Commit 8bf4b8a1 authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller
Browse files

[IPSEC]: Check x->encap before dereferencing it



We need to dereference x->encap before dereferencing it for encap_type.
If it's absent then the encap_type is zero.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 67644726
......@@ -90,7 +90,7 @@ int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
if (unlikely(x->km.state != XFRM_STATE_VALID))
goto drop_unlock;
if (x->encap->encap_type != encap_type)
if ((x->encap ? x->encap->encap_type : 0) != encap_type)
goto drop_unlock;
if (x->props.replay_window && xfrm_replay_check(x, seq))
......
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