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authorJoakim Tjernlund <Joakim.Tjernlund@transmode.se>2015-04-20 21:07:48 +0200
committerDavid S. Miller <davem@davemloft.net>2015-04-20 15:26:57 -0400
commita068833bbf0ede9203410f8fd186178c758ade9b (patch)
tree4ed6dc262885a8137d7871ac12f8a74cb5d32ac7 /drivers/net/ppp
parent2ab957492d13bb819400ac29ae55911d50a82a13 (diff)
downloadlinux-a068833bbf0ede9203410f8fd186178c758ade9b.tar.bz2
pppoe: Lacks DST MAC address check
A pppoe session is identified by its session ID and MAC address. Currently pppoe does not check if the received pkg has the correct MAC address. This is a problem when the eth I/F is in promisc mode as then any DST MAC address is accepted. Signed-off-by: Joakim Tjernlund <joakim.tjernlund@transmode.se> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ppp')
-rw-r--r--drivers/net/ppp/pppoe.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index ff059e1d8ac6..aa1dd926623a 100644
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -380,6 +380,9 @@ static int pppoe_rcv_core(struct sock *sk, struct sk_buff *skb)
* can't change.
*/
+ if (skb->pkt_type == PACKET_OTHERHOST)
+ goto abort_kfree;
+
if (sk->sk_state & PPPOX_BOUND) {
ppp_input(&po->chan, skb);
} else if (sk->sk_state & PPPOX_RELAY) {