Red Hat Bugzilla – Bug 836692
SELinux is preventing /usr/libexec/gstreamer-0.10/gst-plugin-scanner from 'execmod' accesses on the file /usr/lib64/libzvbi.so.0.13.1.
Last modified: 2012-10-11 05:37:04 EDT
libreport version: 2.0.10 executable: /usr/bin/python2.7 hashmarkername: setroubleshoot kernel: 3.4.3-1.fc17.x86_64 time: 2012. jún. 30., szombat, 02.30.39 CEST description: :SELinux is preventing /usr/libexec/gstreamer-0.10/gst-plugin-scanner from 'execmod' accesses on the file /usr/lib64/libzvbi.so.0.13.1. : :***** Plugin restorecon (99.5 confidence) suggests ************************* : :If you want to fix the label. :/usr/lib64/libzvbi.so.0.13.1 default label should be textrel_shlib_t. :Then you can run restorecon. :Do :# /sbin/restorecon -v /usr/lib64/libzvbi.so.0.13.1 : :***** Plugin catchall (1.49 confidence) suggests *************************** : :If you believe that gst-plugin-scanner should be allowed execmod access on the libzvbi.so.0.13.1 file by default. :Then you should report this as a bug. :You can generate a local policy module to allow this access. :Do :allow this access for now by executing: :# grep gst-plugin-scan /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :Additional Information: :Source Context unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c : 0.c1023 :Target Context system_u:object_r:lib_t:s0 :Target Objects /usr/lib64/libzvbi.so.0.13.1 [ file ] :Source gst-plugin-scan :Source Path /usr/libexec/gstreamer-0.10/gst-plugin-scanner :Port <Ismeretlen> :Host (removed) :Source RPM Packages gstreamer-0.10.36-1.fc17.x86_64 :Target RPM Packages zvbi-0.2.33-12.fc17.x86_64 :Policy RPM selinux-policy-3.10.0-132.fc17.noarch :Selinux Enabled True :Policy Type targeted :Enforcing Mode Enforcing :Host Name (removed) :Platform Linux (removed) 3.4.3-1.fc17.x86_64 #1 : SMP Mon Jun 18 19:53:17 UTC 2012 x86_64 x86_64 :Alert Count 1 :First Seen 2012. jún. 30., szombat, 02.29.36 CEST :Last Seen 2012. jún. 30., szombat, 02.29.36 CEST :Local ID 22da95de-ba06-46e5-afab-2fec22bc5212 : :Raw Audit Messages :type=AVC msg=audit(1341016176.152:133): avc: denied { execmod } for pid=3176 comm="gst-plugin-scan" path="/usr/lib64/libzvbi.so.0.13.1" dev="dm-1" ino=798695 scontext=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=file : : :type=SYSCALL msg=audit(1341016176.152:133): arch=x86_64 syscall=mprotect success=no exit=EACCES a0=7fbbbff6d000 a1=70000 a2=5 a3=0 items=0 ppid=3171 pid=3176 auid=1000 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=2 comm=gst-plugin-scan exe=/usr/libexec/gstreamer-0.10/gst-plugin-scanner subj=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 key=(null) : :Hash: gst-plugin-scan,mozilla_plugin_t,lib_t,file,execmod : :audit2allowunable to open /sys/fs/selinux/policy: Permission denied : : :audit2allow -Runable to open /sys/fs/selinux/policy: Permission denied : :
Do: # /sbin/restorecon -v /usr/lib64/libzvbi.so.0.13.1
From a user point of view, having to run the command is not so great. From my point of view, before asking me to enable a plugin to run code, you should explain why it is needed. And if needed why it wasn't already enabled ? is it a bug in the security policy, a bug in the zvbi package ?.
This is happening because /usr/lib64/libzvbi.so.0.13.1 was built without the PIC flag, I guess we can reopen this bug with them, but I am not sure how the file installed with the incorrect label.
Thanks for the clarification. I've also found explanations in bug #831595 Does a bug against libzvbi might be opened to ask for a rebuilt with PIC flag instead of using a modified SELinux policy ?