netfilter: Pass socket pointer down through okfn().
On the output paths in particular, we have to sometimes deal with two
socket contexts. First, and usually skb->sk, is the local socket that
generated the frame.
And second, is potentially the socket used to control a tunneling
socket, such as one the encapsulates using UDP.
We do not want to disassociate skb->sk when encapsulating in order
to fix this, because that would break socket memory accounting.
The most extreme case where this can cause huge problems is an
AF_PACKET socket transmitting over a vxlan device. We hit code
paths doing checks that assume they are dealing with an ipv4
socket, but are actually operating upon the AF_PACKET one.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 461f835..36ac102 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -332,7 +332,7 @@
int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
int (*output)(struct sock *sk, struct sk_buff *skb);
- int (*output_finish)(struct sk_buff *skb);
+ int (*output_finish)(struct sock *sk, struct sk_buff *skb);
int (*extract_input)(struct xfrm_state *x,
struct sk_buff *skb);
int (*extract_output)(struct xfrm_state *x,
@@ -1503,7 +1503,7 @@
int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
int xfrm_output_resume(struct sk_buff *skb, int err);
-int xfrm_output(struct sk_buff *skb);
+int xfrm_output(struct sock *sk, struct sk_buff *skb);
int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
void xfrm_local_error(struct sk_buff *skb, int mtu);
int xfrm4_extract_header(struct sk_buff *skb);
@@ -1524,7 +1524,7 @@
int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm4_output(struct sock *sk, struct sk_buff *skb);
-int xfrm4_output_finish(struct sk_buff *skb);
+int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
@@ -1549,7 +1549,7 @@
int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_output(struct sock *sk, struct sk_buff *skb);
-int xfrm6_output_finish(struct sk_buff *skb);
+int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
u8 **prevhdr);