[IPV6] ADDRCONF: Do not verify an address with infinity lifetime

We also do not try regenarating new temporary address corresponding to an
address with infinite preferred lifetime.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c0641887bdeb..93a40a8ade88 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2797,12 +2797,16 @@ restart:
                                         ifp->idev->nd_parms->retrans_time / HZ;
 #endif
 
-                        if (age >= ifp->valid_lft) {
+                        if (ifp->valid_lft != INFINITY_LIFE_TIME &&
+                            age >= ifp->valid_lft) {
                                 spin_unlock(&ifp->lock);
                                 in6_ifa_hold(ifp);
                                 read_unlock(&addrconf_hash_lock);
                                 ipv6_del_addr(ifp);
                                 goto restart;
+                        } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
+                                spin_unlock(&ifp->lock);
+                                continue;
                         } else if (age >= ifp->prefered_lft) {
                                 /* jiffies - ifp->tsamp > age >= ifp->prefered_lft */
                                 int deprecate = 0;