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From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Wed, 22 Oct 2008 14:56:15 +0000 (UTC)
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Subject: svn commit: r184162 - in stable/6/sys: . netinet6
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Author: bz
Date: Wed Oct 22 14:56:15 2008
New Revision: 184162
URL: http://svn.freebsd.org/changeset/base/184162

Log:
  MFC: r183923
  
    Check that the mbuf len is positive (like we do in the v4 case)
    to avoid possible panics.
  
  PR:		kern/119123
  Approved by:	re (kib)

Modified:
  stable/6/sys/   (props changed)
  stable/6/sys/netinet6/ip6_output.c

Modified: stable/6/sys/netinet6/ip6_output.c
==============================================================================
--- stable/6/sys/netinet6/ip6_output.c	Wed Oct 22 14:45:30 2008	(r184161)
+++ stable/6/sys/netinet6/ip6_output.c	Wed Oct 22 14:56:15 2008	(r184162)
@@ -2979,7 +2979,7 @@ ip6_setpktopts(control, opt, stickyopt, 
 	if (control->m_next)
 		return (EINVAL);
 
-	for (; control->m_len; control->m_data += CMSG_ALIGN(cm->cmsg_len),
+	for (; control->m_len > 0; control->m_data += CMSG_ALIGN(cm->cmsg_len),
 	    control->m_len -= CMSG_ALIGN(cm->cmsg_len)) {
 		int error;