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From: Steffen Klassert <steffen.klassert@secunet.com>
To: David Miller <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
	Steffen Klassert <steffen.klassert@secunet.com>,
	<netdev@vger.kernel.org>
Subject: [PATCH 10/11] xfrm: Provide private skb extensions for segmented and hw offloaded ESP packets
Date: Wed, 31 Mar 2021 10:18:46 +0200	[thread overview]
Message-ID: <20210331081847.3547641-11-steffen.klassert@secunet.com> (raw)
In-Reply-To: <20210331081847.3547641-1-steffen.klassert@secunet.com>

Commit 94579ac3f6d0 ("xfrm: Fix double ESP trailer insertion in IPsec
crypto offload.") added a XFRM_XMIT flag to avoid duplicate ESP trailer
insertion on HW offload. This flag is set on the secpath that is shared
amongst segments. This lead to a situation where some segments are
not transformed correctly when segmentation happens at layer 3.

Fix this by using private skb extensions for segmented and hw offloaded
ESP packets.

Fixes: 94579ac3f6d0 ("xfrm: Fix double ESP trailer insertion in IPsec crypto offload.")
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---
 net/ipv4/esp4_offload.c | 11 ++++++++++-
 net/ipv6/esp6_offload.c | 11 ++++++++++-
 net/xfrm/xfrm_device.c  |  2 --
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c
index ed3de486ea34..33687cf58286 100644
--- a/net/ipv4/esp4_offload.c
+++ b/net/ipv4/esp4_offload.c
@@ -314,8 +314,17 @@ static int esp_xmit(struct xfrm_state *x, struct sk_buff *skb,  netdev_features_
 	ip_hdr(skb)->tot_len = htons(skb->len);
 	ip_send_check(ip_hdr(skb));
 
-	if (hw_offload)
+	if (hw_offload) {
+		if (!skb_ext_add(skb, SKB_EXT_SEC_PATH))
+			return -ENOMEM;
+
+		xo = xfrm_offload(skb);
+		if (!xo)
+			return -EINVAL;
+
+		xo->flags |= XFRM_XMIT;
 		return 0;
+	}
 
 	err = esp_output_tail(x, skb, &esp);
 	if (err)
diff --git a/net/ipv6/esp6_offload.c b/net/ipv6/esp6_offload.c
index f35203ab39f5..4af56affaafd 100644
--- a/net/ipv6/esp6_offload.c
+++ b/net/ipv6/esp6_offload.c
@@ -348,8 +348,17 @@ static int esp6_xmit(struct xfrm_state *x, struct sk_buff *skb,  netdev_features
 
 	ipv6_hdr(skb)->payload_len = htons(len);
 
-	if (hw_offload)
+	if (hw_offload) {
+		if (!skb_ext_add(skb, SKB_EXT_SEC_PATH))
+			return -ENOMEM;
+
+		xo = xfrm_offload(skb);
+		if (!xo)
+			return -EINVAL;
+
+		xo->flags |= XFRM_XMIT;
 		return 0;
+	}
 
 	err = esp6_output_tail(x, skb, &esp);
 	if (err)
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index edf11893dbe8..6d6917b68856 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -134,8 +134,6 @@ 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) && unlikely(x->xso.dev != dev)) {
 		struct sk_buff *segs;
 
-- 
2.25.1


  parent reply	other threads:[~2021-03-31  8:19 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-31  8:18 pull request (net): ipsec 2021-03-31 Steffen Klassert
2021-03-31  8:18 ` [PATCH 01/11] xfrm: interface: fix ipv4 pmtu check to honor ip header df Steffen Klassert
2021-03-31 22:00   ` patchwork-bot+netdevbpf
2021-03-31  8:18 ` [PATCH 02/11] vti: " Steffen Klassert
2021-03-31  8:18 ` [PATCH 03/11] vti6: " Steffen Klassert
2021-03-31  8:18 ` [PATCH 04/11] xfrm: Use actual socket sk instead of skb socket for xfrm_output_resume Steffen Klassert
2021-03-31  8:18 ` [PATCH 05/11] net: xfrm: Localize sequence counter per network namespace Steffen Klassert
2021-03-31  8:18 ` [PATCH 06/11] net: xfrm: Use sequence counter with associated spinlock Steffen Klassert
2021-03-31  8:18 ` [PATCH 07/11] esp: delete NETIF_F_SCTP_CRC bit from features for esp offload Steffen Klassert
2021-03-31  8:18 ` [PATCH 08/11] xfrm: BEET mode doesn't support fragments for inner packets Steffen Klassert
2021-03-31  8:18 ` [PATCH 09/11] xfrm: Fix NULL pointer dereference on policy lookup Steffen Klassert
2021-03-31  8:18 ` Steffen Klassert [this message]
2021-03-31  8:18 ` [PATCH 11/11] xfrm/compat: Cleanup WARN()s that can be user-triggered Steffen Klassert
2021-03-31 22:00 ` pull request (net): ipsec 2021-03-31 patchwork-bot+netdevbpf

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