Bug 2049732

Summary:	Add missing policy rules for latest alsactl
Product:	Red Hat Enterprise Linux 9	Reporter:	Jaroslav Kysela <jkysela>
Component:	selinux-policy	Assignee:	Zdenek Pytela <zpytela>
Status:	CLOSED ERRATA	QA Contact:	Milos Malik <mmalik>
Severity:	high	Docs Contact:
Priority:	medium
Version:	9.0	CC:	lvrabec, mmalik, ssekidde
Target Milestone:	rc	Keywords:	AutoVerified, Triaged
Target Release:	9.0	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	selinux-policy-34.1.25-1.el9	Doc Type:	No Doc Update
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-17 15:50:10 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 Jaroslav Kysela 2022-02-02 15:51:16 UTC

The alsactl utility cannot load the requested modules (call kmod utility) and modify the sound driver configuration through sysfs:

Link: https://github.com/alsa-project/alsa-ucm-conf/issues/100

Proposed rules:

  module alsactl 1.0;

  require {
	type sysfs_t;
	type kmod_exec_t;
	type alsa_t;
  	class file { execute write };
  }

  #============= alsa_t ==============
  allow alsa_t kmod_exec_t:file execute;
  allow alsa_t sysfs_t:file write;

Comment 1 Zdenek Pytela 2022-02-04 15:58:16 UTC

Jaroslav,

Can you please share the audit log and reproducing steps?
Is it alsactl which calls kmod?

Comment 2 Zdenek Pytela 2022-02-10 10:51:03 UTC

Commits to backport:
commit d5b75d954771da98c36fb7af90e24a14fb01c184
Author: Zdenek Pytela <zpytela>
Date:   Mon Jan 31 12:47:23 2022 +0100

    Allow alsactl set group Process ID of a process

and
https://github.com/fedora-selinux/selinux-policy/pull/1060

Comment 11 errata-xmlrpc 2022-05-17 15:50:10 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 (new packages: selinux-policy), 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-2022:3918