Bug 1096543

Summary: SELinux is preventing /usr/lib/systemd/systemd-hostnamed from read access on the chr_file .
Product: [Fedora] Fedora Reporter: Joseph D. Wagner <joe>
Component: selinux-policy-targetedAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED DUPLICATE QA Contact: Ben Levenson <benl>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: dominick.grift, dwalsh, johannbg, lnykryn, lvrabec, mgrepl, msekleta, plautrba, s, systemd-maint, vpavlin, zbyszek
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OS: Unspecified   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2014-05-20 10:58:15 UTC Type: Bug
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Description Joseph D. Wagner 2014-05-11 21:47:22 UTC 
SELinux is preventing /usr/lib/systemd/systemd-hostnamed from read access on the chr_file .

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

If you believe that systemd-hostnamed should be allowed read access on the  chr_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 systemd-hostnam /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:systemd_hostnamed_t:s0
Target Context                system_u:object_r:tmpfs_t:s0
Target Objects                 [ chr_file ]
Source                        systemd-hostnam
Source Path                   /usr/lib/systemd/systemd-hostnamed
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           systemd-212-4.fc21.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-50.fc21.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     localhost.localdomain
Platform                      Linux localhost.localdomain
                              3.15.0-0.rc4.git4.1.fc21.x86_64 #1 SMP Fri May 9
                              14:09:57 UTC 2014 x86_64 x86_64
Alert Count                   12
First Seen                    2014-04-27 23:26:20 PDT
Last Seen                     2014-05-11 14:30:24 PDT
Local ID                      47da2187-958b-4dcf-8d01-b9d8a6cabbc6

Raw Audit Messages
type=AVC msg=audit(1399843824.658:362): avc:  denied  { read } for  pid=13203 comm="systemd-hostnam" name="urandom" dev="tmpfs" ino=43758 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=chr_file


type=SYSCALL msg=audit(1399843824.658:362): arch=x86_64 syscall=open success=no exit=EACCES a0=7f14c5e77b09 a1=80100 a2=0 a3=0 items=0 ppid=1 pid=13203 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=systemd-hostnam exe=/usr/lib/systemd/systemd-hostnamed subj=system_u:system_r:systemd_hostnamed_t:s0 key=(null)

Hash: systemd-hostnam,systemd_hostnamed_t,tmpfs_t,chr_file,read
Comment 1 Lennart Poettering 2014-05-20 10:46:26 UTC 
hostnamed runs with PrivateDevices=yes. This has the effect that systemd mounts a private tmpfs instance into its namespace for /dev with /dev/null and /dev/urandom. Access to the latter is what you see here. Selinux should allow thatvreally.
Comment 2 Miroslav Grepl 2014-05-20 10:57:24 UTC 
See

https://bugzilla.redhat.com/show_bug.cgi?id=1081429#c6
Comment 3 Miroslav Grepl 2014-05-20 10:58:15 UTC 

*** This bug has been marked as a duplicate of bug 1081429 ***