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path: root/net/ipv4/xfrm4_output.c
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Diffstat (limited to 'net/ipv4/xfrm4_output.c')
-rw-r--r--net/ipv4/xfrm4_output.c27
1 files changed, 11 insertions, 16 deletions
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index be980c195fc5..9bb8905088c7 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -58,21 +58,6 @@ int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb)
return xfrm4_extract_header(skb);
}
-int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
-{
- int err;
-
- err = xfrm_inner_extract_output(x, skb);
- if (err)
- return err;
-
- IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
- skb->protocol = htons(ETH_P_IP);
-
- return x->outer_mode->output2(x, skb);
-}
-EXPORT_SYMBOL(xfrm4_prepare_output);
-
int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb)
{
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
@@ -87,6 +72,8 @@ int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb)
static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct xfrm_state *x = skb_dst(skb)->xfrm;
+ const struct xfrm_state_afinfo *afinfo;
+ int ret = -EAFNOSUPPORT;
#ifdef CONFIG_NETFILTER
if (!x) {
@@ -95,7 +82,15 @@ static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
}
#endif
- return x->outer_mode->afinfo->output_finish(sk, skb);
+ rcu_read_lock();
+ afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode.family);
+ if (likely(afinfo))
+ ret = afinfo->output_finish(sk, skb);
+ else
+ kfree_skb(skb);
+ rcu_read_unlock();
+
+ return ret;
}
int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)