neigh: Protect neigh->ha[] with a seqlock

[cascardo/linux.git] / net / ipv4 / arp.c

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index f353095..d8e540c 100644 (file)
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -502,10 +502,8 @@ int arp_find(unsigned char *haddr, struct sk_buff *skb)
 
        if (n) {
                n->used = jiffies;
-               if (n->nud_state&NUD_VALID || neigh_event_send(n, skb) == 0) {
-                       read_lock_bh(&n->lock);
-                       memcpy(haddr, n->ha, dev->addr_len);
-                       read_unlock_bh(&n->lock);
+               if (n->nud_state & NUD_VALID || neigh_event_send(n, skb) == 0) {
+                       neigh_ha_snapshot(haddr, n, dev);
                        neigh_release(n);
                        return 0;
                }