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Diffstat (limited to 'net/xfrm/xfrm_output.c')
-rw-r--r--net/xfrm/xfrm_output.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 9bdf16f13606..17c4f58d28ea 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -623,7 +623,10 @@ EXPORT_SYMBOL_GPL(xfrm_output);
static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
{
+ const struct xfrm_state_afinfo *afinfo;
struct xfrm_mode *inner_mode;
+ int err = -EAFNOSUPPORT;
+
if (x->sel.family == AF_UNSPEC)
inner_mode = xfrm_ip2inner_mode(x,
xfrm_af2proto(skb_dst(skb)->ops->family));
@@ -632,7 +635,14 @@ static int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb)
if (inner_mode == NULL)
return -EAFNOSUPPORT;
- return inner_mode->afinfo->extract_output(x, skb);
+
+ rcu_read_lock();
+ afinfo = xfrm_state_afinfo_get_rcu(inner_mode->family);
+ if (likely(afinfo))
+ err = afinfo->extract_output(x, skb);
+ rcu_read_unlock();
+
+ return err;
}
void xfrm_local_error(struct sk_buff *skb, int mtu)