Bug 1036430

Summary: SELinux is preventing /usr/sbin/rpc.mountd from 'read' accesses on the blk_file bcache0.
Product: [Fedora] Fedora Reporter: Martin <mholec>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 20CC: dominick.grift, dwalsh, jeremy, lvrabec, mgrepl, tpelka
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:05c8cf0daf1c9b0943c1a9433f5aa03146a840ef34aa0e471097ca625f67db05
Fixed In Version: selinux-policy-3.12.1-116.fc20 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-01-16 07:09:15 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Martin 2013-12-02 00:01:08 UTC 
Description of problem:
mounting NFS share from another machine
bcache0 is SSD cache, see: http://fedoraproject.org/wiki/Changes/SSD_cache
SELinux is preventing /usr/sbin/rpc.mountd from 'read' accesses on the blk_file bcache0.

*****  Plugin device (91.4 confidence) suggests   ****************************

If you want to allow rpc.mountd to have read access on the bcache0 blk_file
Then you need to change the label on bcache0 to a type of a similar device.
Do
# semanage fcontext -a -t SIMILAR_TYPE 'bcache0'
# restorecon -v 'bcache0'

*****  Plugin catchall (9.59 confidence) suggests   **************************

If you believe that rpc.mountd should be allowed read access on the bcache0 blk_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:
# grep rpc.mountd /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:nfsd_t:s0
Target Context                system_u:object_r:device_t:s0
Target Objects                bcache0 [ blk_file ]
Source                        rpc.mountd
Source Path                   /usr/sbin/rpc.mountd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           nfs-utils-1.2.8-6.0.fc20.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-105.fc20.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.11.9-300.fc20.x86_64 #1 SMP Wed
                              Nov 20 22:23:25 UTC 2013 x86_64 x86_64
Alert Count                   3
First Seen                    2013-12-01 22:49:47 CET
Last Seen                     2013-12-02 00:15:28 CET
Local ID                      79178d36-f2ca-4332-b01a-fbaa92e2da52

Raw Audit Messages
type=AVC msg=audit(1385939728.209:1575): avc:  denied  { read } for  pid=32246 comm="rpc.mountd" name="bcache0" dev="devtmpfs" ino=15057 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=blk_file


type=AVC msg=audit(1385939728.209:1575): avc:  denied  { open } for  pid=32246 comm="rpc.mountd" path="/dev/bcache0" dev="devtmpfs" ino=15057 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:device_t:s0 tclass=blk_file


type=SYSCALL msg=audit(1385939728.209:1575): arch=x86_64 syscall=open success=yes exit=ENOMEM a0=7f57a638de50 a1=80000 a2=7fff31791ce0 a3=0 items=0 ppid=1 pid=32246 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm=rpc.mountd exe=/usr/sbin/rpc.mountd subj=system_u:system_r:nfsd_t:s0 key=(null)

Hash: rpc.mountd,nfsd_t,device_t,blk_file,read

Additional info:
reporter:       libreport-2.1.9
hashmarkername: setroubleshoot
kernel:         3.11.9-300.fc20.x86_64
type:           libreport
Comment 1 Daniel Walsh 2013-12-02 16:35:49 UTC 
*** Bug 1036431 has been marked as a duplicate of this bug. ***
Comment 2 Jeremy Fitzhardinge 2014-01-13 00:15:00 UTC 
I see the same. This fixed it for me:

# semanage fcontext -a -f b -t fixed_disk_device_t '/dev/bcache[0-9]+'
Comment 3 Miroslav Grepl 2014-01-13 13:24:57 UTC 
commit 7cbe390ca4c9d529111170cf5cd6ecd7a2cb5823
Author: Miroslav Grepl <mgrepl>
Date:   Mon Jan 13 14:24:47 2014 +0100

    Add filename transitions for bcache devices
Comment 4 Fedora Update System 2014-01-13 22:55:06 UTC 
selinux-policy-3.12.1-116.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/selinux-policy-3.12.1-116.fc20
Comment 5 Fedora Update System 2014-01-15 05:56:45 UTC 
Package selinux-policy-3.12.1-116.fc20:
* should fix your issue,
* was pushed to the Fedora 20 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing selinux-policy-3.12.1-116.fc20'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2014-0806/selinux-policy-3.12.1-116.fc20
then log in and leave karma (feedback).
Comment 6 Fedora Update System 2014-01-16 07:09:15 UTC 
selinux-policy-3.12.1-116.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.