Bug 1579075

Summary: AVC: systemd-networkd and resolved unable to communicate over dbus
Product: [Fedora] Fedora Reporter: Scott Shambarger <scott-fedora>
Component: selinux-policyAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 28CC: dwalsh, lvrabec, mgrepl, plautrba, pmoore
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Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
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Fixed In Version: selinux-policy-3.14.2-22.fc29 selinux-policy-3.14.1-32.fc28 Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2018-06-09 20:41:48 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Scott Shambarger 2018-05-16 23:16:09 UTC
Description of problem:
Setting up a system with systemd-networkd for networking, I receive the following errors in the logs:

# journalctl -u systemd-networkd
...: Could not emit changed OperationalState: Transport endpoint is not connected
...: Not connected to system bus, not setting hostname.

The same services worked correctly in Fedora 27.

It's likely that systemd-hostnamed is also affected, although I don't have it configured on my system.

Version-Release number of selected component (if applicable):
systemd-238-8.git0e0aa59.fc28.x86_64
selinux-policy-3.14.1-24.fc28.noarch

Additional info:
----
time->Wed May 16 15:24:08 2018
type=PROCTITLE msg=audit(1526509448.216:82): proctitle="/usr/lib/systemd/systemd-networkd"
type=PATH msg=audit(1526509448.216:82): item=0 name="/run/dbus/system_bus_socket" inode=22634 dev=00:17 mode=0140666 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:system_dbusd_var_run_t:s0 nametype=NORMAL cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0 cap_fver=0
type=CWD msg=audit(1526509448.216:82): cwd="/"
type=SYSCALL msg=audit(1526509448.216:82): arch=c000003e syscall=254 success=no exit=-13 a0=f a1=555fce7fd110 a2=2000d84 a3=7562642f6e75722f items=1 ppid=1 pid=421 auid=4294967295 uid=192 gid=192 euid=192 suid=192 fsuid=192 egid=192 sgid=192 fsgid=192 tty=(none) ses=4294967295 comm="systemd-network" exe="/usr/lib/systemd/systemd-networkd" subj=system_u:system_r:systemd_networkd_t:s0 key=(null)
type=AVC msg=audit(1526509448.216:82): avc:  denied  { read } for  pid=421 comm="systemd-network" name="system_bus_socket" dev="tmpfs" ino=22634 scontext=system_u:system_r:systemd_networkd_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=0
----
time->Wed May 16 15:24:08 2018
type=PROCTITLE msg=audit(1526509448.223:83): proctitle="/usr/lib/systemd/systemd-resolved"
type=PATH msg=audit(1526509448.223:83): item=0 name="/run/dbus/system_bus_socket" inode=22634 dev=00:17 mode=0140666 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:system_dbusd_var_run_t:s0 nametype=NORMAL cap_fp=0000000000000000 cap_fi=0000000000000000 cap_fe=0 cap_fver=0
type=CWD msg=audit(1526509448.223:83): cwd="/"
type=SYSCALL msg=audit(1526509448.223:83): arch=c000003e syscall=254 success=no exit=-13 a0=f a1=55817d0ce9d0 a2=2000d84 a3=7562642f6e75722f items=1 ppid=1 pid=498 auid=4294967295 uid=193 gid=193 euid=193 suid=193 fsuid=193 egid=193 sgid=193 fsgid=193 tty=(none) ses=4294967295 comm="systemd-resolve" exe="/usr/lib/systemd/systemd-resolved" subj=system_u:system_r:systemd_resolved_t:s0 key=(null)
type=AVC msg=audit(1526509448.223:83): avc:  denied  { read } for  pid=498 comm="systemd-resolve" name="system_bus_socket" dev="tmpfs" ino=22634 scontext=system_u:system_r:systemd_resolved_t:s0 tcontext=system_u:object_r:system_dbusd_var_run_t:s0 tclass=sock_file permissive=0

I added the following rules and the errors in the logs were resolved (I'm not sure if write access is also required though!):

#============= systemd_networkd_t ==============
allow systemd_networkd_t system_dbusd_var_run_t:dir read;
allow systemd_networkd_t system_dbusd_var_run_t:sock_file read;

#============= systemd_resolved_t ==============
allow systemd_resolved_t system_dbusd_var_run_t:dir read;
allow systemd_resolved_t system_dbusd_var_run_t:sock_file read;

Comment 1 Fedora Update System 2018-06-06 13:36:07 UTC
selinux-policy-3.14.1-32.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-743a9247de

Comment 2 Fedora Update System 2018-06-07 13:16:42 UTC
selinux-policy-3.14.1-32.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-743a9247de

Comment 3 Fedora Update System 2018-06-09 20:41:48 UTC
selinux-policy-3.14.1-32.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.