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.

Created attachment 920458 [details]
Traceback and Memory map from /var/log/messages

Description of problem:
If SELinux is disabled, nmtui crashes, when you try to set/change the hostname.



Version-Release number of selected component (if applicable):
* NetworkManager-0.9.9.1-25.git20140326.4dba720



How reproducible:
* Always



Steps to Reproduce:
1. Disable SELinux in /etc/sysconfig/selinux
2. Reboot
3. Check with "sestatus", that it's really disabled
4. Run "nmtui"
5. Choose "Set system hostname"
6. Type in a hostname, like "xxx.yyy" and hit OK



Actual results:
* Application freezes.
* NetworkManager process crashes (/var/log/messages): *** Error in `/usr/sbin/NetworkManager': free(): invalid pointer: 0x00007fa24ae35240 ***



Expected results:
* Hostname should be set and application should return back to prompt.



Additional info:
* If you re-enable SELinux in /etc/sysconfig/selinux and reboot, setting the hostname in nmtui is possible again.
* I discovered this problem in CentOS7, but I think it's a bug directly in RHEL7.

Thanks for the report. I can reproduce the crash on latest RHEL7.

The problem is not in nmtui, but in NM ifcfg-rh plugin. When SELinux is disabled SELinux, getfscreatecon() fails and we tried to free uninitialized context later.

Testcase:
1) Enable ifcfg-rh plugin in /etc/NetworkManger/NetworkManger.conf
   plugins=ifcfg-rh
2) Edit /etc/sysconfig/selinux to contain
   SELINUX=disabled
3) Reboot
4) Set hostname via nmcli, nmtui or D-Bus SaveHostname() call
   nmcli gen hostname this-is-my-pc
5) NM crashes

Created attachment 920529 [details]
[PATCH] Patch fixing the crash

This patch fixes the crash in ifcfg-rh.

yeah, looks right

Committed upstream:
93f7fa9 ifcfg-rh: fix a crash on setting hostname with SELinux disabled (rh #1122826)

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://rhn.redhat.com/errata/RHBA-2015-0311.html