From 8bf4b8a1083694d5aac292f92705ddd3aec29be6 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 4 Apr 2006 12:51:05 -0700 Subject: [PATCH] [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: Herbert Xu Signed-off-by: David S. Miller --- net/ipv4/xfrm4_input.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c index e1b8f4b90d8..7a0b9524fe0 100644 --- a/net/ipv4/xfrm4_input.c +++ b/net/ipv4/xfrm4_input.c @@ -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)) -- 2.20.1