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Bug 1393774 - systemd can't create dev-log socket
Summary: systemd can't create dev-log socket
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 24
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Lukas Vrabec
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-11-10 10:22 UTC by Jakub Jelen
Modified: 2017-01-10 08:18 UTC (History)
7 users (show)

Fixed In Version: selinux-policy-3.13.1-191.23.fc24
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-01-10 08:18:45 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Jakub Jelen 2016-11-10 10:22:39 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
selinux-policy-3.13.1-191.19.fc24.noarch

How reproducible:
always

Steps to Reproduce:
1. Remove the /run/systemd/journal/dev-log
2. Restart system-journald
3. Or play with the systemd-journald-dev-log.socket (turn off and on)

Actual results:
Socket is not created and logging does not work.

Expected results:
The socket should be created and logging working

Additional info:
# ausearch -m AVC
# audit2allow 
----
time->Wed Nov  9 08:46:21 2016
type=AVC msg=audit(1478699181.421:76704): avc:  denied  { create } for  pid=1 comm="systemd" name="dev-log" scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:devlog_t:s0 tclass=sock_file permissive=0
----
time->Wed Nov  9 08:46:22 2016
type=AVC msg=audit(1478699182.100:76708): avc:  denied  { create } for  pid=1 comm="systemd" name="dev-log" scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:devlog_t:s0 tclass=sock_file permissive=0


#============= init_t ==============
allow init_t devlog_t:sock_file create;


---------
The logging socket dev-log can be created by systemd in socket activation (in the ListenDatagram option in the socket above), so this systemd should be able to create it.
Comment 1 Jakub Jelen 2016-11-10 10:28:27 UTC 
This is a problem in all other Fedoras and most probably in RHEL7 too (needs investigation)
Comment 2 Jakub Jelen 2016-11-10 13:07:48 UTC 
Probably related to the other issue I can see in the logs about the unlink when calling

# systemctl restart systemd-journald systemd-journald-dev-log.socket

results in 

# audit2allow 
----
time->Wed Nov  9 06:46:09 2016
type=AVC msg=audit(1478691969.589:23727): avc:  denied  { unlink } for  pid=1 comm="systemd" name="dev-log" dev="tmpfs" ino=10903 scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:devlog_t:s0 tclass=sock_file permissive=0


#============= init_t ==============
allow init_t devlog_t:sock_file unlink;


Please, add also this one.
Comment 3 Lukas Vrabec 2016-11-30 12:05:23 UTC 
commit 30029d61dd8fec49ecdea8374b719ec4de709612
Author: Lukas Vrabec <lvrabec>
Date:   Wed Nov 30 13:04:26 2016 +0100

    Update logging_create_devlog_dev() interface to allow calling domain create also sock_file dev-log. BZ(1393774)

diff --git a/policy/modules/system/logging.if b/policy/modules/system/logging.if
index 31be8ac..0690edf 100644
--- a/policy/modules/system/logging.if
+++ b/policy/modules/system/logging.if
@@ -614,6 +614,7 @@ interface(`logging_create_devlog_dev',`
        ')
 
        allow $1 devlog_t:lnk_file manage_lnk_file_perms;
+    allow $1 devlog_t:sock_file manage_sock_file_perms;
        dev_filetrans($1, devlog_t, lnk_file, "log")
        init_pid_filetrans($1, devlog_t, sock_file, "syslog")
     logging_syslogd_pid_filetrans($1, devlog_t, sock_file, "dev-log")
Comment 4 Fedora Update System 2016-12-05 17:04:17 UTC 
selinux-policy-3.13.1-191.23.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-90bd4d7d33
Comment 5 Fedora Update System 2016-12-07 02:57:15 UTC 
selinux-policy-3.13.1-191.23.fc24 has been pushed to the Fedora 24 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-2016-90bd4d7d33
Comment 6 Fedora Update System 2017-01-10 08:18:45 UTC 
selinux-policy-3.13.1-191.23.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
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