batman-adv: fix elp packet data reservation
authorLinus Lüssing <linus.luessing@c0d3.blue>
Tue, 23 Aug 2016 01:13:03 +0000 (03:13 +0200)
committerSimon Wunderlich <sw@simonwunderlich.de>
Fri, 26 Aug 2016 13:22:31 +0000 (15:22 +0200)
The skb_reserve() call only reserved headroom for the mac header, but
not the elp packet header itself.

Fixing this by using skb_put()'ing towards the skb tail instead of
skb_push()'ing towards the skb head.

Fixes: d6f94d91f766 ("batman-adv: ELP - adding basic infrastructure")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
net/batman-adv/bat_v_elp.c

index 7d170010beb9050ffbb90aff463c16cde60e144d..ee08540ce503a1cc3fc350a693d87510cf51ab32 100644 (file)
@@ -335,7 +335,7 @@ int batadv_v_elp_iface_enable(struct batadv_hard_iface *hard_iface)
                goto out;
 
        skb_reserve(hard_iface->bat_v.elp_skb, ETH_HLEN + NET_IP_ALIGN);
-       elp_buff = skb_push(hard_iface->bat_v.elp_skb, BATADV_ELP_HLEN);
+       elp_buff = skb_put(hard_iface->bat_v.elp_skb, BATADV_ELP_HLEN);
        elp_packet = (struct batadv_elp_packet *)elp_buff;
        memset(elp_packet, 0, BATADV_ELP_HLEN);