From: Steffen Klassert <steffen.klassert@secunet.com>
To: David Miller <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Steffen Klassert <steffen.klassert@secunet.com>,
<netdev@vger.kernel.org>
Subject: [PATCH 3/6] xfrm: reset transport header back to network header after all input transforms ahave been applied
Date: Mon, 1 Oct 2018 10:58:52 +0200 [thread overview]
Message-ID: <20181001085855.12057-4-steffen.klassert@secunet.com> (raw)
In-Reply-To: <20181001085855.12057-1-steffen.klassert@secunet.com>
From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
A policy may have been set up with multiple transforms (e.g., ESP
and ipcomp). In this situation, the ingress IPsec processing
iterates in xfrm_input() and applies each transform in turn,
processing the nexthdr to find any additional xfrm that may apply.
This patch resets the transport header back to network header
only after the last transformation so that subsequent xfrms
can find the correct transport header.
Fixes: 7785bba299a8 ("esp: Add a software GRO codepath")
Suggested-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---
net/ipv4/xfrm4_input.c | 1 +
net/ipv4/xfrm4_mode_transport.c | 4 +---
net/ipv6/xfrm6_input.c | 1 +
net/ipv6/xfrm6_mode_transport.c | 4 +---
4 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index bcfc00e88756..f8de2482a529 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -67,6 +67,7 @@ int xfrm4_transport_finish(struct sk_buff *skb, int async)
if (xo && (xo->flags & XFRM_GRO)) {
skb_mac_header_rebuild(skb);
+ skb_reset_transport_header(skb);
return 0;
}
diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c
index 3d36644890bb..1ad2c2c4e250 100644
--- a/net/ipv4/xfrm4_mode_transport.c
+++ b/net/ipv4/xfrm4_mode_transport.c
@@ -46,7 +46,6 @@ static int xfrm4_transport_output(struct xfrm_state *x, struct sk_buff *skb)
static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
int ihl = skb->data - skb_transport_header(skb);
- struct xfrm_offload *xo = xfrm_offload(skb);
if (skb->transport_header != skb->network_header) {
memmove(skb_transport_header(skb),
@@ -54,8 +53,7 @@ static int xfrm4_transport_input(struct xfrm_state *x, struct sk_buff *skb)
skb->network_header = skb->transport_header;
}
ip_hdr(skb)->tot_len = htons(skb->len + ihl);
- if (!xo || !(xo->flags & XFRM_GRO))
- skb_reset_transport_header(skb);
+ skb_reset_transport_header(skb);
return 0;
}
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index 841f4a07438e..9ef490dddcea 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -59,6 +59,7 @@ int xfrm6_transport_finish(struct sk_buff *skb, int async)
if (xo && (xo->flags & XFRM_GRO)) {
skb_mac_header_rebuild(skb);
+ skb_reset_transport_header(skb);
return -1;
}
diff --git a/net/ipv6/xfrm6_mode_transport.c b/net/ipv6/xfrm6_mode_transport.c
index 9ad07a91708e..3c29da5defe6 100644
--- a/net/ipv6/xfrm6_mode_transport.c
+++ b/net/ipv6/xfrm6_mode_transport.c
@@ -51,7 +51,6 @@ static int xfrm6_transport_output(struct xfrm_state *x, struct sk_buff *skb)
static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
{
int ihl = skb->data - skb_transport_header(skb);
- struct xfrm_offload *xo = xfrm_offload(skb);
if (skb->transport_header != skb->network_header) {
memmove(skb_transport_header(skb),
@@ -60,8 +59,7 @@ static int xfrm6_transport_input(struct xfrm_state *x, struct sk_buff *skb)
}
ipv6_hdr(skb)->payload_len = htons(skb->len + ihl -
sizeof(struct ipv6hdr));
- if (!xo || !(xo->flags & XFRM_GRO))
- skb_reset_transport_header(skb);
+ skb_reset_transport_header(skb);
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2018-10-01 15:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 8:58 pull request (net): ipsec 2018-10-01 Steffen Klassert
2018-10-01 8:58 ` [PATCH 1/6] xfrm: Validate address prefix lengths in the xfrm selector Steffen Klassert
2018-10-01 8:58 ` [PATCH 2/6] xfrm6: call kfree_skb when skb is toobig Steffen Klassert
2018-10-01 8:58 ` Steffen Klassert [this message]
2018-10-01 8:58 ` [PATCH 4/6] xfrm: reset crypto_done when iterating over multiple input xfrms Steffen Klassert
2018-10-01 8:58 ` [PATCH 5/6] xfrm: Fix NULL pointer dereference when skb_dst_force clears the dst_entry Steffen Klassert
2018-10-01 11:29 ` Sergei Shtylyov
2018-10-01 8:58 ` [PATCH 6/6] xfrm: validate template mode Steffen Klassert
2018-10-02 5:29 ` pull request (net): ipsec 2018-10-01 David Miller
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