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bareudp: Pull inner IP header on xmit.

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[ Upstream commit c471236b2359e6b27388475dd04fff0a5e2bf922 ]

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: 571912c69f ("net: UDP tunnel encapsulation module for tunnelling different protocols like MPLS, IP, NSH etc.")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/267328222f0a11519c6de04c640a4f87a38ea9ed.1726046181.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Guillaume Nault 2024-09-11 11:21:05 +02:00 committed by Greg Kroah-Hartman
parent b48fae6788
commit e296245ca8
1 changed files with 6 additions and 0 deletions
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6
drivers/net/bareudp.c
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@ -311,6 +311,9 @@ 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;
@ -374,6 +377,9 @@ 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;