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Subject: Re: kern/134557: commit references a PR
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The following reply was made to PR kern/134557; it has been noted by GNATS.

From: dfilter@FreeBSD.ORG (dfilter service)
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/134557: commit references a PR
Date: Sat,  4 Jul 2009 06:01:15 +0000 (UTC)

 Author: mav
 Date: Sat Jul  4 06:00:57 2009
 New Revision: 195336
 URL: http://svn.freebsd.org/changeset/base/195336
 
 Log:
   MFC rev.195335:
   Fix infinite loop in ng_iface, that happens when packet passes out via
   two different ng interfaces sequentially due to tunnelling.
   
   PR:		kern/134557
   Submitted by:	Mikolaj Golub
 
 Modified:
   stable/7/sys/   (props changed)
   stable/7/sys/contrib/pf/   (props changed)
   stable/7/sys/netgraph/ng_iface.c
 
 Modified: stable/7/sys/netgraph/ng_iface.c
 ==============================================================================
 --- stable/7/sys/netgraph/ng_iface.c	Sat Jul  4 05:07:52 2009	(r195335)
 +++ stable/7/sys/netgraph/ng_iface.c	Sat Jul  4 06:00:57 2009	(r195336)
 @@ -365,7 +365,8 @@ ng_iface_output(struct ifnet *ifp, struc
  	}
  
  	/* Protect from deadly infinite recursion. */
 -	while ((mtag = m_tag_locate(m, MTAG_NGIF, MTAG_NGIF_CALLED, NULL))) {
 +	mtag = NULL;
 +	while ((mtag = m_tag_locate(m, MTAG_NGIF, MTAG_NGIF_CALLED, mtag))) {
  		if (*(struct ifnet **)(mtag + 1) == ifp) {
  			log(LOG_NOTICE, "Loop detected on %s\n", ifp->if_xname);
  			m_freem(m);
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