Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
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.
Description of problem:
The current version of DBUS in rhel-7.3 uses constants from selinux/flask.h. This is a deprecated method and it doesn't work correctly with the rebased SELinux userspace in RHEL-7.3. DBUS generates audit messages with untranslated classes and permissions like:
type=USER_AVC msg=audit(08/04/2016 10:24:46.713:367) : pid=549 uid=dbus auid=unset ses=unset subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { 0x2 } for msgtype=method_return dest=:1.95 spid=699 tpid=18677 scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:system_r:puppetagent_t:s0 tclass=(null) exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?'
To ensure that classes and permissions are translated correctly, bus/selinux.c should use selinux_set_mapping() instead of constants from selinux/flask.h as it's already fixed upstream in
https://cgit.freedesktop.org/dbus/dbus/commit/bus/selinux.c?id=ba088208bc0c35ca418a097a8482c4a7705f4a43
Since the upstream doesn't use dbus-1.6.12-mls-listnames.patch, this patch needs to be changed as well.
Steps to Reproduce:
1. run 'service ModemManager restart'
2. check /var/log/audit/audit.log or use 'ausearch -m user_avc -ts recent'
Actual results:
type=USER_AVC msg=audit(1470403659.361:109): pid=451 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { 0x2 } for msgtype=method_call interface=org.freedesktop.login1.Manager member=Inhibit dest=:1.1 spid=921 tpid=450 scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:systemd_logind_t:s0 tclass=(null) exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'
Expected results:
type=USER_AVC msg=audit(1470403659.361:109): pid=451 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=org.freedesktop.login1.Manager member=Inhibit dest=:1.1 spid=921 tpid=450 scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:systemd_logind_t:s0 tclass=dbus exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'
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-2016-2453.html
Description of problem: The current version of DBUS in rhel-7.3 uses constants from selinux/flask.h. This is a deprecated method and it doesn't work correctly with the rebased SELinux userspace in RHEL-7.3. DBUS generates audit messages with untranslated classes and permissions like: type=USER_AVC msg=audit(08/04/2016 10:24:46.713:367) : pid=549 uid=dbus auid=unset ses=unset subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { 0x2 } for msgtype=method_return dest=:1.95 spid=699 tpid=18677 scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:system_r:puppetagent_t:s0 tclass=(null) exe=/usr/bin/dbus-daemon sauid=dbus hostname=? addr=? terminal=?' To ensure that classes and permissions are translated correctly, bus/selinux.c should use selinux_set_mapping() instead of constants from selinux/flask.h as it's already fixed upstream in https://cgit.freedesktop.org/dbus/dbus/commit/bus/selinux.c?id=ba088208bc0c35ca418a097a8482c4a7705f4a43 Since the upstream doesn't use dbus-1.6.12-mls-listnames.patch, this patch needs to be changed as well. Steps to Reproduce: 1. run 'service ModemManager restart' 2. check /var/log/audit/audit.log or use 'ausearch -m user_avc -ts recent' Actual results: type=USER_AVC msg=audit(1470403659.361:109): pid=451 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { 0x2 } for msgtype=method_call interface=org.freedesktop.login1.Manager member=Inhibit dest=:1.1 spid=921 tpid=450 scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:systemd_logind_t:s0 tclass=(null) exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?' Expected results: type=USER_AVC msg=audit(1470403659.361:109): pid=451 uid=81 auid=4294967295 ses=4294967295 subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 msg='avc: denied { send_msg } for msgtype=method_call interface=org.freedesktop.login1.Manager member=Inhibit dest=:1.1 spid=921 tpid=450 scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:systemd_logind_t:s0 tclass=dbus exe="/usr/bin/dbus-daemon" sauid=81 hostname=? addr=? terminal=?'