renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-20 11:13:58 +08:00
Code

xfrm: Fix double ESP trailer insertion in IPsec crypto offload.

Browse Source 
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: f6e27114a6 ("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>
This commit is contained in:
Huy Nguyen 2020-06-01 16:39:37 -05:00 committed by Steffen Klassert
parent cb8e59cc87
commit 94579ac3f6
2 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/xfrm.h
View File

@ -1008,6 +1008,7 @@ 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

4
net/xfrm/xfrm_device.c
View File

@ -108,7 +108,7 @@ 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))
@ -129,6 +129,8 @@ 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;