From: Sven Eckelmann Date: Sat, 6 Aug 2016 15:04:22 +0000 (+0200) Subject: batman-adv: Disallow zero and mcast src address for mgmt frames X-Git-Tag: v4.14-rc1~1973^2~219^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=92eef520d77d106d9ea06b17294c5079edefe95d;p=platform%2Fkernel%2Flinux-rpi.git 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: Sven Eckelmann Signed-off-by: Simon Wunderlich --- diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index c02897b..4f034df 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. */