1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 84c358804355..72ffd3d760ff 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1165,7 +1165,8 @@ check_cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long *expires)
         list_for_each_entry(ifa, &idev->addr_list, if_list) {
                 if (ifa == ifp)
                         continue;
-                if (!ipv6_prefix_equal(&ifa->addr, &ifp->addr,
+                if (ifa->prefix_len != ifp->prefix_len ||
+                    !ipv6_prefix_equal(&ifa->addr, &ifp->addr,
                                        ifp->prefix_len))
                         continue;
                 if (ifa->flags & (IFA_F_PERMANENT | IFA_F_NOPREFIXROUTE))