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Bug 1657250

Summary: selinux prevents rngd from 'setsched'
Product: Red Hat Enterprise Linux 8 Reporter: Patrik Kis <pkis>
Component: selinux-policyAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED DUPLICATE QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: medium    
Version: 8.0CC: lvrabec, mgrepl, mmalik, plautrba, sgadekar, ssekidde
Target Milestone: rc   
Target Release: 8.0   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
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Clone Of: Environment:
Last Closed: 2018-12-07 15:53:38 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Patrik Kis 2018-12-07 14:10:32 UTC
Description of problem:

When restart ting the rngd daemon the following AVC denuial is logged quite often:

type=PROCTITLE msg=audit(12/07/2018 09:00:35.221:332) : proctitle=/sbin/rngd -f 
type=SYSCALL msg=audit(12/07/2018 09:00:35.221:332) : arch=x86_64 syscall=sched_setaffinity success=no exit=EACCES(Permission denied) a0=0x183c a1=0x8 a2=0x7fa73421dd30 a3=0x7fa73421e9d0 items=0 ppid=1 pid=6203 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=rngd exe=/usr/sbin/rngd subj=system_u:system_r:rngd_t:s0 key=(null) 
type=AVC msg=audit(12/07/2018 09:00:35.221:332) : avc:  denied  { setsched } for  pid=6203 comm=rngd scontext=system_u:system_r:rngd_t:s0 tcontext=system_u:system_r:rngd_t:s0 tclass=process permissive=0 

Version-Release number of selected component (if applicable):
selinux-policy-3.14.1-48.el8
rng-tools-6.6-1.el8

How reproducible:
50%

Steps to Reproduce:

In a few seconds the AVC denials appear on my test system:

while true; do 
  service rngd restart
  ausearch -i -m avc -ts recent && break
  sleep 2
done

Comment 1 Milos Malik 2018-12-07 14:59:26 UTC
I believe this bug is a duplicate of BZ#1653872.

Comment 2 Lukas Vrabec 2018-12-07 15:53:38 UTC

*** This bug has been marked as a duplicate of bug 1653872 ***

Comment 3 Lukas Vrabec 2018-12-11 15:27:03 UTC
*** Bug 1658234 has been marked as a duplicate of this bug. ***