avc_has_perm_noaudit crashes process after switching enforcing modes

[Daniel J Walsh]

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On 05/21/2013 11:53 AM, Steve Ross wrote:
> Subscribers,
> 
> I'm a newbie.  I hope that my question is appropriate for this forum.
> 
> I'm using "libselinux-2.094-5.2.el6.i686" from CentOS 6.2 on a system.  In 
> particular, I'm using a call to "avc_has_perm_noaudit()".  When SELinux is
> in Enforcing mode, all is well and calls to the function return the correct
> value of zero or -1.  However, as the program runs, when I externally
> (i.e., outside of the program's code, using "setenforce") switch from
> Enforcing to Permissive, the next call to "avc_has_perm_noaudit()" crashes
> the program.  I would expect the function to always return a zero in
> Permissive mode and not crash.
> 
> I've also seen that the call crashes my program if the system is in
> Enforcing, I switch it to Permissive (but avoid calling
> "avc_has_perm_noaudit()" by use of "security_getenforce()") and then switch
> back to Enforcing and call the function.
> 
> Is it appropriate to call "avc_has_perm_noaudit()" after externally
> switching enforcing modes?  Is this crashing a known issue?  Is it fixed in
> a later release?  (I've haven't tried any of the updated releases listed
> at <http://userspace.selinuxproject.org/trac/wiki/Releases>.)
> 
> Thanks in advance for any help, -- Steve Ross
> 
> 
> -- selinux mailing list selinux at lists.fedoraproject.org 
> https://admin.fedoraproject.org/mailman/listinfo/selinux
> 

Sounds like a bug, can you write a reproducer and the send in the code, or
open a bugzilla/service request.
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