Bug 2533850 - SELinux is preventing chcon from using the 'mac_admin' capabilities.
Summary: SELinux is preventing chcon from using the 'mac_admin' capabilities.
Keywords:
Status: ASSIGNED
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 44
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Zdenek Pytela
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: abrt_hash:6a4be8eb7292e28cbf82df563e6...
: 2535630 2537253 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 14:41 UTC by Khajjith
Modified: 2026-09-22 07:20 UTC (History)
10 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)
File: os_info (712 bytes, text/plain)
2026-09-15 14:42 UTC, Khajjith
no flags Details
File: description (1.83 KB, text/plain)
2026-09-15 14:42 UTC, Khajjith
no flags Details

Description Khajjith 2026-09-15 14:41:58 UTC
Description of problem:
SELinux is preventing chcon from using the 'mac_admin' capabilities.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that chcon should have the mac_admin capability by default.
Then ezt jelentenie kell, mint hibát.
Hogy engedélyezze ezt a hozzáférést előállíthat egy helyi szabálymodult.
Do
allow this access for now by executing:
# ausearch -c 'chcon' --raw | audit2allow -M my-chcon
# semodule -X 300 -i my-chcon.pp

Additional Information:
Source Context                system_u:system_r:tuned_t:s0
Target Context                system_u:system_r:tuned_t:s0
Target Objects                Ismeretlen [ capability2 ]
Source                        chcon
Source Path                   chcon
Port                          <Ismeretlen>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-44.8-1.fc44.noarch
Local Policy RPM              selinux-policy-targeted-44.8-1.fc44.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 7.2.5-200.fc44.x86_64 #1 SMP
                              PREEMPT_DYNAMIC Fri Sep 11 15:11:05 UTC 2026
                              x86_64
Alert Count                   2
First Seen                    2026-09-15 16:24:03 CEST
Last Seen                     2026-09-15 16:24:03 CEST
Local ID                      f9142ba9-ce5e-4053-a6a4-63fed1bb3212

Raw Audit Messages
type=AVC msg=audit(1789482243.483:291): avc:  denied  { mac_admin } for  pid=1341 comm="chcon" capability=33  scontext=system_u:system_r:tuned_t:s0 tcontext=system_u:system_r:tuned_t:s0 tclass=capability2 permissive=0


Hash: chcon,tuned_t,tuned_t,capability2,mac_admin

Version-Release number of selected component:
selinux-policy-targeted-44.8-1.fc44.noarch

Additional info:
reporter:       libreport-2.17.15
reason:         SELinux is preventing chcon from using the 'mac_admin' capabilities.
package:        selinux-policy-targeted-44.8-1.fc44.noarch
hashmarkername: setroubleshoot
component:      selinux-policy
type:           libreport
kernel:         7.2.5-200.fc44.x86_64
component:      selinux-policy

Comment 1 Khajjith 2026-09-15 14:42:00 UTC
Created attachment 2157764 [details]
File: os_info

Comment 2 Khajjith 2026-09-15 14:42:01 UTC
Created attachment 2157765 [details]
File: description

Comment 3 Milos Malik 2026-09-16 15:12:28 UTC
The following SELinux denial appears in enforcing mode:
----
type=PROCTITLE msg=audit(09/16/2026 16:16:05.827:1415) : proctitle=chcon -t invalid_bootcinstall_testlabel_t /tmp/.tmp1Yvsjm 
type=PATH msg=audit(09/16/2026 16:16:05.827:1415) : item=0 name=/tmp/.tmp1Yvsjm inode=46109 dev=00:2b mode=file,600 ouid=root ogid=root rdev=00:00 obj=system_u:object_r:tuned_tmp_t:s0 nametype=NORMAL cap_fp=none cap_fi=none cap_fe=0 cap_fver=0 cap_frootid=0 
type=CWD msg=audit(09/16/2026 16:16:05.827:1415) : cwd=/ 
type=SYSCALL msg=audit(09/16/2026 16:16:05.827:1415) : arch=x86_64 syscall=setxattr success=no exit=EINVAL(Invalid argument) a0=0x55604ebdc110 a1=0x7fbfcd14406f a2=0x55604ebdda00 a3=0x36 items=1 ppid=244209 pid=244214 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=chcon exe=/usr/bin/chcon subj=system_u:system_r:tuned_t:s0 key=(null) 
type=SELINUX_ERR msg=audit(09/16/2026 16:16:05.827:1415) : op=setxattr invalid_context=system_u:object_r:invalid_bootcinstall_testlabel_t:s0 
type=AVC msg=audit(09/16/2026 16:16:05.827:1415) : avc:  denied  { mac_admin } for  pid=244214 comm=chcon capability=mac_admin  scontext=system_u:system_r:tuned_t:s0 tcontext=system_u:system_r:tuned_t:s0 tclass=capability2 permissive=0 
----

# rpm -qa seli\* tuned\* | sort
selinux-policy-44.8-1.fc44.noarch
selinux-policy-devel-44.8-1.fc44.noarch
selinux-policy-doc-44.8-1.fc44.noarch
selinux-policy-targeted-44.8-1.fc44.noarch
tuned-2.28.0-1.fc44.noarch
tuned-gtk-2.28.0-1.fc44.noarch
tuned-ppd-2.28.0-1.fc44.noarch
tuned-utils-2.28.0-1.fc44.noarch
#

Comment 4 Milos Malik 2026-09-16 15:18:56 UTC
The tuned package brings many plugins. One of them calls the bootc command if it's installed:

# rpm -qla tuned\* | grep bootloader
/usr/lib/python3.14/site-packages/tuned/plugins/__pycache__/plugin_bootloader.cpython-314.opt-1.pyc
/usr/lib/python3.14/site-packages/tuned/plugins/__pycache__/plugin_bootloader.cpython-314.pyc
/usr/lib/python3.14/site-packages/tuned/plugins/plugin_bootloader.py
# grep '"bootc"' /usr/lib/python3.14/site-packages/tuned/plugins/plugin_bootloader.py 
		cmd = ["bootc", "loader-entries", "set-options-for-source",
			["bootc", "loader-entries", "set-options-for-source",
#

And the bootc command intentionally triggers the SELinux denial:

 * https://github.com/bootc-dev/bootc/blob/03fa72b194070f6973451aeb52279957535567b0/crates/lib/src/lsm.rs#L50

I removed the bootc package because I don't use the bootc command on my Fedora 44 machine.
The SELinux denials do not appear anymore. They appeared with each power cable plug/unplug which was very annoying.

Comment 5 Milos Malik 2026-09-16 15:21:18 UTC
SELinux policy does not define the invalid_bootcinstall_testlabel_t type. I wonder what would happen if it was defined :-D

Comment 6 Zdenek Pytela 2026-09-18 19:10:39 UTC
*** Bug 2535630 has been marked as a duplicate of this bug. ***

Comment 7 Zdenek Pytela 2026-09-22 07:20:31 UTC
*** Bug 2537253 has been marked as a duplicate of this bug. ***


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