The following was filed automatically by setroubleshoot:

Summary:

Your system may be seriously compromised! /bin/dbus-daemon attempted to mmap low
kernel memory.

Detailed Description:

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

SELinux has denied the dbus-daemon the ability to mmap low area of the kernel
address space. The ability to mmap a low area of the address space, as
configured by /proc/sys/kernel/mmap_min_addr. Preventing such mappings helps
protect against exploiting null deref bugs in the kernel. All applications that
need this access should have already had policy written for them. If a
compromised application tries modify the kernel this AVC would be generated.
This is a serious issue. Your system may very well be compromised.

Allowing Access:

Contact your security administrator and report this issue.

Additional Information:

Source Context                system_u:system_r:system_dbusd_t:s0-s0:c0.c1023
Target Context                system_u:system_r:system_dbusd_t:s0-s0:c0.c1023
Target Objects                None [ memprotect ]
Source                        dbus-daemon
Source Path                   /bin/dbus-daemon
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           dbus-1.2.16-5.fc12
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-10.fc12
Selinux Enabled               True
Policy Type                   targeted
MLS Enabled                   True
Enforcing Mode                Permissive
Plugin Name                   mmap_zero
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31-0.204.rc9.fc12.x86_64 #1 SMP
                              Sat Sep 5 20:45:55 EDT 2009 x86_64 x86_64
Alert Count                   7
First Seen                    Tue 15 Sep 2009 09:18:34 PM EDT
Last Seen                     Sun 04 Oct 2009 07:28:40 PM EDT
Local ID                      3508b0ed-b548-4367-9844-2426ae9538b2
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1254698920.441:9): avc:  denied  { mmap_zero } for  pid=813 comm="dbus-daemon" scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tclass=memprotect

node=(removed) type=SYSCALL msg=audit(1254698920.441:9): arch=c000003e syscall=125 success=no exit=-14 a0=7fffb4884fd4 a1=0 a2=7fffb335ce80 a3=7fff41dc1240 items=0 ppid=1 pid=813 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="dbus-daemon" exe="/bin/dbus-daemon" subj=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 key=(null)


audit2allow suggests:

#============= system_dbusd_t ==============
allow system_dbusd_t self:memprotect mmap_zero;