releases/4.7.7/batman-adv-fix-elp-packet-data-reservation.patch

   1 From 1e5d343b8f23770e8ac5d31f5c439826bdb35148 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
   3 Date: Tue, 23 Aug 2016 03:13:03 +0200
   4 Subject: batman-adv: fix elp packet data reservation
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 From: Linus Lüssing <linus.luessing@c0d3.blue>
  10
  11 commit 1e5d343b8f23770e8ac5d31f5c439826bdb35148 upstream.
  12
  13 The skb_reserve() call only reserved headroom for the mac header, but
  14 not the elp packet header itself.
  15
  16 Fixing this by using skb_put()'ing towards the skb tail instead of
  17 skb_push()'ing towards the skb head.
  18
  19 Fixes: d6f94d91f766 ("batman-adv: ELP - adding basic infrastructure")
  20 Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
  21 Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
  22 Signed-off-by: Sven Eckelmann <sven@narfation.org>
  23 Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
  24 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  25
  26 ---
  27  net/batman-adv/bat_v_elp.c |    2 +-
  28  1 file changed, 1 insertion(+), 1 deletion(-)
  29
  30 --- a/net/batman-adv/bat_v_elp.c
  31 +++ b/net/batman-adv/bat_v_elp.c
  32 @@ -334,7 +334,7 @@ int batadv_v_elp_iface_enable(struct bat
  33                 goto out;
  34
  35         skb_reserve(hard_iface->bat_v.elp_skb, ETH_HLEN + NET_IP_ALIGN);
  36 -       elp_buff = skb_push(hard_iface->bat_v.elp_skb, BATADV_ELP_HLEN);
  37 +       elp_buff = skb_put(hard_iface->bat_v.elp_skb, BATADV_ELP_HLEN);
  38         elp_packet = (struct batadv_elp_packet *)elp_buff;
  39         memset(elp_packet, 0, BATADV_ELP_HLEN);
  40