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Description of problem:
Running 'systemctl isolate' on any target disconnects any active sessions, including sending signal 15 to ssh sessions from other users.
Version-Release number of selected component (if applicable):
In RHEL 7.6 + RHEL 7.7
systemd.x86_64 0:219-67.el7_7.1
systemd-sysv.x86_64 0:219-67.el7_7.1
systemd-libs.x86_64 0:219-67.el7_7.1
libgudev1.x86_64 0:219-67.el7_7.1
In RHEL 7.7 you must also downgrade:
systemd-python.x86_64 0:219-67.el7_7.1
How reproducible:
Consistently
Steps to Reproduce:
In a fresh RHEL 7.6 VM:
1) run # yum update
2) create test accounts.
3) login to all sessions and a root session via ssh in multiple terminals
4) In the root terminal run # systemctl isolate multi-user.target
5) Watch everyone get disconnected.
Actual results:
Test session 1:
$ ssh test1.122.4
test1.122.4's password:
After issuing isolate on root session:
[test1@localhost ~]$ Connection to 192.168.122.4 closed by remote host.
Connection to 192.168.122.4 closed.
Test session 2:
$ ssh test2.122.4
test2.122.4's password:
After issuing isolate on root session:
[test2@localhost ~]$ Connection to 192.168.122.4 closed by remote host.
Connection to 192.168.122.4 closed.
Root Session:
$ ssh root.122.4
root.122.4's password:
Last login: Fri Aug 23 16:52:31 2019 from gateway
[root@localhost ~]# systemctl isolate multi-user.target
Connection to 192.168.122.4 closed by remote host.
Connection to 192.168.122.4 closed.
Expected results:
[root@localhost ~]# systemctl isolate multi-user.target
[root@localhost ~]#
(no session disconnects)
Additional info:
Running the following to downgrade packages resolves the issue as a workaround:
RHEL 7.6:
# yum downgrade systemd systemd-sysv systemd-libs libgudev1
RHEL 7.7:
# yum downgrade systemd systemd-sysv systemd-libs libgudev1 systemd-python
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