Bug 547632

Summary:

SELinux is preventing /opt/lampp/bin/php-5.3.0 from loading
/opt/lampp/lib/libct.so.3.0.0 which requires text relocation.

Detailed Description:

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

The php application attempted to load /opt/lampp/lib/libct.so.3.0.0 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
/opt/lampp/lib/libct.so.3.0.0 to use relocation as a workaround, until the
library is fixed. Please file a bug report.

Allowing Access:

If you trust /opt/lampp/lib/libct.so.3.0.0 to run correctly, you can change the
file context to textrel_shlib_t. "chcon -t textrel_shlib_t
'/opt/lampp/lib/libct.so.3.0.0'" 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 '/opt/lampp/lib/libct.so.3.0.0'"

Fix Command:

chcon -t textrel_shlib_t '/opt/lampp/lib/libct.so.3.0.0'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_execmem_t:s0-
                              s0:c0.c1023
Target Context                system_u:object_r:lib_t:s0
Target Objects                /opt/lampp/lib/libct.so.3.0.0 [ file ]
Source                        php
Source Path                   /opt/lampp/bin/php-5.3.0
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-55.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Plugin Name                   allow_execmod
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.31.6-166.fc12.x86_64 #1 SMP Wed Dec 9 10:46:22
                              EST 2009 x86_64 x86_64
Alert Count                   3
First Seen                    Tue 15 Dec 2009 12:16:22 PM IRST
Last Seen                     Tue 15 Dec 2009 12:22:04 PM IRST
Local ID                      672151a8-253b-45ea-ae15-e978d26c6a67
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1260867124.922:99): avc:  denied  { execmod } for  pid=3945 comm="php" path="/opt/lampp/lib/libct.so.3.0.0" dev=sda7 ino=167706 scontext=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1260867124.922:99): arch=40000003 syscall=125 success=yes exit=0 a0=215000 a1=55000 a2=5 a3=ffae1160 items=0 ppid=3944 pid=3945 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="php" exe="/opt/lampp/bin/php-5.3.0" subj=unconfined_u:unconfined_r:unconfined_execmem_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-55.fc12,allow_execmod,php,unconfined_execmem_t,lib_t,file,execmod
audit2allow suggests:

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