Sumário: SELinux is preventing /usr/libexec/kde4/kscreenlocker from making the program stack executable. Descrição detalhada: [SElinux está em modo permissivo. Esse acesso não foi negado.] The kscreenlocker 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 kscreenlocker 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. Permitindo acesso: 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 kscreenlocker to run correctly, you can change the context of the executable to execmem_exec_t. "chcon -t execmem_exec_t '/usr/libexec/kde4/kscreenlocker'" 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/libexec/kde4/kscreenlocker'" Comando de correção: chcon -t execmem_exec_t '/usr/libexec/kde4/kscreenlocker' Informações adicionais: Contexto de origem unconfined_u:unconfined_r:unconfined_t:s0 Contexto de destino unconfined_u:unconfined_r:unconfined_t:s0 Objetos de destino None [ process ] Origem ksmserver Caminho da origem /usr/bin/ksmserver Porta <Desconhecido> Máquina (removed) Pacotes RPM de origem kdebase-workspace-4.3.2-1.fc12 Pacotes RPM de destino RPM da política selinux-policy-3.6.32-46.fc12 Selinux habilitado True Tipo de política targeted Modo reforçado Permissive Nome do plugin allow_execstack Nome da máquina (removed) Plataforma Linux (removed) 2.6.31.6-134.fc12.i686 #1 SMP Mon Nov 16 21:09:17 EST 2009 i686 i686 Contador de alertas 4 Visto pela primeira vez em Qua 25 Nov 2009 08:34:06 BRST Visto pela última vez em Qua 25 Nov 2009 12:28:58 BRST ID local d510eac0-451e-482e-a8cf-01534e9de86d Números de linha Mensagens de auditoria não p node=(removed) type=AVC msg=audit(1259159338.616:288): avc: denied { execstack } for pid=25058 comm="kscreenlocker" scontext=unconfined_u:unconfined_r:unconfined_t:s0 tcontext=unconfined_u:unconfined_r:unconfined_t:s0 tclass=process node=(removed) type=SYSCALL msg=audit(1259159338.616:288): arch=40000003 syscall=125 success=yes exit=0 a0=bfb45000 a1=1000 a2=1000007 a3=bfb458f8 items=0 ppid=2434 pid=25058 auid=1005 uid=1005 gid=1005 euid=1005 suid=1005 fsuid=1005 egid=1005 sgid=1005 fsgid=1005 tty=(none) ses=1 comm="kscreenlocker" exe="/usr/libexec/kde4/kscreenlocker" subj=unconfined_u:unconfined_r:unconfined_t:s0 key=(null) Hash String generated from selinux-policy-3.6.32-46.fc12,allow_execstack,ksmserver,unconfined_t,unconfined_t,process,execstack audit2allow suggests: #============= unconfined_t ============== allow unconfined_t self:process execstack;
*** This bug has been marked as a duplicate of bug 533987 ***