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Description of problem:
x-systemd.automount entry in /etc/fstab stopped working after update from 7.4 to 7.5 in case when mount point does.nt exist.

Version-Release number of selected component (if applicable):
systemd-219-57

How reproducible:
Always

Steps to Reproduce:
# echo tmpfs /mnt/auto.test tmpfs defaults,noauto,x-systemd.automount 0 0 >> /etc/fstab
# systemctl daemon-reload
# rm -rf /mnt/auto.test
# systemctl start mnt-auto.test.automount
Job for mnt-auto.test.automount failed. See "systemctl status mnt-auto.test.automount" and "journalctl -xe" for details.
# systemctl status mnt-auto.test.automount
● mnt-auto.test.automount
   Loaded: loaded (/etc/fstab; bad; vendor preset: disabled)
   Active: inactive (dead)
    Where: /mnt/auto.test
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)

May 29 13:06:03 vm systemd[1]: Path /mnt/auto.test is already a mount point, refusing start for mnt-auto.test.automount
May 29 13:06:03 vm systemd[1]: Failed to set up automount mnt-auto.test.automount.

Actual results:
mnt-auto.test.automount unit is in failed state.

Expected results:
mnt-auto.test.automount is active.

Additional info:

Worked fine in 7.4, seems to become broken in systemd from 7.5.

Rough bisection discovered that everything works fine again with the following patches disabled in systemd:

#Patch0546: 0546-path-util-make-use-of-mnt_id-field-exported-in-proc-.patch
#Patch0549: 0549-test-path-util-force-rm_rf.patch
#Patch0551: 0551-mount-make-sure-we-unmount-tmpfs-mounts-before-we-de.patch
#Patch0561: 0561-automount-if-an-automount-unit-is-masked-don-t-react.patch
#Patch0601: 0601-automount-ack-automount-requests-even-when-already-m.patch
#Patch0609: 0609-core-don-t-choke-if-a-unit-another-unit-triggers-van.patch

(likely this is a bit overkill, at least the problem still exists if we disable only 601 and 609).

I can confirm this is broken in 7.5 also. all my automounts nolonger work.

fixed by https://github.com/systemd/systemd/commit/b604cb9bf6a14d12589e85b82f3f59db93ea0029

fix merged to staging branch -> https://github.com/lnykryn/systemd-rhel/pull/260 -> post

PR: https://github.com/systemd-rhel/rhel-7/pull/26

fix merged to github master branch -> https://github.com/systemd-rhel/rhel-7/pull/26 -> 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-2020:1117