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Bug 1839321 - SELinux AVC records during pcp-pmda-bpftrace installation
Summary: SELinux AVC records during pcp-pmda-bpftrace installation
Keywords:
Status: CLOSED DUPLICATE of bug 1792971
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: pcp
Version: 8.3
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: 8.3
Assignee: Andreas Gerstmayr
QA Contact: Jan Kurik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-05-23 10:40 UTC by Jan Kurik
Modified: 2021-09-17 12:48 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-05-28 14:16:50 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Jan Kurik 2020-05-23 10:40:26 UTC 
Description of problem:
During installation of pcp-pmda-bpftrace the installation script generates SELinux AVC records.


Version-Release number of selected component (if applicable):
* selinux-policy-3.14.3-43.el8
* pcp-selinux-5.1.0-2.el8
* pcp-pmda-bpftrace-5.1.0-2.el8

How reproducible:
Always on all the supported architectures

Steps to Reproduce:
1. Install a fresh RHEL-8.3 system
2. Install pcp-pmda-bpftrace rpm
# yum install -y pcp-pmda-bpftrace
3. Install the PMDA
# cd /var/lib/pcp/pmdas/bpftrace && ./Install

Actual results:
New AVC records in audit log:
----
time->Sat May 23 06:30:37 2020
type=PROCTITLE msg=audit(1590229837.347:299): proctitle=6270667472616365002D66006A736F6E002D650023212F7573722F62696E2F656E762062706674726163650A2F2A0A202A2062696F6C6174656E63792E627409426C6F636B20492F4F206C6174656E6379206173206120686973746F6772616D2E0A202A090909466F72204C696E75782C20757365732062706674726163652C
type=SYSCALL msg=audit(1590229837.347:299): arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=55bb2e0bea70 a2=0 a3=0 items=0 ppid=6516 pid=6527 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="bpftrace" exe="/usr/bin/bpftrace" subj=system_u:system_r:pcp_pmcd_t:s0 key=(null)
type=AVC msg=audit(1590229837.347:299): avc:  denied  { read } for  pid=6527 comm="bpftrace"name="randomize_va_space" dev="proc" ino=36756 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0
----
time->Sat May 23 06:30:37 2020
type=PROCTITLE msg=audit(1590229837.403:300): proctitle=6270667472616365002D66006A736F6E002D650023212F7573722F62696E2F656E762062706674726163650A2F2A0A202A2072756E716C61742E627409435055207363686564756C65722072756E207175657565206C6174656E6379206173206120686973746F6772616D2E0A202A0909466F72204C696E75782C2075736573
type=SYSCALL msg=audit(1590229837.403:300): arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=55eb54408e40 a2=0 a3=0 items=0 ppid=6516 pid=6532 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="bpftrace" exe="/usr/bin/bpftrace" subj=system_u:system_r:pcp_pmcd_t:s0 key=(null)
type=AVC msg=audit(1590229837.403:300): avc:  denied  { read } for  pid=6532 comm="bpftrace"name="randomize_va_space" dev="proc" ino=36756 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:proc_security_t:s0 tclass=file permissive=0


audit2allow shows the following rules:
#============= pcp_pmcd_t ==============
allow pcp_pmcd_t proc_security_t:file read;

Expected results:
No AVC records generated during the PMDA installation
Comment 1 Andreas Gerstmayr 2020-05-28 14:16:50 UTC 
fixed in master already (by Nathan):

commit 55937769c6ac5159d345dfd6d8e6aa7c33258ceb
Author: Nathan Scott <nathans>
Date:   Tue May 5 15:32:46 2020 +1000

    selinux: resolve bpftrace pmda access with latest fedora selinux policy

*** This bug has been marked as a duplicate of bug 1792971 ***
Comment 2 Jan Kurik 2020-06-12 13:00:53 UTC 
Verified on pcp-5.1.1-2.el8  build.
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