diff options
Diffstat (limited to 'net/xfrm/xfrm_output.c')
| -rw-r--r-- | net/xfrm/xfrm_output.c | 12 |
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) |