Summary:

SELinux is preventing /sbin/shutdown "signull" access .

Detailed Description:

[shutdown has a permissive type (shutdown_t). This access was not denied.]

SELinux denied access requested by shutdown. It is not expected that this access
is required by shutdown 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://docs.fedoraproject.org/selinux-faq-fc5/#id2961385) Please file a bug
report.

Additional Information:

Source Context                system_u:system_r:shutdown_t:s0-s0:c0.c1023
Target Context                unconfined_u:unconfined_r:shutdown_t:s0-s0:c0.c102
                              3
Target Objects                None [ process ]
Source                        shutdown
Source Path                   /sbin/shutdown
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           upstart-0.6.5-3.fc13
Target RPM Packages           
Policy RPM                    selinux-policy-3.7.19-6.fc13
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   catchall
Host Name                     (removed)
Platform                      Linux (removed) 2.6.33.2-57.fc13.i686.PAE #1 SMP Tue
                              Apr 20 08:58:17 UTC 2010 i686 i686
Alert Count                   2
First Seen                    Fri 30 Apr 2010 01:23:19 AM UZT
Last Seen                     Fri 30 Apr 2010 01:23:48 AM UZT
Local ID                      9ea610e8-8581-4c27-8210-6238ff61f4e1
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1272572628.924:21630): avc:  denied  { signull } for  pid=5896 comm="shutdown" scontext=system_u:system_r:shutdown_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:shutdown_t:s0-s0:c0.c1023 tclass=process

node=(removed) type=SYSCALL msg=audit(1272572628.924:21630): arch=40000003 syscall=37 success=yes exit=0 a0=1391 a1=0 a2=8f33394 a3=8f33390 items=0 ppid=5895 pid=5896 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="shutdown" exe="/sbin/shutdown" subj=system_u:system_r:shutdown_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  catchall,shutdown,shutdown_t,shutdown_t,process,signull
audit2allow suggests:

#============= shutdown_t ==============
allow shutdown_t self:process signull;