Commit 92eef520 authored by Sven Eckelmann's avatar Sven Eckelmann Committed by Simon Wunderlich
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batman-adv: Disallow zero and mcast src address for mgmt frames 



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: default avatarSven Eckelmann <sven@narfation.org>
Signed-off-by: default avatarSimon Wunderlich <sw@simonwunderlich.de>
parent 9f75c8e1

net/batman-adv/routing.c

+2 −2
Original line number Diff line number Diff line
@@ -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. */