From 4d53eff48b5f03ce67f4f301d6acca1d2145cb7a Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Wed, 16 Oct 2013 13:42:46 +0200 Subject: [PATCH] xfrm: Don't queue retransmitted packets if the original is still on the host It does not make sense to queue retransmitted packets if the original packet is still in some queue of this host. So add a check to xdst_queue_output() and drop the packet if the original packet is not yet sent. Signed-off-by: Steffen Klassert Acked-by: Eric Dumazet --- net/xfrm/xfrm_policy.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index ed38d5d81f9e..e09edfcf1b79 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1832,6 +1832,13 @@ static int xdst_queue_output(struct sk_buff *skb) struct dst_entry *dst = skb_dst(skb); struct xfrm_dst *xdst = (struct xfrm_dst *) dst; struct xfrm_policy_queue *pq = &xdst->pols[0]->polq; + const struct sk_buff *fclone = skb + 1; + + if (unlikely(skb->fclone == SKB_FCLONE_ORIG && + fclone->fclone == SKB_FCLONE_CLONE)) { + kfree_skb(skb); + return 0; + } if (pq->hold_queue.qlen > XFRM_MAX_QUEUE_LEN) { kfree_skb(skb); -- 2.20.1