Summary:

SELinux is preventing /bin/umount "unlink" access on mtab.

Detailed Description:

SELinux denied access requested by umount. It is not expected that this access
is required by umount 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:mount_t:s0-s0:c0.c1023
Target Context                unconfined_u:object_r:etc_t:s0
Target Objects                mtab [ file ]
Source                        umount
Source Path                   /bin/umount
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           util-linux-ng-2.18-4.fc14
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.5-7.fc14
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   catchall
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.35.4-28.fc14.x86_64 #1 SMP Wed Sep 15 01:56:54
                              UTC 2010 x86_64 x86_64
Alert Count                   1
First Seen                    Tue 28 Sep 2010 07:58:47 AM MDT
Last Seen                     Tue 28 Sep 2010 07:58:47 AM MDT
Local ID                      69d8447f-1508-47c6-8443-07c5afefa900
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1285682327.535:27131): avc:  denied  { unlink } for  pid=3646 comm="umount" name="mtab" dev=dm-0 ino=253638 scontext=system_u:system_r:mount_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:etc_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1285682327.535:27131): arch=c000003e syscall=82 success=no exit=-13 a0=7f2260e84a0b a1=7f2260e84959 a2=7f2262244560 a3=7fff513538d0 items=0 ppid=2024 pid=3646 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="umount" exe="/bin/umount" subj=system_u:system_r:mount_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  catchall,umount,mount_t,etc_t,file,unlink
audit2allow suggests:

#============= mount_t ==============
allow mount_t etc_t:file unlink;