Commit b8b549ee authored Feb 28, 2018 by Steffen Klassert

xfrm: Fix ESN sequence number handling for IPsec GSO packets.



When IPsec offloading was introduced, we accidentally incremented
the sequence number counter on the xfrm_state by one packet
too much in the ESN case. This leads to a sequence number gap of
one packet after each GSO packet. Fix this by setting the sequence
number to the correct value.

Fixes: d7dbefc4 ("xfrm: Add xfrm_replay_overflow functions for offloading")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

parent 013cb81e

net/xfrm/xfrm_replay.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -660,7 +660,7 @@ static int xfrm_replay_overflow_offload_esn(struct xfrm_state *x, struct sk_buff
		} else {
		XFRM_SKB_CB(skb)->seq.output.low = oseq + 1;
		XFRM_SKB_CB(skb)->seq.output.hi = oseq_hi;
		xo->seq.low = oseq = oseq + 1;
		xo->seq.low = oseq + 1;
		xo->seq.hi = oseq_hi;
		oseq += skb_shinfo(skb)->gso_segs;
		}