diff mbox

[16/17] batman-adv: Disallow zero and mcast src address for mgmt frames

Message ID 20161108164526.7518-17-sw@simonwunderlich.de (mailing list archive)
State Not Applicable, archived
Headers

Commit Message

Simon Wunderlich Nov. 8, 2016, 4:45 p.m. UTC 
  From: Sven Eckelmann <sven@narfation.org>

The routing check for management frames is validating the source mac
address in the outer ethernet header. It rejects every source mac address
which is a broadcast address. But it also has to reject the zero-mac
address and multicast mac addresses.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 net/batman-adv/routing.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 9646623..381f040 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -196,8 +196,8 @@  bool batadv_check_management_packet(struct sk_buff *skb,
 	if (!is_broadcast_ether_addr(ethhdr->h_dest))
 		return false;
 
-	/* packet with broadcast sender address */
-	if (is_broadcast_ether_addr(ethhdr->h_source))
+	/* packet with invalid sender address */
+	if (!is_valid_ether_addr(ethhdr->h_source))
 		return false;
 
 	/* create a copy of the skb, if needed, to modify it. */