Bug 767786 - SELinux is preventing /sbin/apcupsd from read, write access on the chr_file ttyUSB0.
Summary: SELinux is preventing /sbin/apcupsd from read, write access on the chr_file t...
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 16
Hardware: i686
OS: Unspecified
Target Milestone: ---
Assignee: Miroslav Grepl
QA Contact: Fedora Extras Quality Assurance
Whiteboard: abrt_hash:d1b3058255f42a788cf377e509f...
Depends On:
TreeView+ depends on / blocked
Reported: 2011-12-14 21:16 UTC by c72578
Modified: 2012-02-16 23:15 UTC (History)
5 users (show)

Fixed In Version: selinux-policy-3.10.0-74.fc16
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-01-31 22:02:48 UTC

Attachments (Terms of Use)

Description c72578 2011-12-14 21:16:08 UTC
libreport version: 2.0.8
executable:     /usr/bin/python
hashmarkername: setroubleshoot
kernel:         3.1.5-1.fc16.i686.PAE
reason:         SELinux is preventing /sbin/apcupsd from read, write access on the chr_file ttyUSB0.
time:           Mi 14 Dez 2011 22:13:27 CET

:SELinux is preventing /sbin/apcupsd from read, write access on the chr_file ttyUSB0.
:*****  Plugin catchall (100. confidence) suggests  ***************************
:If you believe that apcupsd should be allowed read write access on the ttyUSB0 chr_file by default.
:Then you should report this as a bug.
:You can generate a local policy module to allow this access.
:allow this access for now by executing:
:# grep apcupsd /var/log/audit/audit.log | audit2allow -M mypol
:# semodule -i mypol.pp
:Additional Information:
:Source Context                system_u:system_r:apcupsd_t:s0
:Target Context                system_u:object_r:usbtty_device_t:s0
:Target Objects                ttyUSB0 [ chr_file ]
:Source                        apcupsd
:Source Path                   /sbin/apcupsd
:Port                          <Unbekannt>
:Host                          (removed)
:Source RPM Packages           apcupsd-3.14.10-1.fc16
:Target RPM Packages           
:Policy RPM                    selinux-policy-3.10.0-64.fc16
:Selinux Enabled               True
:Policy Type                   targeted
:Enforcing Mode                Enforcing
:Host Name                     (removed)
:Platform                      Linux (removed) 3.1.5-1.fc16.i686.PAE #1 SMP
:                              Fri Dec 9 18:02:46 UTC 2011 i686 i686
:Alert Count                   12
:First Seen                    Fr 04 Nov 2011 17:39:35 CET
:Last Seen                     Mi 14 Dez 2011 17:49:30 CET
:Local ID                      a30b3959-5d0c-4d9e-b7f8-9e481262f301
:Raw Audit Messages
:type=AVC msg=audit(1323881370.176:144): avc:  denied  { read write } for  pid=2357 comm="apcupsd" name="ttyUSB0" dev=devtmpfs ino=22293 scontext=system_u:system_r:apcupsd_t:s0 tcontext=system_u:object_r:usbtty_device_t:s0 tclass=chr_file
:type=SYSCALL msg=audit(1323881370.176:144): arch=i386 syscall=open success=no exit=EACCES a0=967f174 a1=902 a2=b a3=9687358 items=0 ppid=1 pid=2357 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=apcupsd exe=/sbin/apcupsd subj=system_u:system_r:apcupsd_t:s0 key=(null)
:Hash: apcupsd,apcupsd_t,usbtty_device_t,chr_file,read,write
:#============= apcupsd_t ==============
:allow apcupsd_t usbtty_device_t:chr_file { read write };
:audit2allow -R
:#============= apcupsd_t ==============
:allow apcupsd_t usbtty_device_t:chr_file { read write };

Comment 1 Daniel Walsh 2011-12-14 21:55:59 UTC
Should the apcupsd be allowed to talk to /dev/ttyUSB0?

Comment 2 c72578 2011-12-15 09:03:04 UTC
Yes, apcupsd should be allowed to talk to /dev/ttyUSB0 by default.

In many cases a UPS is connected to a computer using a serial cable.
Nowadays serial ports are rather rare and often USB-serial adapters have to be used. In such cases, apcupsd has to cummunicate with the attached UPS via /dev/ttyUSB0 or /dev/ttyUSB1 etc.

Comment 3 Daniel Walsh 2011-12-15 17:06:49 UTC
Thanks for confirming.

Comment 4 Daniel Walsh 2011-12-15 17:07:22 UTC
Fixed in Rawhide, Miroslav please backport to RHEL6, F15, F16.

Comment 5 Fedora Update System 2012-01-26 18:16:13 UTC
selinux-policy-3.10.0-74.fc16 has been submitted as an update for Fedora 16.

Comment 6 Fedora Update System 2012-01-28 03:29:21 UTC
Package selinux-policy-3.10.0-74.fc16:
* should fix your issue,
* was pushed to the Fedora 16 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-74.fc16'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 7 Fedora Update System 2012-01-31 22:02:48 UTC
selinux-policy-3.10.0-74.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

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