Re: SELinux Reset

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On Thu, 2009-08-06 at 15:21 -0700, Peter Joseph wrote:
> While experimenting with SELinux, I finally managed to lock myself out of the
> system.  The only way to get back in, I had to add "selinux=0" to the end of
> the kernel line.
> Now, if I run in a permissive mode the following message appears when I try
> to log in:
> 
> "Could not connect to session bus: An SELinux policy prevents this sender
> from sending this message to this recipient (rejected message had sender
> "(unset)" interface "org.freedesktop.DBus" member "Hello" error name
> "(unset)" destination "org.freedesktop.DBus)."
> 
> I am forced to go back to the grub prompt and disable SELinux again, in
> order to get in.  What is the best way to reset SEL to its original state?

Boot with enforcing=0 to come up in permissive mode (i.e. stay enabled,
log any denials that would occur, but don't enforce them).

Then look for avc denial messages in /var/log/messages
or /var/log/audit/audit.log.  Those will help indicate what it is going
wrong and what needs to be fixed.

-- 
Stephen Smalley
National Security Agency

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