Summary: SELinux is preventing /usr/bin/python from making the program stack executable. Detailed Description: The python 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 python 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 python to run correctly, you can change the context of the executable to execmem_exec_t. "chcon -t execmem_exec_t '/usr/bin/python'" 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/python'" Fix Command: chcon -t execmem_exec_t '/usr/bin/python' 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 python Source Path /usr/bin/python Port <Unknown> Host (removed) Source RPM Packages python-2.6.2-2.fc12 Target RPM Packages Policy RPM selinux-policy-3.6.32-41.fc12 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name allow_execstack Host Name (removed) Platform Linux (removed) 2.6.31.5-122.fc12.i686 #1 SMP Thu Nov 5 02:08:26 EST 2009 i686 i686 Alert Count 2 First Seen Mon 09 Nov 2009 05:05:17 PM CET Last Seen Mon 09 Nov 2009 05:05:17 PM CET Local ID 75b62899-e172-45af-934c-ab70edbbfd18 Line Numbers Raw Audit Messages node=(removed) type=AVC msg=audit(1257782717.197:21812): avc: denied { execstack } for pid=9293 comm="python" 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(1257782717.197:21812): arch=40000003 syscall=125 per=400000 success=no exit=-13 a0=bff46000 a1=1000 a2=1000007 a3=bff3e840 items=0 ppid=9237 pid=9293 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="python" exe="/usr/bin/python" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) Hash String generated from selinux-policy-3.6.32-41.fc12,allow_execstack,python,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 ***