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From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Sat, 9 Jun 2012 22:44:25 +0000 (UTC)
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Subject: svn commit: r236826 - stable/9/sys/netinet6
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Author: bz
Date: Sat Jun  9 22:44:24 2012
New Revision: 236826
URL: http://svn.freebsd.org/changeset/base/236826

Log:
  MFC r236615:
  
   Plug two interface address refcount leaks in early error return cases
   in the ioctl path.
  
   Reported by:	rpaulo
   Reviewed by:	emax

Modified:
  stable/9/sys/netinet6/in6.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/netinet6/in6.c
==============================================================================
--- stable/9/sys/netinet6/in6.c	Sat Jun  9 22:26:53 2012	(r236825)
+++ stable/9/sys/netinet6/in6.c	Sat Jun  9 22:44:24 2012	(r236826)
@@ -1638,14 +1638,19 @@ in6_lifaddr_ioctl(struct socket *so, u_l
 			hostid = IFA_IN6(ifa);
 
 			/* prefixlen must be <= 64. */
-			if (64 < iflr->prefixlen)
+			if (64 < iflr->prefixlen) {
+				if (ifa != NULL)
+					ifa_free(ifa);
 				return EINVAL;
+			}
 			prefixlen = iflr->prefixlen;
 
 			/* hostid part must be zero. */
 			sin6 = (struct sockaddr_in6 *)&iflr->addr;
 			if (sin6->sin6_addr.s6_addr32[2] != 0 ||
 			    sin6->sin6_addr.s6_addr32[3] != 0) {
+				if (ifa != NULL)
+					ifa_free(ifa);
 				return EINVAL;
 			}
 		} else