X and SELinux on PowerPC

W. Michael Petullo mike at flyn.org
Tue Apr 13 13:12:09 UTC 2004


Has anyone had any luck with Fedora/SELinux on the PowerPC platform?
On my PowerPC-based system, x.org's server wishes to access /proc/sys/dev
(probably for mac_hid/mouse emulation) and /proc/bus/pci.  When I set
SELinux to enforce, these operations are blocked and X does not start.

Here are the relavent logs:

avc:  denied  { search } for  pid=1504 exe=/usr/X11R6/bin/XFree86 name=dev
+dev=
ino=5303 scontext=system_u:system_r:xdm_xserver_t
+tcontext=system_u:object_r:sysctl_dev_t tclass=dir

avc:  denied  { getattr } for  pid=1504 exe=/usr/X11R6/bin/XFree86
+path=/proc/bus/pci dev= ino=5458 scontext=system_u:system_r:xdm_xserver_t
+tcontext=system_u:object_r:proc_t tclass=dir

Perhaps x86's X server not touch these directories?  I assume this policy
works on x86 because I haven't seen any mention of this on fedora-dev
or -test.
                                                                                
Adding the following to xserver_macros.te gets X to load on PowerPC:
                                                                                
# Access /proc/bus/pci
allow $1_xserver_t proc_t:dir { getattr read };
                                                                                
However, I don't know if this is the correct way to do this.  I'm not
even sure exactly why X is trying to read from /proc/bus/pci.

-- 
Mike

:wq



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