Cross-filed case 02874310 at the Red Hat customer portal.

Meanwhile we're getting flooded by these messages from about every RHEL system after the latest updates - even there was no hiccup regarding the network connectivity:

grep subscription-manager /var/log/*dnf*:
/var/log/dnf.rpm.log:2021-02-22T08:43:11Z SUBDEBUG Upgrade: dnf-plugin-subscription-manager-1.27.18-1.el8_3.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:43:11Z SUBDEBUG Upgrade: subscription-manager-rhsm-certificates-1.27.18-1.el8_3.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:43:11Z SUBDEBUG Upgrade: python3-subscription-manager-rhsm-1.27.18-1.el8_3.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:43:11Z SUBDEBUG Upgrade: subscription-manager-1.27.18-1.el8_3.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:44:08Z SUBDEBUG Upgraded: subscription-manager-1.27.16-1.el8.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:44:08Z SUBDEBUG Upgraded: python3-subscription-manager-rhsm-1.27.16-1.el8.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:44:08Z SUBDEBUG Upgraded: subscription-manager-rhsm-certificates-1.27.16-1.el8.x86_64
/var/log/dnf.rpm.log:2021-02-22T08:44:08Z SUBDEBUG Upgraded: dnf-plugin-subscription-manager-1.27.16-1.el8.x86_64

/var/log/audit/audit.log:
type=AVC msg=audit(1613992383.227:110048): avc:  denied  { node_bind } for  pid=790844 comm="rhsmcertd-worke" saddr=::1 scontext=system_u:system_r:rhsmcertd_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=tcp_socket permissive=0

/var/log/rhsm/rhsmcertd.log:
Mon Feb 22 12:13:19 2021 [INFO] (Cert Check) Certificates updated.

/var/log/rhsm/rhsm.log:
2021-02-22 12:13:05,533 [INFO] rhsmcertd-worker:790844:MainThread @entcertlib.py:131 - certs updated:
Total updates: 0
Found (local) serial# [<removed>]
Expected (UEP) serial# [<removed>]
Added (new)
  <NONE>
Deleted (rogue):
  <NONE>
2021-02-22 12:13:10,725 [WARNING] rhsmcertd-worker:790844:MainThread @dmiinfo.py:130 - Error reading system DMI information: # SMBIOS implementations newer than version 2.7 are not
# fully supported by this version of dmidecode.

NoneType: None
2021-02-22 12:13:10,924 [WARNING] rhsmcertd-worker:790844:MainThread @dmiinfo.py:130 - Error reading system DMI information: # SMBIOS implementations newer than version 2.7 are not
# fully supported by this version of dmidecode.

NoneType: None
2021-02-22 12:13:12,471 [INFO] rhsmcertd-worker:790844:MainThread @factlib.py:100 - Facts have been updated.

Cross-filed case 02881290 at the Red Hat customer portal (other customer).

I can reproduce this issue on Fedora and RHEL8.

When I build and use rhsmcertd SELinux module from master branch at https://github.com/fedora-selinux/selinux-policy using:


[root@localhost contrib]# make -f /usr/share/selinux/devel/Makefile rhsmcertd.pp

[root@localhost contrib]# semodule -i rhsmcertd.pp 
libsemanage.semanage_direct_install_info: Overriding rhsmcertd module at lower priority 100 with module at priority 400.

[root@localhost contrib]# semodule -r rhsmcertd
libsemanage.semanage_direct_remove_key: rhsmcertd module at priority 100 is now active.


Then the SELinux issue is fixed. Not sure what exactly fixed this issue (probably this rule corenet_tcp_bind_generic_node(rhsmcertd_t) in following PR:

https://github.com/fedora-selinux/selinux-policy/pull/598


Master branch of selinux-policy cannot be applied to RHEL8. It will be necessary to backport this to RHEL8.


There is workaround for RHEL8:


Create fix_rhsmcertd.te with following content:

module foo 1.0;

require {
	type node_t;
	type rhsmcertd_t;
	class tcp_socket node_bind;
}

#============= rhsmcertd_t ==============

allow rhsmcertd_t node_t:tcp_socket node_bind;


[root@localhost]# make -f /usr/share/selinux/devel/Makefile fix_rhsmcertd.pp

[root@localhost]# semodule -i fix_rhsmcertd.pp

The permission has already been added to the policy and the fix should be a part of RHEL 8.4 GA.

*** This bug has been marked as a duplicate of bug 1923985 ***

*** Bug 1932158 has been marked as a duplicate of this bug. ***