Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.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.

Bug 974992

Summary: SELinux prevents /usr/sbin/chronyd from calling sched_setscheduler
Product: Red Hat Enterprise Linux 7 Reporter: Milos Malik <mmalik>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED CURRENTRELEASE QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0   
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-06-13 09:23:20 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Milos Malik 2013-06-17 10:32:23 UTC
Description of problem:

Version-Release number of selected component (if applicable):
chrony-1.27-3.el7.x86_64
selinux-policy-3.12.1-49.el7.noarch
selinux-policy-devel-3.12.1-49.el7.noarch
selinux-policy-doc-3.12.1-49.el7.noarch
selinux-policy-minimum-3.12.1-49.el7.noarch
selinux-policy-mls-3.12.1-49.el7.noarch
selinux-policy-targeted-3.12.1-49.el7.noarch

How reproducible:
always

Steps to Reproduce:
1. get a RHEL-7.0 machine
2. add "sched_priority 50" to /etc/chrony.conf
3. service chronyd restart
4. search for AVCs

Actual results:
----
type=SYSCALL msg=audit(06/17/2013 12:29:21.658:25065) : arch=x86_64 syscall=sched_setscheduler success=no exit=-1(Operation not permitted) a0=0x0 a1=SCHED_FIFO a2=0x7fff9169f7e0 a3=0x3 items=0 ppid=1 pid=26360 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root ses=unset tty=(none) comm=chronyd exe=/usr/sbin/chronyd subj=system_u:system_r:chronyd_t:s0 key=(null) 
type=AVC msg=audit(06/17/2013 12:29:21.658:25065) : avc:  denied  { sys_nice } for  pid=26360 comm=chronyd capability=sys_nice  scontext=system_u:system_r:chronyd_t:s0 tcontext=system_u:system_r:chronyd_t:s0 tclass=capability 
----

Expected results:
 * no AVCs

Comment 1 Milos Malik 2013-07-09 11:33:22 UTC
# rpm -qa selinux-policy\*
selinux-policy-minimum-3.12.1-59.el7.noarch
selinux-policy-mls-3.12.1-59.el7.noarch
selinux-policy-3.12.1-59.el7.noarch
selinux-policy-doc-3.12.1-59.el7.noarch
selinux-policy-devel-3.12.1-59.el7.noarch
selinux-policy-targeted-3.12.1-59.el7.noarch
# sestatus 
SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   enforcing
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Max kernel policy version:      28
#

Another AVC appeared:
----
time->Tue Jul  9 13:31:30 2013
type=SYSCALL msg=audit(1373369490.539:8968): arch=c000003e syscall=144 success=no exit=-13 a0=0 a1=1 a2=7ffffe13de90 a3=2 items=0 ppid=1 pid=23879 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm="chronyd" exe="/usr/sbin/chronyd" subj=system_u:system_r:chronyd_t:s0 key=(null)
type=AVC msg=audit(1373369490.539:8968): avc:  denied  { setsched } for  pid=23879 comm="chronyd" scontext=system_u:system_r:chronyd_t:s0 tcontext=system_u:system_r:chronyd_t:s0 tclass=process
----

Comment 2 Miroslav Grepl 2013-07-10 08:47:50 UTC
commit aa5d8ce77972d914dcc6bed675a461c0f63f0cd8
Author: Miroslav Grepl <mgrepl>
Date:   Wed Jul 10 10:47:29 2013 +0200

    Allow setsched for chronyd

Comment 4 Ludek Smid 2014-06-13 09:23:20 UTC
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.