Zusammenfassung:

SELinux is preventing
/home/andi/opera-10.20-4744.gcc4-bundled-qt4.x86_64/usr/lib/opera/works from
making the program stack executable.

Detaillierte Beschreibung:

The works 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 works 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.

Zugriff erlauben:

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 works to
run correctly, you can change the context of the executable to execmem_exec_t.
"chcon -t execmem_exec_t
'/home/andi/opera-10.20-4744.gcc4-bundled-qt4.x86_64/usr/lib/opera/works'" 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
'/home/andi/opera-10.20-4744.gcc4-bundled-qt4.x86_64/usr/lib/opera/works'"

Fixer Befehl:

chcon -t execmem_exec_t
'/home/andi/opera-10.20-4744.gcc4-bundled-qt4.x86_64/usr/lib/opera/works'

Zusätzliche Informationen:

Quellkontext                  unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Zielkontext                   unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Zielobjekte                   None [ process ]
Quelle                        works
Quellen-Pfad                  /home/andi/opera-10.10-4742.gcc4-shared-
                              qt3.x86_64/usr/lib/opera/works
Port                          <Unbekannt>
Host                          (removed)
Quellen-RPM-Pakete            
Ziel-RPM-Pakete               
RPM-Richtlinie                selinux-policy-3.6.32-46.fc12
SELinux aktiviert             True
Richtlinienversion            targeted
Enforcing-Modus               Enforcing
Plugin-Name                   allow_execstack
Hostname                      (removed)
Plattform                     Linux (removed) 2.6.31.5-127.fc12.x86_64 #1 SMP Sat
                              Nov 7 21:11:14 EST 2009 x86_64 x86_64
Anzahl der Alarme             20
Zuerst gesehen                Mo 23 Nov 2009 20:10:59 CET
Zuletzt gesehen               Do 26 Nov 2009 15:14:18 CET
Lokale ID                     3ea8d062-90f6-484e-953e-c4093d027ebc
Zeilennummern                 

Raw-Audit-Meldungen           

node=(removed) type=AVC msg=audit(1259244858.569:18750): avc:  denied  { execstack } for  pid=2121 comm="works" 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(1259244858.569:18750): arch=c000003e syscall=10 success=no exit=-13 a0=7fff449e5000 a1=1000 a2=1000007 a3=38d0a19aeb items=0 ppid=2120 pid=2121 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="works" exe="/home/andi/opera-10.20-4744.gcc4-bundled-qt4.x86_64/usr/lib/opera/works" 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,works,unconfined_t,unconfined_t,process,execstack
audit2allow suggests:

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