Bug 987052 - SELinux is preventing /usr/sbin/zebra from 'read' accesses on the chr_file random.
SELinux is preventing /usr/sbin/zebra from 'read' accesses on the chr_file ra...
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
x86_64 Unspecified
unspecified Severity unspecified
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Assigned To: Miroslav Grepl
Fedora Extras Quality Assurance
Depends On:
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Reported: 2013-07-22 11:34 EDT by Richard W.M. Jones
Modified: 2013-07-26 19:06 EDT (History)
3 users (show)

See Also:
Fixed In Version: selinux-policy-3.12.1-66.fc19
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2013-07-26 19:06:50 EDT
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Regression: ---
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Verified Versions:
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Richard W.M. Jones 2013-07-22 11:34:43 EDT
Description of problem:
zebra appears to want to access /dev/random, and this generates AVCs.
SELinux is preventing /usr/sbin/zebra from 'read' accesses on the chr_file random.

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

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

Additional Information:
Source Context                system_u:system_r:zebra_t:s0
Target Context                system_u:object_r:random_device_t:s0
Target Objects                random [ chr_file ]
Source                        zebra
Source Path                   /usr/sbin/zebra
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           quagga-
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-65.fc19.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.9.9-302.fc19.x86_64 #1 SMP Sat
                              Jul 6 13:41:07 UTC 2013 x86_64 x86_64
Alert Count                   3
First Seen                    2013-07-21 11:44:13 BST
Last Seen                     2013-07-22 16:30:24 BST
Local ID                      263cebce-16c7-4053-b738-197bfb69c353

Raw Audit Messages
type=AVC msg=audit(1374507024.71:2271): avc:  denied  { read } for  pid=31091 comm="ripd" name="random" dev="devtmpfs" ino=6728 scontext=system_u:system_r:zebra_t:s0 tcontext=system_u:object_r:random_device_t:s0 tclass=chr_file

type=SYSCALL msg=audit(1374507024.71:2271): arch=x86_64 syscall=open success=no exit=EACCES a0=7f00f8312c1b a1=900 a2=7973 a3=7fff6d190c90 items=0 ppid=1 pid=31091 auid=4294967295 uid=92 gid=92 euid=92 suid=92 fsuid=92 egid=92 sgid=92 fsgid=92 ses=4294967295 tty=(none) comm=ripd exe=/usr/sbin/ripd subj=system_u:system_r:zebra_t:s0 key=(null)

Hash: zebra,zebra_t,random_device_t,chr_file,read

Additional info:
reporter:       libreport-2.1.5
hashmarkername: setroubleshoot
kernel:         3.9.9-302.fc19.x86_64
type:           libreport
Comment 1 Richard W.M. Jones 2013-07-22 11:37:33 EDT
It appears to be a legit access.  From the quagga source:

$ find -type f | xargs grep /dev/urandom
./babeld/kernel.c:/* If /dev/urandom doesn't exist, this will fail with ENOENT, which the
./babeld/kernel.c:    fd = open("/dev/urandom", O_RDONLY);
Comment 2 Daniel Walsh 2013-07-22 15:34:19 EDT
34016c775003530181c93c9efdad0173953b13f6 fixes this in git.
Comment 3 Fedora Update System 2013-07-24 10:14:12 EDT
selinux-policy-3.12.1-66.fc19 has been submitted as an update for Fedora 19.
Comment 4 Fedora Update System 2013-07-24 20:36:04 EDT
Package selinux-policy-3.12.1-66.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing selinux-policy-3.12.1-66.fc19'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
Comment 5 Fedora Update System 2013-07-26 19:06:50 EDT
selinux-policy-3.12.1-66.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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