Bug 542960

Summary:

SELinux is preventing /tmp/air.45C9Zc/setup from making the program stack
executable.

Detailed Description:

The setup 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 setup 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 setup to
run correctly, you can change the context of the executable to execmem_exec_t.
"chcon -t execmem_exec_t '/tmp/air.45C9Zc/setup'" 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 '/tmp/air.45C9Zc/setup'"

Fix Command:

chcon -t execmem_exec_t '/tmp/air.45C9Zc/setup'

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                        AptanaRadRails
Source Path                   /home/ben/builds/Aptana RadRails/AptanaRadRails
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 i686
Alert Count                   7
First Seen                    Wed 25 Nov 2009 11:36:26 PM PST
Last Seen                     Tue 01 Dec 2009 02:26:43 AM PST
Local ID                      9976e921-0407-4c81-b708-b7a3e0b9c61e
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1259663203.339:34): avc:  denied  { execstack } for  pid=2743 comm="setup" 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(1259663203.339:34): arch=40000003 syscall=125 success=no exit=-13 a0=bfd80000 a1=1000 a2=1000007 a3=bfd7fb98 items=0 ppid=2741 pid=2743 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="setup" exe="/tmp/air.45C9Zc/setup" 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,AptanaRadRails,unconfined_t,unconfined_t,process,execstack
audit2allow suggests:

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