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Bug 2088257

Summary:	[RHEL-9.1] avc denied seen while provisioning
Product:	Red Hat Enterprise Linux 9	Reporter:	zguo <zguo>
Component:	selinux-policy	Assignee:	Nikola Knazekova <nknazeko>
Status:	CLOSED ERRATA	QA Contact:	Milos Malik <mmalik>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	9.0	CC:	apeetham, kheib, lvrabec, mmalik, mschmidt, nknazeko, ssekidde
Target Milestone:	rc	Keywords:	AutoVerified, Triaged
Target Release:	9.1	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	selinux-policy-34.1.40-1.el9	Doc Type:	Bug Fix
Doc Text:	Cause: SELinux prevents systemd-modules-load write to the kernel messages device and send a message to syslogd over a unix domain datagram socket Consequence: Failing tests Fix: Allow systemd_modules_load_t write to the kernel messages device and send a message to syslogd over a unix domain datagram socket Result: No AVC	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-11-15 11:13:50 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:

Comment 1 Zdenek Pytela 2022-05-19 07:34:30 UTC

Hi,

Do you happen to know which conditions are required to trigger these denials?

The denials interpreted:
----
type=PROCTITLE msg=audit(05/19/2022 04:46:29.636:43) : proctitle=/lib/systemd/systemd-modules-load /etc/rdma/modules/iwarp.conf
type=AVC msg=audit(05/19/2022 04:46:29.636:43) : avc:  denied  { sendto } for  pid=867 comm=systemd-modules path=/run/systemd/journal/socket scontext=system_u:system_r:systemd_modules_load_t:s0 tcontext=system_u:system_r:syslogd_t:s0 tclass=unix_dgram_socket permissive=0
type=SYSCALL msg=audit(05/19/2022 04:46:29.636:43) : arch=x86_64 syscall=connect success=no exit=EACCES(Permission denied) a0=0x3 a1=0x7f7b67df0060 a2=0x1e a3=0x7ffcaead12a0 items=0 ppid=1 pid=867 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=systemd-modules exe=/usr/lib/systemd/systemd-modules-load subj=system_u:system_r:systemd_modules_load_t:s0 key=(null)
----
type=PROCTITLE msg=audit(05/19/2022 04:46:29.636:44) : proctitle=/lib/systemd/systemd-modules-load /etc/rdma/modules/iwarp.conf
type=AVC msg=audit(05/19/2022 04:46:29.636:44) : avc:  denied  { write } for  pid=867 comm=systemd-modules name=kmsg dev="devtmpfs" ino=10 scontext=system_u:system_r:systemd_modules_load_t:s0 tcontext=system_u:object_r:kmsg_device_t:s0 tclass=chr_file permissive=0
type=SYSCALL msg=audit(05/19/2022 04:46:29.636:44) : arch=x86_64 syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD a1=0x7f7b67dee7c8 a2=O_WRONLY|O_NOCTTY|O_CLOEXEC a3=0x0 items=0 ppid=1 pid=867 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=systemd-modules exe=/usr/lib/systemd/systemd-modules-load subj=system_u:system_r:systemd_modules_load_t:s0 key=(null)
----

Comment 2 Zdenek Pytela 2022-05-19 07:35:40 UTC

*** Bug 2088258 has been marked as a duplicate of this bug. ***

Comment 3 zguo 2022-05-19 08:59:37 UTC

(In reply to Zdenek Pytela from comment #1)
> Hi,
> 
> Do you happen to know which conditions are required to trigger these denials?
> 
> The denials interpreted:
> ----
> type=PROCTITLE msg=audit(05/19/2022 04:46:29.636:43) :
> proctitle=/lib/systemd/systemd-modules-load /etc/rdma/modules/iwarp.conf
> type=AVC msg=audit(05/19/2022 04:46:29.636:43) : avc:  denied  { sendto }
> for  pid=867 comm=systemd-modules path=/run/systemd/journal/socket
> scontext=system_u:system_r:systemd_modules_load_t:s0
> tcontext=system_u:system_r:syslogd_t:s0 tclass=unix_dgram_socket permissive=0
> type=SYSCALL msg=audit(05/19/2022 04:46:29.636:43) : arch=x86_64
> syscall=connect success=no exit=EACCES(Permission denied) a0=0x3
> a1=0x7f7b67df0060 a2=0x1e a3=0x7ffcaead12a0 items=0 ppid=1 pid=867
> auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root
> sgid=root fsgid=root tty=(none) ses=unset comm=systemd-modules
> exe=/usr/lib/systemd/systemd-modules-load
> subj=system_u:system_r:systemd_modules_load_t:s0 key=(null)
> ----
> type=PROCTITLE msg=audit(05/19/2022 04:46:29.636:44) :
> proctitle=/lib/systemd/systemd-modules-load /etc/rdma/modules/iwarp.conf
> type=AVC msg=audit(05/19/2022 04:46:29.636:44) : avc:  denied  { write } for
> pid=867 comm=systemd-modules name=kmsg dev="devtmpfs" ino=10
> scontext=system_u:system_r:systemd_modules_load_t:s0
> tcontext=system_u:object_r:kmsg_device_t:s0 tclass=chr_file permissive=0
> type=SYSCALL msg=audit(05/19/2022 04:46:29.636:44) : arch=x86_64
> syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD
> a1=0x7f7b67dee7c8 a2=O_WRONLY|O_NOCTTY|O_CLOEXEC a3=0x0 items=0 ppid=1
> pid=867 auid=unset uid=root gid=root euid=root suid=root fsuid=root
> egid=root sgid=root fsgid=root tty=(none) ses=unset comm=systemd-modules
> exe=/usr/lib/systemd/systemd-modules-load
> subj=system_u:system_r:systemd_modules_load_t:s0 key=(null)
> ----

I am not clear, but at least it might need a machine which is with iWarp device installed. Looping RDMA developers for info.

Comment 4 Milos Malik 2022-05-19 16:16:47 UTC

Following SELinux denials appeared in enforcing mode:
----
type=PROCTITLE msg=audit(05/19/2022 12:12:50.249:249) : proctitle=/usr/lib/systemd/systemd-modules-load 
type=SYSCALL msg=audit(05/19/2022 12:12:50.249:249) : arch=x86_64 syscall=connect success=no exit=EACCES(Permission denied) a0=0x3 a1=0x7f51dd53f060 a2=0x1e a3=0x7fff99401f20 items=0 ppid=1 pid=40491 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=systemd-modules exe=/usr/lib/systemd/systemd-modules-load subj=system_u:system_r:systemd_modules_load_t:s0 key=(null) 
type=AVC msg=audit(05/19/2022 12:12:50.249:249) : avc:  denied  { sendto } for  pid=40491 comm=systemd-modules path=/run/systemd/journal/socket scontext=system_u:system_r:systemd_modules_load_t:s0 tcontext=system_u:system_r:syslogd_t:s0 tclass=unix_dgram_socket permissive=0 
----
type=PROCTITLE msg=audit(05/19/2022 12:12:50.249:250) : proctitle=/usr/lib/systemd/systemd-modules-load 
type=SYSCALL msg=audit(05/19/2022 12:12:50.249:250) : arch=x86_64 syscall=openat success=no exit=EACCES(Permission denied) a0=AT_FDCWD a1=0x7f51dd53d7c8 a2=O_WRONLY|O_NOCTTY|O_CLOEXEC a3=0x0 items=0 ppid=1 pid=40491 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=systemd-modules exe=/usr/lib/systemd/systemd-modules-load subj=system_u:system_r:systemd_modules_load_t:s0 key=(null) 
type=AVC msg=audit(05/19/2022 12:12:50.249:250) : avc:  denied  { write } for  pid=40491 comm=systemd-modules name=kmsg dev="devtmpfs" ino=10 scontext=system_u:system_r:systemd_modules_load_t:s0 tcontext=system_u:object_r:kmsg_device_t:s0 tclass=chr_file permissive=0 
----

Comment 6 Zdenek Pytela 2022-05-27 12:02:30 UTC

*** Bug 2088258 has been marked as a duplicate of this bug. ***

Comment 21 errata-xmlrpc 2022-11-15 11:13:50 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 (selinux-policy bug fix and enhancement update), 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-2022:8283