Red Hat Bugzilla – Bug 1266328
SELinux is preventing gnome-session-c from read, write access on the semaphore Unknown.
Last modified: 2017-09-18 09:08:03 EDT
Description of problem: After installing Radeon Drivers for Fedora 22 computer would not boot. Disabled gdm and enabled lightdm per information found at "https://bluehatrecord.wordpress.com/2015/09/17/installing-the-proprietary-amd-catalyst-15-9-fglrx-15-201-driver-on-fedora-22-with-linux-kernel-4-1-6/#comment-1383" Fedora now boots but only using lightdm. If SELinux is disabled I am able to login no problem. SELinux is preventing gnome-session-c from read, write access on the semaphore Unknown. ***** Plugin catchall (100. confidence) suggests ************************** If you believe that gnome-session-c should be allowed read write access on the Unknown sem 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 gnome-session-c /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:xdm_t:s0-s0:c0.c1023 Target Context system_u:system_r:xserver_t:s0-s0:c0.c1023 Target Objects Unknown [ sem ] Source gnome-session-c Source Path gnome-session-c Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.13.1-128.13.fc22.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Permissive Host Name (removed) Platform Linux (removed) 4.1.6-201.fc22.x86_64 #1 SMP Fri Sep 4 17:49:24 UTC 2015 x86_64 x86_64 Alert Count 1 First Seen 2015-09-24 22:11:30 EDT Last Seen 2015-09-24 22:11:30 EDT Local ID d7144711-d029-4f45-a825-5d2424ed4a42 Raw Audit Messages type=AVC msg=audit(1443147090.267:576): avc: denied { read write } for pid=1529 comm="gnome-session-c" key=17908779 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:xserver_t:s0-s0:c0.c1023 tclass=sem permissive=1 Hash: gnome-session-c,xdm_t,xserver_t,sem,read,write Version-Release number of selected component: selinux-policy-3.13.1-128.13.fc22.noarch Additional info: reporter: libreport-2.6.2 hashmarkername: setroubleshoot kernel: 4.1.7-200.fc22.x86_64 type: libreport
If you add a local policy # grep gnome-session /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Does it work in enforcing mode?
Any update here?
Closing as insufficient data. Please re-open this issue when this happens again.
Selinux exception fixed the issue.