Repository : ssh://git@open-mesh.org/batman-adv On branch : maint commit 02008ee7543a6da10b7d8c648701f031da034365 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Tue Jun 30 23:45:26 2015 +0200 batman-adv: Fix potentially broken skb network header access The two commits noted below added calls to ip_hdr() and ipv6_hdr(). They need a correctly set skb network header. Unfortunately we cannot rely on the device drivers to set it for us. Therefore setting it in the beginning of the according ndo_start_xmit handler. Fixes: 405cc1e5 ("batman-adv: Modified forwarding behaviour for multicast packets") Fixes: 1c090349 ("batman-adv: Add IPv4 link-local/IPv6-ll-all-nodes multicast support") Signed-off-by: Linus Lüssing <linus.luessing(a)c0d3.blue> Signed-off-by: Marek Lindner <mareklindner(a)neomailbox.ch> 02008ee7543a6da10b7d8c648701f031da034365 soft-interface.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/soft-interface.c b/soft-interface.c index 7841a4b..eb87fd9 100644 --- a/soft-interface.c +++ b/soft-interface.c @@ -178,6 +178,7 @@ static int batadv_interface_tx(struct sk_buff *skb, int gw_mode; enum batadv_forw_mode forw_mode; struct batadv_orig_node *mcast_single_orig = NULL; + int network_offset = ETH_HLEN; if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE) goto dropped; @@ -190,14 +191,18 @@ static int batadv_interface_tx(struct sk_buff *skb, case ETH_P_8021Q: vhdr = vlan_eth_hdr(skb); - if (vhdr->h_vlan_encapsulated_proto != ethertype) + if (vhdr->h_vlan_encapsulated_proto != ethertype) { + network_offset += VLAN_HLEN; break; + } /* fall through */ case ETH_P_BATMAN: goto dropped; } + skb_set_network_header(skb, network_offset); + if (batadv_bla_tx(bat_priv, skb, vid)) goto dropped;