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Bug 2098189

Summary: SELinux prevents the keepalived process from reading the /sys/devices/system/cpu/ directory
Product: Red Hat Enterprise Linux 8 Reporter: Milos Malik <mmalik>
Component: selinux-policyAssignee: Zdenek Pytela <zpytela>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.7CC: bperkins, lvrabec, mmalik, phil.randal, rohara, ssekidde
Target Milestone: rcKeywords: Triaged
Target Release: 8.7Flags: pm-rhel: mirror+
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-3.14.3-103.el8 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: 2098130 Environment:
Last Closed: 2022-11-08 10:44:31 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 2022-06-17 14:14:59 UTC 
+++ This bug was initially created as a clone of Bug #2098130 +++

Description of problem:

When the keepalived service is configured with vrrp_track_process, SELinux blocks certain actions.

Version-Release number of selected component (if applicable):
keepalived-2.1.5-8.el8.x86_64
selinux-policy-3.14.3-100.el8.noarch
selinux-policy-targeted-3.14.3-100.el8.noarch

How reproducible:

Always with vrrp_track_process specified

Steps to Reproduce:
1. Include the following lines in the /etc/keepalived/keepalived.conf file

vrrp_track_process track_haproxy {
   process haproxy
   quorum 1
   delay 2
   weight 2
}

2. start/restart the keepalived service

Actual results (enforcing mode):
----
type=PROCTITLE msg=audit(06/17/2022 10:13:24.020:421) : proctitle=/usr/sbin/keepalived -D 
type=PATH msg=audit(06/17/2022 10:13:24.020:421) : item=0 name=/sys/devices/system/cpu inode=39 dev=00:15 mode=dir,755 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:sysfs_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(06/17/2022 10:13:24.020:421) : cwd=/ 
type=SYSCALL msg=audit(06/17/2022 10:13:24.020:421) : arch=x86_64 syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD a1=0x7f1d0de91bfc a2=O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC a3=0x0 items=1 ppid=10609 pid=10611 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=keepalived exe=/usr/sbin/keepalived subj=system_u:system_r:keepalived_t:s0 key=(null) 
type=AVC msg=audit(06/17/2022 10:13:24.020:421) : avc:  denied  { read } for  pid=10611 comm=keepalived name=cpu dev="sysfs" ino=39 scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:object_r:sysfs_t:s0 tclass=dir permissive=0 
----

Expected results:
 * no SELinux denials
Comment 1 Milos Malik 2022-06-17 14:16:20 UTC 
Actual results (permissive mode):
----
type=PROCTITLE msg=audit(06/17/2022 10:15:31.978:426) : proctitle=/usr/sbin/keepalived -D 
type=PATH msg=audit(06/17/2022 10:15:31.978:426) : item=0 name=/sys/devices/system/cpu inode=39 dev=00:15 mode=dir,755 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:sysfs_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(06/17/2022 10:15:31.978:426) : cwd=/ 
type=SYSCALL msg=audit(06/17/2022 10:15:31.978:426) : arch=x86_64 syscall=openat success=yes exit=10 a0=AT_FDCWD a1=0x7f44e02d3bfc a2=O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC a3=0x0 items=1 ppid=10633 pid=10635 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=keepalived exe=/usr/sbin/keepalived subj=system_u:system_r:keepalived_t:s0 key=(null) 
type=AVC msg=audit(06/17/2022 10:15:31.978:426) : avc:  denied  { read } for  pid=10635 comm=keepalived name=cpu dev="sysfs" ino=39 scontext=system_u:system_r:keepalived_t:s0 tcontext=system_u:object_r:sysfs_t:s0 tclass=dir permissive=1 
----
Comment 13 errata-xmlrpc 2022-11-08 10:44:31 UTC 
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 (selinux-policy bug fix and enhancement update), 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://access.redhat.com/errata/RHBA-2022:7691