packet: read num_members once in packet_rcv_fanout()

[linux-2.6-block.git] / net / packet / af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index b5989c6ee5513904127a8ffec31d09589094c8f6..131545a06f050faf096440c892c1bc4543c7d6e9 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1353,7 +1353,7 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev,
                             struct packet_type *pt, struct net_device *orig_dev)
 {
        struct packet_fanout *f = pt->af_packet_priv;
-       unsigned int num = f->num_members;
+       unsigned int num = READ_ONCE(f->num_members);
        struct packet_sock *po;
        unsigned int idx;