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Description of problem:

(originally reported on the CentOS bug tracker and someone suggested that I should report here instead)

/sys/fs/cgroup is currently assigned the incorrect SELinux label of

system_u:object_r:tmpfs_t:s0

but restorecon reports that it should be

system_u:object_r:cgroup_t:s0

restorecon is unable to fix the issue as it returns an error: Read-only file system


Version-Release number of selected component (if applicable):

CentOS 7.2.1511

selinux-policy 3.13.1 (release 60.el7_2.3, Based off of reference policy: Checked out revision  2.20091117)


How reproducible:

always


Steps to Reproduce:

1. run ls -aZ /sys/fs/cgroup to verify directory has label of system_u:object_r:tmpfs_t:s0

2. run sudo restorecon -v /sys/fs/cgroup to correct the label


Actual results:

You will see the following error message:

restorecon set context /sys/fs/cgroup->system_u:object_r:cgroup_t:s0 failed:'Read-only file system'


Expected results:

restorecon should have have corrected the label of /sys/fs/cgroup to system_u:object_r:cgroup_t


Additional info:

You can confirm the correct label here:

https://github.com/TresysTechnology/refpolicy/blob/778dfaf776800887d1f9c320a7ac6199139b694b/policy/modules/kernel/filesystem.fc#L14 [^]

I cannot remember. But I don't think so.

This should be fixed in systemd code. 

Michal, 
Could you add labeling for /sys/fs/cgroup dir cgroup_t ? 

Thanks.

any news about this issue?

https://github.com/lnykryn/systemd-rhel/pull/207

fix merged to staging branch -> https://github.com/lnykryn/systemd-rhel/pull/207 -> post

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:3245