4.15-stable review patch. If anyone has any objections, please let me know.
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From: Yossef Efraim yossefe@mellanox.com
[ Upstream commit 0ba23a211360af7b6658e4fcfc571970bbbacc55 ]
In case of wrap around, replay_esn->oseq_hi is not updated before it is tested for it's actual value, leading function to fail with overflow indication and packets being dropped.
This patch updates replay_esn->oseq_hi in the right place.
Fixes: d7dbefc45cf5 ("xfrm: Add xfrm_replay_overflow functions for offloading") Signed-off-by: Yossef Efraim yossefe@mellanox.com Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/xfrm/xfrm_replay.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/net/xfrm/xfrm_replay.c +++ b/net/xfrm/xfrm_replay.c @@ -666,7 +666,7 @@ static int xfrm_replay_overflow_offload_ if (unlikely(oseq < replay_esn->oseq)) { XFRM_SKB_CB(skb)->seq.output.hi = ++oseq_hi; xo->seq.hi = oseq_hi; - + replay_esn->oseq_hi = oseq_hi; if (replay_esn->oseq_hi == 0) { replay_esn->oseq--; replay_esn->oseq_hi--; @@ -678,7 +678,6 @@ static int xfrm_replay_overflow_offload_ }
replay_esn->oseq = oseq; - replay_esn->oseq_hi = oseq_hi;
if (xfrm_aevent_is_on(net)) x->repl->notify(x, XFRM_REPLAY_UPDATE);