Merge branch 'drm-fixes-3.8' of git://people.freedesktop.org/~agd5f/linux

[~andy/linux] / net / batman-adv / distributed-arp-table.c

diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
index 8e1d89d2b1c1cada56f190bcca967525a2b7a2e7..183f97a86bb24c8099f4d3b7b7d4a5919d3432c4 100644 (file)
--- a/net/batman-adv/distributed-arp-table.c
+++ b/net/batman-adv/distributed-arp-table.c
@@ -738,6 +738,7 @@ static uint16_t batadv_arp_get_type(struct batadv_priv *bat_priv,
        struct arphdr *arphdr;
        struct ethhdr *ethhdr;
        __be32 ip_src, ip_dst;
+       uint8_t *hw_src, *hw_dst;
        uint16_t type = 0;
 
        /* pull the ethernet header */
@@ -777,9 +778,23 @@ static uint16_t batadv_arp_get_type(struct batadv_priv *bat_priv,
        ip_src = batadv_arp_ip_src(skb, hdr_size);
        ip_dst = batadv_arp_ip_dst(skb, hdr_size);
        if (ipv4_is_loopback(ip_src) || ipv4_is_multicast(ip_src) ||
-           ipv4_is_loopback(ip_dst) || ipv4_is_multicast(ip_dst))
+           ipv4_is_loopback(ip_dst) || ipv4_is_multicast(ip_dst) ||
+           ipv4_is_zeronet(ip_src) || ipv4_is_lbcast(ip_src) ||
+           ipv4_is_zeronet(ip_dst) || ipv4_is_lbcast(ip_dst))
                goto out;
 
+       hw_src = batadv_arp_hw_src(skb, hdr_size);
+       if (is_zero_ether_addr(hw_src) || is_multicast_ether_addr(hw_src))
+               goto out;
+
+       /* we don't care about the destination MAC address in ARP requests */
+       if (arphdr->ar_op != htons(ARPOP_REQUEST)) {
+               hw_dst = batadv_arp_hw_dst(skb, hdr_size);
+               if (is_zero_ether_addr(hw_dst) ||
+                   is_multicast_ether_addr(hw_dst))
+                       goto out;
+       }
+
        type = ntohs(arphdr->ar_op);
 out:
        return type;
@@ -1012,6 +1027,8 @@ bool batadv_dat_snoop_incoming_arp_reply(struct batadv_priv *bat_priv,
         */
        ret = !batadv_is_my_client(bat_priv, hw_dst);
 out:
+       if (ret)
+               kfree_skb(skb);
        /* if ret == false -> packet has to be delivered to the interface */
        return ret;
 }