Red Hat Bugzilla – Bug 191054
ati drivers from livna breaks metacity with kernel 2111
Last modified: 2007-11-30 17:11:32 EST
Description of problem: The proprietary ati driver distributed by livna installs it's own libGL that metacity (among others) links to dynamically. When trying to start metacity i got the following error /usr/bin/metacity: error while loading shared libraries: /usr/lib/ati-fglrx/libGL.so.1: cannot restore segment prot after reloc: Permission denied and the following in the syslog May 8 17:09:17 mandy kernel: audit(1147100957.387:8): avc: denied { execmod } for pid=2491 comm="metacity" name="libGL.so.1.2" dev=dm-0 ino=3788268 scontext=system_u:system_r:unconfined_t:s0 tcontext=system_u:object_r:lib_t:s0 tclass=file After calling '/usr/sbin/setenforce 0' metacity works as expected Version-Release number of selected component (if applicable): kernel-2.6.16-1.2111_FC5 selinux-policy-targeted-2.2.34-3.fc5 xorg-x11-drv-fglrx-8.24.8-1.lvn5 How reproducible: always Steps to Reproduce: 1. install kmod-fglrx 2. reboot 3. login with filsafe xterm 4. Try to start gnome by running 'gnome-session' Actual results: The above error message Expected results: Starting metacity (and gnome) Additional info: I understand that making FC work with proprietary software is not a top priority, but I think this is important nevertheless as so many people have hardware that leaves them no choice but to use the proprietary drivers
Fixed in selinux-policy-targeted-2.2.38-1.fc5 Although it would be good to point this bug out to ati, along with this link to explain the problem. http://people.redhat.com/~drepper/selinux-mem.html
Thanks for the fix. By the way, the original coding problem seems to be present in mesa also, and is reported as https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=191191 In an ideal world the magicians of selinux and mprotect() over at redhat will provide a patch for the mesa library that is transferred to the ati team in about ten minutes. Then we can remove this privilege :)
(In reply to comment #2) > Thanks for the fix. Dito. But it is not yet fully complete -- the file /usr/lib(64)?/xorg/modules/dri/fglrx_dri\.so also needs the context system_u:object_r:textrel_shlib_t:s0 to make DRI work properly with the fglrx drivers; otherwise this will show up: type=AVC msg=audit(1147239914.540:34): avc: denied { execmod } for pid=3103 comm="fgl_glxgears" name="fglrx_dri.so" dev=hda5 ino=262940 scontext=user_u:system_r:unconfined_t:s0 tcontext=system_u:object_r:lib_t:s0 tclass=file
Ohh, just tested on a diffenrent machine with a fresh install with updated selinux policy -- the driver itself /usr/lib(64)?/xorg/modules/drivers/fglrx_drv\.so also needs the context system_u:object_r:textrel_shlib_t:s0 to let X start on that machine -- that was not neccessary on the other machine I tested. Otherwise this will show up audit(1147242608.396:6): avc: denied { execmod } for pid=2519 comm="Xorg" name="fglrx_drv.so" dev=sda6 ino=1047789 scontext=system_u:system_r:xdm_t:s0-s0:c0.c255 tcontext=system_u:object_r:lib_t:s0 tclass=file and X will complain with (II) Loading /usr/lib/xorg/modules/drivers/fglrx_drv.so dlopen: /usr/lib/xorg/modules/drivers/fglrx_drv.so: cannot restore segment prot after reloc: Permission denied (EE) Failed to load /usr/lib/xorg/modules/drivers/fglrx_drv.so (EE) No drivers available.
Fixed in selinux-policy-2.2.47-3
I'm using selinx-policy-2.2.47-3, and I'm still having this problem. Moreover, I do not have the livna kmod-fglrx package installed. Basically, when I try to log into gnome, the system hangs on the splash screen, and I have to hit ctl-atl-backspace to return to the login screen. I can log into KDE normally, and when I try to run metacity from the command line, I get the following message: $ metacity metacity: error while loading shared libraries: /usr/lib/libGL.so.1: cannot restore segment prot after reloc: Permission denied The only way I can log into gnome is to do a setenforce 0. Thus, I'm almost certain that I'm experiencing the same bug, and it does not seem to be fixed in selinux-policy-2.2.47-3 on my system.
Check the file context ls -lZ /usr/lib/libGL.so.1* lrwxrwxrwx root root system_u:object_r:lib_t /usr/lib/libGL.so.1 -> libGL.so.1.2 -rwxr-xr-x root root system_u:object_r:textrel_shlib_t /usr/lib/libGL.so.1.2 To fix restorecon -R -v /usr/lib
That fixed the problem. Thanks.