RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Description of problem: I stumbled across the proc mount option 'hidepid' and realized that hidepid=1 is something I should run on my shared server.  While it doesn't take the place of my other system security, it feels like the right call.

It seems with RHEL7 that systemd is mounting /proc for me.  However, I can't seem to find the approprate unit file to add overrides.


Version-Release number of selected component (if applicable):systemd-207-8.el7.x86_64


How reproducible:100%


Steps to Reproduce:
1.seek to change mount options of /proc/
2.not listed in /etc/fstab
3.not listed in systemctl list-uints

Actual results:
no clear way to change mount options of /proc/

Expected results:
a clear way to change the mount options of /proc/

Additional info:

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

afaik proc mount options can't be really altered without patching src/core/mount-setup.c. However nothing prevents you from adding explicit entry to fstab, e.g.

proc   /proc    proc   defaults,hidepid=1   0   0

systemd will initially mount /proc with options which are hard-coded. But during boot-up service systemd-remount-fs.service is invoked which goes through /etc/fstab and remount *all* API file-systems (proc included of course) with desired options which might have not been applied by systemd at first. Hence adding above entry to fstab is preferred solution for this issue.