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Bug 2036582 - SELinux prevents ModemManager from creating the qipcrtr socket
Summary: SELinux prevents ModemManager from creating the qipcrtr socket
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: 9.0
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: 9.0
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
: 2036614 (view as bug list)
Depends On:
Blocks: 1898842
TreeView+ depends on / blocked
 
Reported: 2022-01-03 09:44 UTC by Milos Malik
Modified: 2022-05-17 16:12 UTC (History)
5 users (show)

Fixed In Version: selinux-policy-34.1.21-1.el9
Doc Type: No Doc Update
Doc Text:
Clone Of: 1996903
Environment:
Last Closed: 2022-05-17 15:50:02 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-106741 0 None None None 2022-01-03 09:49:04 UTC
Red Hat Product Errata RHBA-2022:3918 0 None None None 2022-05-17 15:50:11 UTC

Description Milos Malik 2022-01-03 09:44:08 UTC 
+++ This bug was initially created as a clone of Bug #1996903 +++

Problem description:
The ModemManager starts and runs successfully, but it triggers an SELinux denial.

Reproducible with the following packages installed:
ModemManager-1.18.2-3.el9.x86_64
ModemManager-glib-1.18.2-3.el9.x86_64
selinux-policy-34.1.20-1.el9.noarch
selinux-policy-devel-34.1.20-1.el9.noarch
selinux-policy-doc-34.1.20-1.el9.noarch
selinux-policy-mls-34.1.20-1.el9.noarch
selinux-policy-targeted-34.1.20-1.el9.noarch

Reproducible:
 * always

Steps to Reproduce:
1) get a RHEL-9.0 machine
2) (re)start the ModemManager service
3) search for SELinux denials

Actual results (enforcing mode):
----
type=PROCTITLE msg=audit(01/03/2022 10:40:04.355:379) : proctitle=/usr/sbin/ModemManager 
type=SYSCALL msg=audit(01/03/2022 10:40:04.355:379) : arch=x86_64 syscall=socket success=no exit=EACCES(Permission denied) a0=qipcrtr a1=SOCK_DGRAM a2=ip a3=0x10 items=0 ppid=1 pid=5901 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(01/03/2022 10:40:04.355:379) : avc:  denied  { create } for  pid=5901 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=0 
----

Expected results:
 * no SELinux denials
Comment 1 Milos Malik 2022-01-03 09:45:39 UTC 
Actual results (permissive mode):
----
type=PROCTITLE msg=audit(01/03/2022 10:44:39.503:389) : proctitle=/usr/sbin/ModemManager 
type=SYSCALL msg=audit(01/03/2022 10:44:39.503:389) : arch=x86_64 syscall=socket success=yes exit=9 a0=qipcrtr a1=SOCK_DGRAM a2=ip a3=0x10 items=0 ppid=1 pid=5973 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(01/03/2022 10:44:39.503:389) : avc:  denied  { module_request } for  pid=5973 comm=ModemManager kmod="net-pf-42" scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system permissive=1 
type=AVC msg=audit(01/03/2022 10:44:39.503:389) : avc:  denied  { create } for  pid=5973 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1 
----
type=PROCTITLE msg=audit(01/03/2022 10:44:39.513:390) : proctitle=/usr/sbin/ModemManager 
type=SYSCALL msg=audit(01/03/2022 10:44:39.513:390) : arch=x86_64 syscall=getsockopt success=yes exit=0 a0=0x9 a1=SOL_SOCKET a2=SO_TYPE a3=0x7fff9da26054 items=0 ppid=1 pid=5973 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(01/03/2022 10:44:39.513:390) : avc:  denied  { getopt } for  pid=5973 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1 
----
type=PROCTITLE msg=audit(01/03/2022 10:44:39.514:391) : proctitle=/usr/sbin/ModemManager 
type=SOCKADDR msg=audit(01/03/2022 10:44:39.514:391) : saddr={ saddr_fam=qipcrtr (unsupported) } 
type=SYSCALL msg=audit(01/03/2022 10:44:39.514:391) : arch=x86_64 syscall=getsockname success=yes exit=0 a0=0x9 a1=0x7fff9da26060 a2=0x7fff9da26050 a3=0x7fff9da26054 items=0 ppid=1 pid=5973 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ModemManager exe=/usr/sbin/ModemManager subj=system_u:system_r:modemmanager_t:s0 key=(null) 
type=AVC msg=audit(01/03/2022 10:44:39.514:391) : avc:  denied  { getattr } for  pid=5973 comm=ModemManager scontext=system_u:system_r:modemmanager_t:s0 tcontext=system_u:system_r:modemmanager_t:s0 tclass=qipcrtr_socket permissive=1 
----
Comment 3 Zdenek Pytela 2022-01-03 10:33:04 UTC 
Commit to backport:

commit e372b3af701100cab13ef556225ec7d69839e1a3
Author: Zdenek Pytela <zpytela>
Date:   Mon Sep 6 18:05:14 2021 +0200

    Allow ModemManager create a qipcrtr socket
Comment 4 Petr Zatko 2022-01-03 12:06:13 UTC 
*** Bug 2036614 has been marked as a duplicate of this bug. ***
Comment 6 Zdenek Pytela 2022-01-03 12:37:34 UTC 
One more commit needs to be backported:
commit 921c24735f045dc45ea492de8a49c61e385c6ee4
Author: Zdenek Pytela <zpytela>
Date:   Mon Sep 6 17:55:00 2021 +0200

    Allow ModemManager request to load a kernel module
Comment 14 errata-xmlrpc 2022-05-17 15:50:02 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
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