Bug 548717

Summary:

SELinux is preventing /usr/local/mpeg123/bin/mpg123 from loading
/usr/local/mpeg123/lib/libmpg123.so.0.22.1 which requires text relocation.

Detailed Description:

The mpg123 application attempted to load
/usr/local/mpeg123/lib/libmpg123.so.0.22.1 which requires text relocation. This
is a potential security problem. Most libraries do not need this permission.
Libraries are sometimes coded incorrectly and request this permission. The
SELinux Memory Protection Tests
(http://people.redhat.com/drepper/selinux-mem.html) web page explains how to
remove this requirement. You can configure SELinux temporarily to allow
/usr/local/mpeg123/lib/libmpg123.so.0.22.1 to use relocation as a workaround,
until the library is fixed. Please file a bug report.

Allowing Access:

If you trust /usr/local/mpeg123/lib/libmpg123.so.0.22.1 to run correctly, you
can change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t
'/usr/local/mpeg123/lib/libmpg123.so.0.22.1'" You must also change the default
file context files on the system in order to preserve them even on a full
relabel. "semanage fcontext -a -t textrel_shlib_t
'/usr/local/mpeg123/lib/libmpg123.so.0.22.1'"

Fix Command:

chcon -t textrel_shlib_t '/usr/local/mpeg123/lib/libmpg123.so.0.22.1'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                system_u:object_r:lib_t:s0
Target Objects                /usr/local/mpeg123/lib/libmpg123.so.0.22.1 [ file
                              ]
Source                        mpg123
Source Path                   /usr/local/mpeg123/bin/mpg123
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-56.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.6-166.fc12.i686.PAE #1 SMP Wed
                              Dec 9 11:00:30 EST 2009 i686 i686
Alert Count                   2
First Seen                    Fri 18 Dec 2009 06:04:02 AM EST
Last Seen                     Fri 18 Dec 2009 06:06:19 AM EST
Local ID                      4c9b0488-b15a-4d54-a7cd-67c0e9768140
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1261134379.656:416): avc:  denied  { execmod } for  pid=15680 comm="mpg123" path="/usr/local/mpeg123/lib/libmpg123.so.0.22.1" dev=sda5 ino=282150 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1261134379.656:416): arch=40000003 syscall=125 success=no exit=-13 a0=110000 a1=4a000 a2=5 a3=bfda21d0 items=0 ppid=1 pid=15680 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="mpg123" exe="/usr/local/mpeg123/bin/mpg123" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-56.fc12,allow_execmod,mpg123,unconfined_t,lib_t,file,execmod
audit2allow suggests:

#============= unconfined_t ==============
allow unconfined_t lib_t:file execmod;