From 71b1391a41289735676be02e35239e5aa9fe6ba6 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 25 Nov 2011 06:47:16 +0000 Subject: [PATCH] l2tp: ensure sk->dst is still valid When using l2tp over ipsec, the tunnel will hang when rekeying occurs. Reason is that the transformer bundle attached to the dst entry is now in STATE_DEAD and thus xfrm_output_one() drops all packets (XfrmOutStateExpired increases). Fix this by calling __sk_dst_check (which drops the stale dst if xfrm dst->check callback finds that the bundle is no longer valid). Cc: James Chapman Signed-off-by: Florian Westphal Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- net/l2tp/l2tp_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c index cf0f308abf5e..89ff8c67943e 100644 --- a/net/l2tp/l2tp_core.c +++ b/net/l2tp/l2tp_core.c @@ -1072,7 +1072,7 @@ int l2tp_xmit_skb(struct l2tp_session *session, struct sk_buff *skb, int hdr_len /* Get routing info from the tunnel socket */ skb_dst_drop(skb); - skb_dst_set(skb, dst_clone(__sk_dst_get(sk))); + skb_dst_set(skb, dst_clone(__sk_dst_check(sk, 0))); inet = inet_sk(sk); fl = &inet->cork.fl;