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Bug 2175516 - [RHEL 9] avc: denied { search } for pid=21104 comm="rpc.statd" name="net" dev="proc"
Summary: [RHEL 9] avc: denied { search } for pid=21104 comm="rpc.statd" name="net" ...
Keywords:
Status: CLOSED MIGRATED
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: 9.2
Hardware: Unspecified
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Nikola Knazekova
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2023-03-05 14:03 UTC by Zhi Li
Modified: 2023-08-21 18:49 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-08-21 18:49:54 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github fedora-selinux selinux-policy pull 1663 0 None open Allow rpc.statd to search network sysctl dirs 2023-04-26 18:42:34 UTC
Red Hat Issue Tracker   RHEL-1558 0 None Migrated None 2023-08-23 14:44:57 UTC
Red Hat Issue Tracker RHELPLAN-150680 0 None None None 2023-03-05 14:04:43 UTC

Description Zhi Li 2023-03-05 14:03:29 UTC 
Description of problem:

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
Memory protection checking:     actual (secure)
Max kernel policy version:      33
selinux-policy-38.1.8-1.el9.noarch
----
time->Wed Mar  1 08:23:45 2023
type=PROCTITLE msg=audit(1677677025.236:151): proctitle="/usr/sbin/rpc.statd"
type=SYSCALL msg=audit(1677677025.236:151): arch=c000003e syscall=257 success=no exit=-13 a0=ffffff9c a1=7ffc8ff7d990 a2=80100 a3=0 items=0 ppid=1 pid=21104 auid=4294967295 uid=29 gid=29 euid=29 suid=29 fsuid=29 egid=29 sgid=29 fsgid=29 tty=(none) ses=4294967295 comm="rpc.statd" exe="/usr/sbin/rpc.statd" subj=system_u:system_r:rpcd_t:s0 key=(null)
type=AVC msg=audit(1677677025.236:151): avc:  denied  { search } for  pid=21104 comm="rpc.statd" name="net" dev="proc" ino=34064 scontext=system_u:system_r:rpcd_t:s0 tcontext=system_u:object_r:sysctl_net_t:s0 tclass=dir permissive=0

Version-Release number of selected component (if applicable):
nfs-utils-2.5.4-18.el9.x86_64
selinux-policy-38.1.8-1.el9.noarch


How reproducible:
once


Actual results:
AVC denied

Expected results:
No AVC denied for defined operations

Additional info:
beaker job:
https://beaker.engineering.redhat.com/recipes/13475947#task156886730
Comment 1 Milos Malik 2023-03-06 15:22:54 UTC 
Found 4 occurrences of the SELinux denial in the beaker job.
Comment 6 Nikola Knazekova 2023-06-14 14:28:40 UTC 
PR: https://github.com/fedora-selinux/selinux-policy/pull/1740
Comment 12 Nikola Knazekova 2023-08-01 15:51:38 UTC 
Hi,

Can you reproduce the issue in permissive mode with full auditing enabled?

Permissive mode:
# setenforce 0

Full audit:
1) Open the /etc/audit/rules.d/audit.rules file in an editor.
2) Remove the following line if it exists:
-a task,never
3) Add the following line to the end of the file:
-w /etc/shadow -p w
4) Restart the audit daemon:
  # service auditd restart
5) Re-run your scenario.
6) Collect AVC denials:
  # ausearch -i -m avc,user_avc,selinux_err,user_selinux_err -ts today

Thank you
Comment 14 Zhi Li 2023-08-07 09:51:53 UTC 
(In reply to Nikola Knazekova from comment #12)
> Hi,
> 
> Can you reproduce the issue in permissive mode with full auditing enabled?
> 
> Permissive mode:
> # setenforce 0
> 
> Full audit:
> 1) Open the /etc/audit/rules.d/audit.rules file in an editor.
> 2) Remove the following line if it exists:
> -a task,never
> 3) Add the following line to the end of the file:
> -w /etc/shadow -p w
> 4) Restart the audit daemon:
>   # service auditd restart
> 5) Re-run your scenario.
> 6) Collect AVC denials:
>   # ausearch -i -m avc,user_avc,selinux_err,user_selinux_err -ts today
> 
> Thank you

The SELinux denial was not reproduced in loose mode with full auditing enabled, but this problem
did not find a valid trigger step, and it was not 100% reproducible in my test scenario.

[root@ibm-x3650m4-01-vm-11 ]# ausearch -i -m avc,user_avc,selinux_err,user_selinux_err -ts today
<no matches>
Comment 18 RHEL Program Management 2023-08-21 18:47:15 UTC 
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.
Comment 19 RHEL Program Management 2023-08-21 18:49:54 UTC 
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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