1 files changed, 12 insertions, 2 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 31bdedc32bdd..ad235690684c 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2657,8 +2657,18 @@ static void init_loopback(struct net_device *dev)
                         if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
                                 continue;
 
-                        if (sp_ifa->rt)
-                                continue;
+                        if (sp_ifa->rt) {
+                                /* This dst has been added to garbage list when
+                                 * lo device down, release this obsolete dst and
+                                 * reallocate a new router for ifa.
+                                 */
+                                if (sp_ifa->rt->dst.obsolete > 0) {
+                                        ip6_rt_put(sp_ifa->rt);
+                                        sp_ifa->rt = NULL;
+                                } else {
+                                        continue;
+                                }
+                        }
 
                         sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, false);