Bug 529206

Summary:

SELinux is preventing fprintd (fprintd_t) "write" access to device /dev/null.

Detailed Description:

[SELinux is in permissive mode. This access was not denied.]

SELinux has denied the fprintd (fprintd_t) "write" access to device /dev/null.
/dev/null is mislabeled, this device has the default label of the /dev
directory, which should not happen. All Character and/or Block Devices should
have a label. You can attempt to change the label of the file using restorecon
-v '/dev/null'. If this device remains labeled device_t, then this is a bug in
SELinux policy. Please file a bug report
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against the selinux-policy
package. If you look at the other similar devices labels, ls -lZ /dev/SIMILAR,
and find a type that would work for /dev/null, you can use chcon -t SIMILAR_TYPE
'/dev/null', If this fixes the problem, you can make this permanent by executing
semanage fcontext -a -t SIMILAR_TYPE '/dev/null' If the restorecon changes the
context, this indicates that the application that created the device, created it
without using SELinux APIs. If you can figure out which application created the
device, please file a bug report
(http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against this application.

Allowing Access:

Attempt restorecon -v '/dev/null' or chcon -t SIMILAR_TYPE '/dev/null'

Additional Information:

Source Context                system_u:system_r:fprintd_t:s0-s0:c0.c1023
Target Context                system_u:object_r:device_t:s0
Target Objects                /dev/null [ chr_file ]
Source                        fprintd
Source Path                   /usr/libexec/fprintd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           fprintd-0.1-15.git04fd09cfa.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.12-82.fc11
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Permissive
Plugin Name                   device
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.32-0.14.rc0.git18.fc13.x86_64 #1 SMP Mon Sep
                              28 19:34:27 EDT 2009 x86_64 x86_64
Alert Count                   1
First Seen                    Sun 11 Oct 2009 02:12:38 BST
Last Seen                     Sun 11 Oct 2009 02:12:38 BST
Local ID                      62011d54-d0c5-4201-be3b-c80d14a70f82
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1255223558.2:1988): avc:  denied  { write } for  pid=5967 comm="fprintd" path="/dev/null" dev=tmpfs ino=10433 scontext=system_u:system_r:fprintd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:device_t:s0 tclass=chr_file

node=(removed) type=SYSCALL msg=audit(1255223558.2:1988): arch=c000003e syscall=1 success=yes exit=36 a0=2 a1=228e170 a2=24 a3=1 items=0 ppid=1 pid=5967 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="fprintd" exe="/usr/libexec/fprintd" subj=system_u:system_r:fprintd_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.12-82.fc11,device,fprintd,fprintd_t,device_t,chr_file,write
audit2allow suggests:

#============= fprintd_t ==============
allow fprintd_t device_t:chr_file write;