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xfrm: set skb control buffer based on packet offload as well

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[ Upstream commit 8688ab2170a5be0bc922195f7091c38b506bab2e ]

In packet offload, packets are not encrypted in XFRM stack, so
the next network layer which the packets will be forwarded to
should depend on where the packet came from (either xfrm4_output
or xfrm6_output) rather than the matched SA's family type.

Test: verified IPv6-in-IPv4 packets on Android device with
      IPsec packet offload enabled
Signed-off-by: Mike Yu <yumike@google.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mike Yu 2024-03-04 12:24:09 +00:00 committed by Sasha Levin
parent 4f77a8c213
commit 52a85947ac
1 changed files with 5 additions and 1 deletions
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6
net/xfrm/xfrm_output.c
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@ -704,9 +704,13 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
{
struct net *net = dev_net(skb_dst(skb)->dev);
struct xfrm_state *x = skb_dst(skb)->xfrm;
int family;
int err;
switch (x->outer_mode.family) {
family = (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) ? x->outer_mode.family
: skb_dst(skb)->ops->family;
switch (family) {
case AF_INET:
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;