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Included changes ares: 

- fix an skb memleak in DAT
 - fix the ARP filtering routine in DAT by preventing bogus entries to overwrite
   already existing ones in the local cache.
 - fix the ARP filtering routine in DAT by preventing it to parse and add to the
   cache bogus entries
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Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge

Included changes ares:
- fix an skb memleak in DAT
- fix the ARP filtering routine in DAT by preventing bogus entries to overwrite
  already existing ones in the local cache.
- fix the ARP filtering routine in DAT by preventing it to parse and add to the
  cache bogus entries

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-01-27 19:10:36 -05:00
parent 1591ab6740 b618ad1103
commit 2afd0a24da
1 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
net/batman-adv/distributed-arp-table.c
View File

@ -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;
}