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Date: Sun, 9 Jun 1996 19:49:03 +0930 (CST)
From: Peter Childs <pjchilds@imforei.apana.org.au>
Reply-To: pjchilds@imforei.apana.org.au
To: FreeBSD-gnats-submit@freebsd.org
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Subject: kern/1304: kernel tunnel bug
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>Number:         1304
>Category:       kern
>Synopsis:       incorrect return
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jun  9 03:20:01 PDT 1996
>Last-Modified:
>Originator:     Peter Childs
>Organization:
Peter Childs  ---  http://www.imforei.apana.org.au/~pjchilds
>Release:        FreeBSD 2.1-STABLE i386
>Environment:

 2.1-stable CTM'd to 116.

>Description:

 Line 150 of /sys/net/if_tun.c returns ENXIO when it should return
 EBUSY.

 This can cause problems if the ppp code assumes because
 device 0 returned ENXIO that no other devices will be available
 (which would be sensible), and terminates its loop without assigning
 a tunnel device.
 
 The current stable :) os.c code doesn't, but thats broken
 in its own special way anyway :)

>How-To-Repeat:

 Glance at the code..

>Fix:
	
 change

  return ENXIO;

 to
  
  return EBUSY;


>Audit-Trail:
>Unformatted: