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Bug 1689186 - SELinux is preventing tlp from 'write' accesses on the Datei lock_tlp.
Summary: SELinux is preventing tlp from 'write' accesses on the Datei lock_tlp.
Keywords:
Status: ASSIGNED
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 30
Hardware: x86_64
OS: Unspecified
low
low
Target Milestone: ---
Assignee: Lukas Vrabec
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: abrt_hash:0fe6c4e97436995837796a159e9...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-03-15 11:18 UTC by J. Haas
Modified: 2019-03-20 21:16 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed:


Attachments (Terms of Use)

Description J. Haas 2019-03-15 11:18:37 UTC
Description of problem:
Waking up from standby
SELinux is preventing tlp from 'write' accesses on the Datei lock_tlp.

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

Wenn Sie denken, dass es tlp standardmäßig erlaubt sein sollte, write Zugriff auf lock_tlp file zu erhalten.
Then sie sollten dies als Fehler melden.
Um diesen Zugriff zu erlauben, können Sie ein lokales Richtlinien-Modul erstellen.
Do
zugriff jetzt erlauben, indem Sie die nachfolgenden Befehle ausführen:
# ausearch -c 'tlp' --raw | audit2allow -M my-tlp
# semodule -X 300 -i my-tlp.pp

Additional Information:
Source Context                system_u:system_r:tlp_t:s0
Target Context                system_u:object_r:var_run_t:s0
Target Objects                lock_tlp [ file ]
Source                        tlp
Source Path                   tlp
Port                          <Unbekannt>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.3-23.fc30.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 5.0.0-300.fc30.x86_64 #1 SMP Mon
                              Mar 4 22:46:48 UTC 2019 x86_64 x86_64
Alert Count                   4
First Seen                    2019-03-15 11:59:12 CET
Last Seen                     2019-03-15 12:16:31 CET
Local ID                      fca7c2e8-942f-4176-9953-4a50f6ff2970

Raw Audit Messages
type=AVC msg=audit(1552648591.621:311): avc:  denied  { write } for  pid=5218 comm="tlp" name="lock_tlp" dev="tmpfs" ino=26266 scontext=system_u:system_r:tlp_t:s0 tcontext=system_u:object_r:var_run_t:s0 tclass=file permissive=0


Hash: tlp,tlp_t,var_run_t,file,write

Version-Release number of selected component:
selinux-policy-3.14.3-23.fc30.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.10.0
hashmarkername: setroubleshoot
kernel:         5.0.0-300.fc30.x86_64
type:           libreport

Potential duplicate: bug 1562382

Comment 1 Lukas Vrabec 2019-03-20 20:48:07 UTC
Hi, 

How did you start tlp? Using systemctl? 

Thanks,
Lukas.

Comment 2 J. Haas 2019-03-20 20:50:39 UTC
I guess? As far as I can see, it runs automatically every boot:

[jh@xps ~]$ sudo systemctl status tlp
● tlp.service - TLP system startup/shutdown
   Loaded: loaded (/usr/lib/systemd/system/tlp.service; enabled; vendor preset: enabled)
   Active: active (exited) since Wed 2019-03-20 21:12:03 CET; 37min ago
     Docs: http://linrunner.de/tlp
  Process: 2043 ExecStart=/usr/sbin/tlp init start (code=exited, status=0/SUCCESS)
 Main PID: 2043 (code=exited, status=0/SUCCESS)

Mär 20 21:12:02 xps systemd[1]: Starting TLP system startup/shutdown...
Mär 20 21:12:03 xps tlp[2043]: Applying power save settings...done.
Mär 20 21:12:03 xps tlp[2043]: Setting battery charge thresholds...done.
Mär 20 21:12:03 xps systemd[1]: Started TLP system startup/shutdown.

Comment 3 Lukas Vrabec 2019-03-20 21:04:21 UTC
Could you remove file "lock_tlp" and try to reproduce the scenario? 

Thanks,
Lukas.

Comment 4 J. Haas 2019-03-20 21:16:18 UTC
I assume you mean /run/tlp/lock_tlp, it's in the run directory, so it should be recreated every boot? In that case deleting it probably doesn't fix the problem as it's regularly deleted anyway.

[jh@xps ~]$ LANG=C stat /run/tlp/lock_tlp 
  File: /run/tlp/lock_tlp
  Size: 0         	Blocks: 0          IO Block: 4096   regular empty file
Device: 17h/23d	Inode: 46615       Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Context: system_u:object_r:tlp_var_run_t:s0
Access: 2019-03-20 21:12:02.638706927 +0100
Modify: 2019-03-20 22:12:12.212003982 +0100
Change: 2019-03-20 22:12:12.212003982 +0100
 Birth: -

The SE-Linux denial isn't really reproducible, it only happens sometimes after opening the laptop lid. If you have any idea how to reproduce, please comment.


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