Commit c471236b authored by Guillaume Nault's avatar Guillaume Nault Committed by Jakub Kicinski
Browse files

bareudp: Pull inner IP header on xmit. 



Both bareudp_xmit_skb() and bareudp6_xmit_skb() read their skb's inner
IP header to get its ECN value (with ip_tunnel_ecn_encap()). Therefore
we need to ensure that the inner IP header is part of the skb's linear
data.

Fixes: 571912c6 ("net: UDP tunnel encapsulation module for tunnelling different protocols like MPLS, IP, NSH etc.")
Signed-off-by: default avatarGuillaume Nault <gnault@redhat.com>
Reviewed-by: default avatarWillem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/267328222f0a11519c6de04c640a4f87a38ea9ed.1726046181.git.gnault@redhat.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 45fa29c8

drivers/net/bareudp.c

+6 −0
Original line number Diff line number Diff line
@@ -317,6 +317,9 @@ static int bareudp_xmit_skb(struct sk_buff *skb, struct net_device *dev, 
	__be32 saddr;

	int err;



	if (!skb_vlan_inet_prepare(skb, skb->protocol != htons(ETH_P_TEB)))

		return -EINVAL;



	if (!sock)

		return -ESHUTDOWN;
@@ -384,6 +387,9 @@ static int bareudp6_xmit_skb(struct sk_buff *skb, struct net_device *dev, 
	__be16 sport;

	int err;



	if (!skb_vlan_inet_prepare(skb, skb->protocol != htons(ETH_P_TEB)))

		return -EINVAL;



	if (!sock)

		return -ESHUTDOWN;