Bug 1613635 - SELinux is preventing systemd-user-ru from 'unlink' accesses on the lnk_file .flatpak-cache.
Summary: SELinux is preventing systemd-user-ru from 'unlink' accesses on the lnk_file ...
Keywords:
Status: CLOSED DUPLICATE of bug 1644313
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 29
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Lukas Vrabec
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: abrt_hash:26169c0c66560f7d9bf47493543...
: 1619567 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-08-08 03:46 UTC by Mikhail
Modified: 2018-11-04 10:21 UTC (History)
9 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2018-11-04 10:21:15 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
journal snippet (19.91 KB, text/plain)
2018-09-12 15:17 UTC, Chris Murphy
no flags Details

Description Mikhail 2018-08-08 03:46:40 UTC
Description of problem:
SELinux is preventing systemd-user-ru from 'unlink' accesses on the lnk_file .flatpak-cache.

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

If you believe that systemd-user-ru should be allowed unlink access on the .flatpak-cache lnk_file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'systemd-user-ru' --raw | audit2allow -M my-systemduserru
# semodule -X 300 -i my-systemduserru.pp

Additional Information:
Source Context                system_u:system_r:init_t:s0
Target Context                unconfined_u:object_r:user_tmp_t:s0
Target Objects                .flatpak-cache [ lnk_file ]
Source                        systemd-user-ru
Source Path                   systemd-user-ru
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.2-30.fc29.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 4.18.0-0.rc7.git1.1.fc29.x86_64 #1
                              SMP Wed Aug 1 16:46:20 UTC 2018 x86_64 x86_64
Alert Count                   1
First Seen                    2018-08-08 08:10:15 +05
Last Seen                     2018-08-08 08:10:15 +05
Local ID                      0131d677-bed6-44ad-b527-992494451e4d

Raw Audit Messages
type=AVC msg=audit(1533697815.785:910): avc:  denied  { unlink } for  pid=8767 comm="systemd-user-ru" name=".flatpak-cache" dev="tmpfs" ino=5201491 scontext=system_u:system_r:init_t:s0 tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=lnk_file permissive=1


Hash: systemd-user-ru,init_t,user_tmp_t,lnk_file,unlink

Version-Release number of selected component:
selinux-policy-3.14.2-30.fc29.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.18.0-0.rc7.git1.1.fc29.x86_64
type:           libreport

Comment 1 Jan Kurik 2018-08-14 08:38:02 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 29 development cycle.
Changing version to '29'.

Comment 2 Chris Murphy 2018-09-12 15:02:51 UTC
*** Bug 1619567 has been marked as a duplicate of this bug. ***

Comment 3 Chris Murphy 2018-09-12 15:12:32 UTC
I see this with selinux-policy-3.14.2-34.fc29.noarch

It's happening when the user logs out of a GNOME user session (back to login screen), and I get this sequence:

[15498.950104] f29h.local systemd-logind[710]: New session c2 of user gdm.
[15498.954264] f29h.local systemd[1]: user: Killing process 5145 (gpg-agent) with signal SIGKILL.
[15498.954444] f29h.local systemd[1]: user-runtime-dir: Unit not needed anymore. Stopping.
[15498.957437] f29h.local systemd[1]: Started Session c2 of user gdm.
[15498.960091] f29h.local systemd[1]: Stopped User Manager for UID 1000.
[15498.960277] f29h.local systemd[1]: user-runtime-dir: Unit not needed anymore. Stopping.
[15498.960666] f29h.local audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=user@1000 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
[15498.961357] f29h.local systemd[1]: Removed slice User Slice of UID 1000.
[15498.963540] f29h.local systemd[1]: Stopping /run/user/1000 mount wrapper...
[15498.974430] f29h.local audit[9294]: AVC avc:  denied  { unlink } for  pid=9294 comm="systemd-user-ru" name=".flatpak-cache" dev="tmpfs" ino=59188 scontext=system_u:system_r:init_t:s0 tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=lnk_file permissive=0
[15498.974925] f29h.local systemd-user-runtime-dir[9294]: Failed to remove runtime directory /run/user/1000 (before unmounting): Permission denied
[15498.985511] f29h.local systemd[1]: Stopped /run/user/1000 mount wrapper.

Comment 4 Chris Murphy 2018-09-12 15:17:15 UTC
Created attachment 1482723 [details]
journal snippet

Slightly longer range leading up to the AVC.

Comment 5 Chris Murphy 2018-11-02 18:20:01 UTC
If you believe that systemd-user-ru should be allowed unlink access on the .flatpak-cache lnk_file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'systemd-user-ru' --raw | audit2allow -M my-systemduserru
# semodule -X 300 -i my-systemduserru.pp

Additional Information:
Source Context                system_u:system_r:init_t:s0
Target Context                unconfined_u:object_r:user_tmp_t:s0
Target Objects                .flatpak-cache [ lnk_file ]
Source                        systemd-user-ru
Source Path                   systemd-user-ru
Port                          <Unknown>
Host                          flap.local
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.2-40.fc29.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     flap.local
Platform                      Linux flap.local 4.19.0-1.fc30.x86_64 #1 SMP Mon
                              Oct 22 14:04:41 UTC 2018 x86_64 x86_64
Alert Count                   6
First Seen                    2018-10-16 17:25:58 MDT
Last Seen                     2018-10-28 13:16:15 MDT
Local ID                      57f1a8cc-272f-4fea-b45c-4bd87cefed80

Raw Audit Messages
type=AVC msg=audit(1540754175.946:1240): avc:  denied  { unlink } for  pid=19455 comm="systemd-user-ru" name=".flatpak-cache" dev="tmpfs" ino=3116743 scontext=system_u:system_r:init_t:s0 tcontext=unconfined_u:object_r:user_tmp_t:s0 tclass=lnk_file permissive=0

Comment 6 Lukas Vrabec 2018-11-04 10:21:15 UTC

*** This bug has been marked as a duplicate of bug 1644313 ***


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