[IPSEC]: allow only tunnel mode in xfrm4_tunnels.

a907233d · James Morris · d25c7f63 · a907233d
Commit a907233d authored Apr 26, 2003 by James Morris
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net/ipv4/xfrm4_tunnel.c net/ipv4/xfrm4_tunnel.c +2 -0

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--- a/net/ipv4/xfrm4_tunnel.c
+++ b/net/ipv4/xfrm4_tunnel.c
@@ -174,6 +174,8 @@ static void ipip_err(struct sk_buff *skb, u32 info)

 static int ipip_init_state(struct xfrm_state *x, void *args)
 {
+	if (!x->props.mode)
+		return -EINVAL;
 	x->props.header_len = sizeof(struct iphdr);

 	return 0;