openwrtv4/target/linux/generic/patches-3.18/081-02-pppoe-Lacks-DST-MAC-address-check.patch
Hauke Mehrtens de18003b6e kernel/3.18: update to version 3.18.25
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 48225
2016-01-12 20:53:04 +00:00

25 lines
830 B
Diff

From: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Date: Mon, 20 Apr 2015 21:07:48 +0200
Subject: [PATCH] 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>
---
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -379,6 +379,9 @@ static int pppoe_rcv_core(struct sock *s
* 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) {