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esp: choose the correct inner protocol for GSO on inter address family tunnels

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Commit 23c7f8d798 ("net: Fix esp GSO on inter address family
tunnels.") is incomplete. It passes to skb_eth_gso_segment the
protocol for the outer IP version, instead of the inner IP version, so
we end up calling inet_gso_segment on an inner IPv6 packet and
ipv6_gso_segment on an inner IPv4 packet and the packets are dropped.

This patch completes the fix by selecting the correct protocol based
on the inner mode's family.

Fixes: c35fe4106b ("xfrm: Add mode handlers for IPsec on layer 2")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Sabrina Dubroca 2022-08-25 17:16:51 +02:00 committed by Steffen Klassert
parent ebe5555c2f
commit 26dbd66eab
2 changed files with 8 additions and 2 deletions
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5
net/ipv4/esp4_offload.c
View File

@ -110,7 +110,10 @@ static struct sk_buff *xfrm4_tunnel_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
return skb_eth_gso_segment(skb, features, htons(ETH_P_IP));
__be16 type = x->inner_mode.family == AF_INET6 ? htons(ETH_P_IPV6)
: htons(ETH_P_IP);
return skb_eth_gso_segment(skb, features, type);
}
static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x,

5
net/ipv6/esp6_offload.c
View File

@ -145,7 +145,10 @@ static struct sk_buff *xfrm6_tunnel_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
return skb_eth_gso_segment(skb, features, htons(ETH_P_IPV6));
__be16 type = x->inner_mode.family == AF_INET ? htons(ETH_P_IP)
: htons(ETH_P_IPV6);
return skb_eth_gso_segment(skb, features, type);
}
static struct sk_buff *xfrm6_transport_gso_segment(struct xfrm_state *x,