Re: selinux denial not appearing in logs

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On Thu, Dec 29, 2011 at 12:15:46AM +0000, Paul Howarth wrote:
> On Wed, 28 Dec 2011 18:04:30 -0500
> Edward Ned Harvey <selinuxadmin@xxxxxxxxxxxxxxx> wrote:
> 
> > How can this happen?  It's getting denied, but not appearing in
> > either the audit log or the messages file.  Running Centos 6 fully
> > updated, php (drupal) inside of httpd tries to send mail via postfix
> > (postdrop).  
> > 
> >  
> > 
> > When I have setenforce 0, the mail goes through.  No errors in any
> > logs (audit.log, error_log, messages)
> > 
> > When I have setenforce 1, the mail gets blocked.  I get this message
> > in httpd error_log:
> > 
> >                 sendmail: fatal: execvp /usr/sbin/postdrop: Permission
> > denied
> > 
> > sendmail: warning: command "/usr/sbin/postdrop -r" exited with status
> > 1
> > 
> > sendmail: fatal: email@xxxxxxxxxxx(48): unable to
> > execute /usr/sbin/postdrop -r: Success
> > 
> >  
> > 
> > I have auditd running.  In fact, I regularly use audit2allow to
> > create allow policies on this machine.  So I can confidently say
> > normally my selinux denials get logged in the audit.log.  I am at a
> > loss to think of any reason this particular failure is not getting
> > logged the same way my other error messages usually get logged.
> > 
> >  
> > 
> > I believe I can write a custom allow script by hand, but I believe I
> > probably shouldn't, or if I try, it will fail for some reason.  
> > 
> >  
> > 
> > Thanks for your help...
> 
> The denials you're getting are probably being dontaudit-ed. See:
> 
> http://danwalsh.livejournal.com/11673.html
	... try to find a selinux errors:
grep -i err /var/log/audit/audit.log
or switch noaudit off:
semodule -BD
Regards
								Adam Przybyla
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