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Bug 1213709 - pcp: root pmda needs access to /var/lib/pcp/tmp/pmcd/root.socket
Summary: pcp: root pmda needs access to /var/lib/pcp/tmp/pmcd/root.socket
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.1
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks: 1232193
TreeView+ depends on / blocked
 
Reported: 2015-04-21 06:37 UTC by Miloš Prchlík
Modified: 2015-11-19 10:32 UTC (History)
7 users (show)

Fixed In Version: selinux-policy-3.13.1-31.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 1232193 (view as bug list)
Environment:
Last Closed: 2015-11-19 10:32:47 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2300 0 normal SHIPPED_LIVE selinux-policy bug fix update 2015-11-19 09:55:26 UTC

Description Miloš Prchlík 2015-04-21 06:37:34 UTC 
Description of problem:

pmdaroot tries to create and use a unix socket, and this actions raise AVC denials:

type=AVC msg=audit(1429597620.493:1231): avc:  denied  { create } for  pid=13788 comm="pmdaroot" name="root.socket" scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:pcp_var_lib_t:s0 tclass=sock_file
type=AVC msg=audit(1429597620.493:1232): avc:  denied  { write } for  pid=13784 comm="pmcd" name="root.socket" dev="dm-1" ino=70380827 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:pcp_var_lib_t:s0 tclass=sock_file
type=AVC msg=audit(1429597620.493:1232): avc:  denied  { connectto } for  pid=13784 comm="pmcd" path="/var/lib/pcp/tmp/pmcd/root.socket" scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:system_r:pcp_pmcd_t:s0 tclass=unix_stream_socket
type=AVC msg=audit(1429597640.133:1234): avc:  denied  { unlink } for  pid=13788 comm="pmdaroot" name="root.socket" dev="dm-1" ino=70380827 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:pcp_var_lib_t:s0 tclass=sock_file


[root@ibm-p730-02-lp3 root]# ls -alZ /var/lib/pcp/tmp/pmcd
drwx------. root root system_u:object_r:pcp_var_lib_t:s0 .
drwxrwxr-x. pcp  pcp  system_u:object_r:pcp_var_lib_t:s0 ..
srwxr-xr-x. root root unconfined_u:object_r:pcp_var_lib_t:s0 root.socket


Version-Release number of selected component (if applicable):

selinux-policy-3.13.1-23.el7
pcp-3.10.4-1 (quite recent upstream build, this time taken from Fedora)


How reproducible:


Steps to Reproduce:
1. cd /var/lib/pcp/pmdas/root
2. ./Install
3.


Actual results:


Expected results:


Additional info:
Comment 3 Patrik Kis 2015-06-24 09:02:05 UTC 
[root@rhel70 ~]# rpm -q selinux-policy
selinux-policy-3.13.1-27.el7.noarch
[root@rhel70 ~]# audit2allow 
type=AVC msg=audit(1429597620.493:1231): avc:  denied  { create } for  pid=13788 comm="pmdaroot" name="root.socket" scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:pcp_var_lib_t:s0 tclass=sock_file
type=AVC msg=audit(1429597620.493:1232): avc:  denied  { write } for  pid=13784 comm="pmcd" name="root.socket" dev="dm-1" ino=70380827 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:pcp_var_lib_t:s0 tclass=sock_file
type=AVC msg=audit(1429597620.493:1232): avc:  denied  { connectto } for  pid=13784 comm="pmcd" path="/var/lib/pcp/tmp/pmcd/root.socket" scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:system_r:pcp_pmcd_t:s0 tclass=unix_stream_socket
type=AVC msg=audit(1429597640.133:1234): avc:  denied  { unlink } for  pid=13788 comm="pmdaroot" name="root.socket" dev="dm-1" ino=70380827 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:pcp_var_lib_t:s0 tclass=sock_file


#============= pcp_pmcd_t ==============

#!!!! This avc is allowed in the current policy
allow pcp_pmcd_t pcp_var_lib_t:sock_file { write create unlink };

#!!!! This avc can be allowed using the boolean 'daemons_enable_cluster_mode'
allow pcp_pmcd_t self:unix_stream_socket connectto;
[root@rhel70 ~]# 


The unix_stream_socket connectto is allowed via a boolean, is this intentional?
Comment 4 Milos Malik 2015-06-24 09:23:41 UTC 
Please avoid the daemons_enable_cluster_mode boolean. It's meant for cluster purposes only. The scenario described in comment#0 should work even if the boolean is disabled, which means that the last rule suggested by audit2allow is still missing in selinux-policy-3.13.1-27.el7.
Comment 8 errata-xmlrpc 2015-11-19 10:32:47 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, 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-2015-2300.html
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