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Bug 1999102 - firewalld fails to insert nf_nat_ftp module
Summary: firewalld fails to insert nf_nat_ftp module
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: firewalld
Version: unspecified
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Eric Garver
QA Contact: Tomas Dolezal
URL:
Whiteboard:
Depends On: 1999152
Blocks: 2002783 2003008
TreeView+ depends on / blocked
 
Reported: 2021-08-30 12:19 UTC by Štěpán Němec
Modified: 2021-12-02 13:58 UTC (History)
7 users (show)

Fixed In Version: firewalld-1.0.0-3.el9_b
Doc Type: No Doc Update
Doc Text:
Clone Of:
: 1999152 2002783 2003008 (view as bug list)
Environment:
Last Closed: 2021-11-22 15:18:28 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1989641 1 medium CLOSED SELinux is blocking firewalld from dropping linux capabilities 2023-05-30 08:33:26 UTC
Red Hat Issue Tracker RHELPLAN-95585 0 None None None 2021-08-30 14:01:20 UTC

Description Štěpán Němec 2021-08-30 12:19:38 UTC 
Description of problem:
With default capabilities (NET_ADMIN, NET_RAW), firewalld
is unable to insert nf_nat_ftp module when activating the ftp service.

Version-Release number of selected component (if applicable):
firewalld-1.0.0-2.el9

How reproducible:
Always.

Steps to Reproduce:
1. start firewalld with --debug
2. firewall-cmd --add-service ftp
3. /var/log/firewalld contains "modprobe: ERROR: could not insert 'nf_nat_ftp': Operation not permitted"

Actual results:
[root@ci-vm-10-0-137-226 ~]# rpm -q selinux-policy firewalld
selinux-policy-34.1.14-1.el9.noarch
firewalld-1.0.0-2.el9.noarch
[root@ci-vm-10-0-137-226 ~]# sed -i -e 's/^\(FIREWALLD_ARGS=\).*$/\1--debug/' /etc/sysconfig/firewalld
[root@ci-vm-10-0-137-226 ~]# cat /etc/sysconfig/firewalld
# firewalld command line args
# possible values: --debug
FIREWALLD_ARGS=--debug
[root@ci-vm-10-0-137-226 ~]# systemctl start firewalld
[root@ci-vm-10-0-137-226 ~]# firewall-cmd --add-service ftp
success
[root@ci-vm-10-0-137-226 ~]# grep ERROR /var/log/firewalld
2021-08-30 07:41:53 DEBUG1: modprobe: ERROR: could not insert 'nf_nat_ftp': Operation not permitted


Expected results:
The module insertion succeeds.

Additional info:
When firewalld runs with full capabilities the problem does not occur (the module is inserted successfully).
Comment 1 Eric Garver 2021-08-30 14:07:47 UTC 
So we do need CAP_SYS_MODULE in RHEL-9. I'm passing this to selinux-policy so they can update the firewalld policy.
Comment 2 Eric Garver 2021-08-30 14:13:12 UTC 
(In reply to Eric Garver from comment #1)
> So we do need CAP_SYS_MODULE in RHEL-9. I'm passing this to selinux-policy
> so they can update the firewalld policy.

My bad. We still nede the firewalld bug to backport:

  13801962073f ("fix(firewalld): keep linux capability CAP_SYS_MODULE")
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