lkml.org 
[lkml]   [2020]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.4 064/178] xfrm: Fix double ESP trailer insertion in IPsec crypto offload.
Date
From: Huy Nguyen <huyn@mellanox.com>

[ Upstream commit 94579ac3f6d0820adc83b5dc5358ead0158101e9 ]

During IPsec performance testing, we see bad ICMP checksum. The error packet
has duplicated ESP trailer due to double validate_xmit_xfrm calls. The first call
is from ip_output, but the packet cannot be sent because
netif_xmit_frozen_or_stopped is true and the packet gets dev_requeue_skb. The second
call is from NET_TX softirq. However after the first call, the packet already
has the ESP trailer.

Fix by marking the skb with XFRM_XMIT bit after the packet is handled by
validate_xmit_xfrm to avoid duplicate ESP trailer insertion.

Fixes: f6e27114a60a ("net: Add a xfrm validate function to validate_xmit_skb")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Reviewed-by: Raed Salem <raeds@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
include/net/xfrm.h | 1 +
net/xfrm/xfrm_device.c | 4 +++-
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index aa08a7a5f6ac5..fb391c00c19ac 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1012,6 +1012,7 @@ struct xfrm_offload {
#define XFRM_GRO 32
#define XFRM_ESP_NO_TRAILER 64
#define XFRM_DEV_RESUME 128
+#define XFRM_XMIT 256

__u32 status;
#define CRYPTO_SUCCESS 1
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index c365b918be35c..bb2292b5260c2 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -82,7 +82,7 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
struct xfrm_offload *xo = xfrm_offload(skb);
struct sec_path *sp;

- if (!xo)
+ if (!xo || (xo->flags & XFRM_XMIT))
return skb;

if (!(features & NETIF_F_HW_ESP))
@@ -103,6 +103,8 @@ struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t featur
return skb;
}

+ xo->flags |= XFRM_XMIT;
+
if (skb_is_gso(skb)) {
struct net_device *dev = skb->dev;

--
2.25.1
\
 
 \ /
  Last update: 2020-06-29 21:48    [W:0.724 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site