net: fix data-race in neigh_event_send()

[tomoyo/tomoyo-test1.git] / include / net / neighbour.h

diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 50a67bd..b8452cc 100644 (file)
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -439,8 +439,8 @@ static inline int neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
 {
        unsigned long now = jiffies;
        
-       if (neigh->used != now)
-               neigh->used = now;
+       if (READ_ONCE(neigh->used) != now)
+               WRITE_ONCE(neigh->used, now);
        if (!(neigh->nud_state&(NUD_CONNECTED|NUD_DELAY|NUD_PROBE)))
                return __neigh_event_send(neigh, skb);
        return 0;