xfs_growfs,
193 /usr/sbin/clubufflush, /usr/sbin/e2mmpstatus, /usr/sbin/install-
194 mbr, /usr/sbin/raidautorun, /usr/sbin/make_reiser4, /usr/bin/par‐
195 tition_uuid, /usr/bin/scsi_unique_id, /usr/lib/systemd/systemd-
196 fsck, /usr/lib/systemd/systemd-growfs, /usr/lib/systemd/systemd-
197 makefs
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200 fsadm_log_t
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202 - Set files with the fsadm_log_t type, if you want to treat the data as
203 fsadm log data, usually stored under the /var/log directory.
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207 fsadm_tmp_t
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209 - Set files with the fsadm_tmp_t type, if you want to store fsadm tem‐
210 porary files in the /tmp directories.
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214 fsadm_tmpfs_t
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216 - Set files with the fsadm_tmpfs_t type, if you want to store fsadm
217 files on a tmpfs file system.
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221 fsadm_var_run_t
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223 - Set files with the fsadm_var_run_t type, if you want to store the
224 fsadm files under the /run or /var/run directory.
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227 Paths:
228 /var/run/fsck(/.*)?, /var/run/blkid(/.*)?
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231 Note: File context can be temporarily modified with the chcon command.
232 If you want to permanently change the file context you need to use the
233 semanage fcontext command. This will modify the SELinux labeling data‐
234 base. You will need to use restorecon to apply the labels.
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238 semanage fcontext can also be used to manipulate default file context
239 mappings.
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241 semanage permissive can also be used to manipulate whether or not a
242 process type is permissive.
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244 semanage module can also be used to enable/disable/install/remove pol‐
245 icy modules.
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247 semanage boolean can also be used to manipulate the booleans
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250 system-config-selinux is a GUI tool available to customize SELinux pol‐
251 icy settings.
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255 This manual page was auto-generated using sepolicy manpage .
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259 selinux(8), fsadm(8), semanage(8), restorecon(8), chcon(1), sepol‐
260 icy(8), setsebool(8)
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264fsadm 23-02-03 fsadm_selinux(8)