Summary: SELinux is preventing /usr/lib/firefox-4.0/firefox-bin from loading /usr/lib/firefox-4.0/libxul.so which requires text relocation. Detailed Description: The firefox-bin application attempted to load /usr/lib/firefox-4.0/libxul.so which requires text relocation. This is a potential security problem. Most libraries do not need this permission. Libraries 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. You can configure SELinux temporarily to allow /usr/lib/firefox-4.0/libxul.so to use relocation as a workaround, until the library is fixed. Please file a bug report. Allowing Access: If you trust /usr/lib/firefox-4.0/libxul.so to run correctly, you can change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t '/usr/lib/firefox-4.0/libxul.so'" 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 textrel_shlib_t '/usr/lib/firefox-4.0/libxul.so'" Fix Command: chcon -t textrel_shlib_t '/usr/lib/firefox-4.0/libxul.so' Additional Information: Source Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Context system_u:object_r:lib_t:s0 Target Objects /usr/lib/firefox-4.0/libxul.so [ file ] Source firefox-bin Source Path /usr/lib/firefox-4.0/firefox-bin Port <Unknown> Host (removed) Source RPM Packages firefox4-4.0-0.2.beta2.fc13.remi Target RPM Packages firefox4-4.0-0.2.beta2.fc13.remi Policy RPM selinux-policy-3.7.19-44.fc13 Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Plugin Name allow_execmod Host Name (removed) Platform Linux (removed) 2.6.33.6-147.2.4.fc13.i686.PAE #1 SMP Fri Jul 23 17:21:06 UTC 2010 i686 i686 Alert Count 3 First Seen Thu 12 Aug 2010 10:14:29 PM IST Last Seen Thu 12 Aug 2010 10:15:36 PM IST Local ID 13f2f5f9-4ea2-4656-b566-e0505b20f220 Line Numbers Raw Audit Messages node=(removed) type=AVC msg=audit(1281631536.111:28344): avc: denied { execmod } for pid=2680 comm="firefox-bin" path="/usr/lib/firefox-4.0/libxul.so" dev=dm-0 ino=1046807 scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file node=(removed) type=SYSCALL msg=audit(1281631536.111:28344): arch=40000003 syscall=125 success=no exit=-13 a0=f42000 a1=12c6000 a2=5 a3=bfa25560 items=0 ppid=1 pid=2680 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=(none) ses=1 comm="firefox-bin" exe="/usr/lib/firefox-4.0/firefox-bin" subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null) Hash String generated from allow_execmod,firefox-bin,unconfined_t,lib_t,file,execmod audit2allow suggests: #============= unconfined_t ============== #!!!! This avc can be allowed using the boolean 'allow_execmod' allow unconfined_t lib_t:file execmod;
/usr/lib/firefox-4.0/libxul.so is built incorrectly. Either use the chcon command mentioned in the alert or turn off the check altogether.