1 files changed, 12 insertions, 5 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d5fa5b8c443e..f62c72b59f8e 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1671,7 +1671,7 @@ void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
 {
         struct in6_addr addr;
-        if (ifp->prefix_len == 127) /* RFC 6164 */
+        if (ifp->prefix_len >= 127) /* RFC 6164 */
                 return;
         ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
         if (ipv6_addr_any(&addr))
@@ -1682,7 +1682,7 @@ static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
 {
         struct in6_addr addr;
-        if (ifp->prefix_len == 127) /* RFC 6164 */
+        if (ifp->prefix_len >= 127) /* RFC 6164 */
                 return;
         ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
         if (ipv6_addr_any(&addr))
@@ -3456,7 +3456,12 @@ restart:
                                          &inet6_addr_lst[i], addr_lst) {
                         unsigned long age;
 
-                        if (ifp->flags & IFA_F_PERMANENT)
+                        /* When setting preferred_lft to a value not zero or
+                         * infinity, while valid_lft is infinity
+                         * IFA_F_PERMANENT has a non-infinity life time.
+                         */
+                        if ((ifp->flags & IFA_F_PERMANENT) &&
+                            (ifp->prefered_lft == INFINITY_LIFE_TIME))
                                 continue;
 
                         spin_lock(&ifp->lock);
@@ -3481,7 +3486,8 @@ restart:
                                         ifp->flags |= IFA_F_DEPRECATED;
                                 }
 
-                                if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
+                                if ((ifp->valid_lft != INFINITY_LIFE_TIME) &&
+                                    (time_before(ifp->tstamp + ifp->valid_lft * HZ, next)))
                                         next = ifp->tstamp + ifp->valid_lft * HZ;
 
                                 spin_unlock(&ifp->lock);
@@ -3761,7 +3767,8 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
         put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
                       ifa->idev->dev->ifindex);
 
-        if (!(ifa->flags&IFA_F_PERMANENT)) {
+        if (!((ifa->flags&IFA_F_PERMANENT) &&
+              (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
                 preferred = ifa->prefered_lft;
                 valid = ifa->valid_lft;
                 if (preferred != INFINITY_LIFE_TIME) {