Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

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

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 3a74df750af4044eba0e7d88ae01ca9b4dac0e72..84195dacb8b63f418cac67d4039842dd72eaecc4 100644 (file)
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -958,6 +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) +
@@ -1014,6 +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);
 
@@ -1077,6 +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);
@@ -1228,6 +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;