Merge branch 'next' of git://git.infradead.org/users/pcmoore/selinux into next

[firefly-linux-kernel-4.4.55.git] / net / core / neighbour.c

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 3de6542560288b3896ab243879a7b4a9b098ca0d..84195dacb8b63f418cac67d4039842dd72eaecc4 100644 (file)
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -913,6 +913,7 @@ static void neigh_timer_handler(unsigned long arg)
                        neigh->nud_state = NUD_PROBE;
                        neigh->updated = jiffies;
                        atomic_set(&neigh->probes, 0);
+                       notify = 1;
                        next = now + NEIGH_VAR(neigh->parms, RETRANS_TIME);
                }
        } else {
@@ -957,6 +958,8 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
        rc = 0;
        if (neigh->nud_state & (NUD_CONNECTED | NUD_DELAY | NUD_PROBE))
                goto out_unlock_bh;
+       if (neigh->dead)
+               goto out_dead;
 
        if (!(neigh->nud_state & (NUD_STALE | NUD_INCOMPLETE))) {
                if (NEIGH_VAR(neigh->parms, MCAST_PROBES) +
@@ -1013,6 +1016,13 @@ out_unlock_bh:
                write_unlock(&neigh->lock);
        local_bh_enable();
        return rc;
+
+out_dead:
+       if (neigh->nud_state & NUD_STALE)
+               goto out_unlock_bh;
+       write_unlock_bh(&neigh->lock);
+       kfree_skb(skb);
+       return 1;
 }
 EXPORT_SYMBOL(__neigh_event_send);
 
@@ -1076,6 +1086,8 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
        if (!(flags & NEIGH_UPDATE_F_ADMIN) &&
            (old & (NUD_NOARP | NUD_PERMANENT)))
                goto out;
+       if (neigh->dead)
+               goto out;
 
        if (!(new & NUD_VALID)) {
                neigh_del_timer(neigh);
@@ -1144,6 +1156,8 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
 
        if (new != old) {
                neigh_del_timer(neigh);
+               if (new & NUD_PROBE)
+                       atomic_set(&neigh->probes, 0);
                if (new & NUD_IN_TIMER)
                        neigh_add_timer(neigh, (jiffies +
                                                ((new & NUD_REACHABLE) ?
@@ -1225,6 +1239,8 @@ EXPORT_SYMBOL(neigh_update);
  */
 void __neigh_set_probe_once(struct neighbour *neigh)
 {
+       if (neigh->dead)
+               return;
        neigh->updated = jiffies;
        if (!(neigh->nud_state & NUD_FAILED))
                return;