Summary:

SELinux is preventing who (xdm_t) "signull" unconfined_t.

Detailed Description:

SELinux denied access requested by who. It is not expected that this access is
required by who and this access may signal an intrusion attempt. It is also
possible that the specific version or configuration of the application is
causing it to require additional access.

Allowing Access:

You can generate a local policy module to allow this access - see FAQ
(http://fedora.redhat.com/docs/selinux-faq-fc5/#id2961385) Or you can disable
SELinux protection altogether. Disabling SELinux protection is not recommended.
Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi)
against this package.

Additional Information:

Source Context                system_u:system_r:xdm_t:s0-s0:c0.c1023
Target Context                unconfined_u:unconfined_r:unconfined_t:s0
Target Objects                None [ process ]
Source                        who
Source Path                   /usr/bin/who
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           coreutils-6.12-20.fc10
Target RPM Packages           
Policy RPM                    selinux-policy-3.5.13-57.fc10
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   catchall
Host Name                     (removed)
Platform                      Linux (removed) 2.6.27.21-170.2.56.fc10.i686
                              #1 SMP Mon Mar 23 23:37:54 EDT 2009 i686 i686
Alert Count                   33
First Seen                    Wed 14 Jan 2009 06:41:52 PM GMT
Last Seen                     Mon 04 May 2009 04:44:17 PM BST
Local ID                      63e48627-1838-405c-a391-1e9d31fe824a
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1241451857.482:562): avc:  denied  { signull } for  pid=16671 comm="who" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0 tclass=process

node=(removed) type=SYSCALL msg=audit(1241451857.482:562): arch=40000003 syscall=37 success=no exit=-13 a0=e7d a1=0 a2=8052330 a3=9e1e038 items=0 ppid=16670 pid=16671 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="who" exe="/usr/bin/who" subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.5.13-57.fc10,catchall,who,xdm_t,unconfined_t,process,signull
audit2allow suggests:

#============= xdm_t ==============
allow xdm_t unconfined_t:process signull;