Bug 541178

Summary:

SELinux is preventing /usr/bin/aticonfig from making the program stack
executable.

Detailed Description:

The aticonfig application attempted to make its stack executable. This is a
potential security problem. This should never ever be necessary. Stack memory is
not executable on most OSes these days and this will not change. Executable
stack memory is one of the biggest security problems. An execstack error might
in fact be most likely raised by malicious code. Applications 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. If aticonfig does not work and you need it to work,
you can configure SELinux temporarily to allow this access until the application
is fixed. Please file a bug report.

Allowing Access:

Sometimes a library is accidentally marked with the execstack flag, if you find
a library with this flag you can clear it with the execstack -c LIBRARY_PATH.
Then retry your application. If the app continues to not work, you can turn the
flag back on with execstack -s LIBRARY_PATH. Otherwise, if you trust aticonfig
to run correctly, you can change the context of the executable to
execmem_exec_t. "chcon -t execmem_exec_t '/usr/bin/aticonfig'" 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 execmem_exec_t
'/usr/bin/aticonfig'"

Fix Command:

chcon -t execmem_exec_t '/usr/bin/aticonfig'

Additional Information:

Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                None [ process ]
Source                        aticonfig
Source Path                   /usr/bin/aticonfig
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.6.32-46.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   allow_execstack
Host Name                     (removed)
Platform                      Linux (removed) 2.6.31.5-127.fc12.i686 #1 SMP Sat
                              Nov 7 21:41:45 EST 2009 i686 athlon
Alert Count                   10
First Seen                    Wed 25 Nov 2009 12:25:02 PM CST
Last Seen                     Wed 25 Nov 2009 02:04:41 PM CST
Local ID                      cc6dde02-01e0-4ac8-a838-0d8eb96d74a7
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1259129081.963:22948): avc:  denied  { execstack } for  pid=11005 comm="aticonfig" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process

node=(removed) type=SYSCALL msg=audit(1259129081.963:22948): arch=40000003 syscall=125 success=no exit=-13 a0=bfe81000 a1=1000 a2=1000007 a3=bfe80e2c items=0 ppid=5809 pid=11005 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="aticonfig" exe="/usr/bin/aticonfig" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  selinux-policy-3.6.32-46.fc12,allow_execstack,aticonfig,unconfined_t,unconfined_t,process,execstack
audit2allow suggests:

#============= unconfined_t ==============
allow unconfined_t self:process execstack;