From: Jason A. Donenfeld Date: Tue, 30 Jun 2020 01:06:20 +0000 (-0600) Subject: wireguard: implement header_ops->parse_protocol for AF_PACKET X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=01a4967c71c004f8ecad4ab57021348636502fa9;p=linux.git wireguard: implement header_ops->parse_protocol for AF_PACKET WireGuard uses skb->protocol to determine packet type, and bails out if it's not set or set to something it's not expecting. For AF_PACKET injection, we need to support its call chain of: packet_sendmsg -> packet_snd -> packet_parse_headers -> dev_parse_header_protocol -> parse_protocol Without a valid parse_protocol, this returns zero, and wireguard then rejects the skb. So, this wires up the ip_tunnel handler for layer 3 packets for that case. Reported-by: Hans Wippel Signed-off-by: Jason A. Donenfeld Signed-off-by: David S. Miller --- diff --git a/drivers/net/wireguard/device.c b/drivers/net/wireguard/device.c index a8f151b1b5fab..c9f65e96ccb04 100644 --- a/drivers/net/wireguard/device.c +++ b/drivers/net/wireguard/device.c @@ -262,6 +262,7 @@ static void wg_setup(struct net_device *dev) max(sizeof(struct ipv6hdr), sizeof(struct iphdr)); dev->netdev_ops = &netdev_ops; + dev->header_ops = &ip_tunnel_header_ops; dev->hard_header_len = 0; dev->addr_len = 0; dev->needed_headroom = DATA_PACKET_HEAD_ROOM;