netdev - [PATCH net] nfp: fix incorrect pointer deference when offloading IPsec with bonding

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Date:   Thu, 20 Apr 2023 16:01:25 +0200
From:   Louis Peens <louis.peens@...igine.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Steffen Klassert <steffen.klassert@...unet.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Leon Romanovsky <leon@...nel.org>,
        Simon Horman <simon.horman@...igine.com>,
        netdev@...r.kernel.org, stable@...r.kernel.org,
        oss-drivers@...igine.com
Subject: [PATCH net] nfp: fix incorrect pointer deference when offloading IPsec with bonding

From: Huanhuan Wang <huanhuan.wang@...igine.com>

There are two pointers in struct xfrm_dev_offload, *dev, *real_dev.
The *dev points whether bonding interface or real interface, if
bonding IPsec offload is used, it points bonding interface; if not,
it points real interface. And *real_dev always points real interface.
So nfp should always use real_dev instead of dev.

Prior to this change the system becomes unresponsive when offloading
IPsec for a device which is a lower device to a bonding device.

Fixes: 859a497fe80c ("nfp: implement xfrm callbacks and expose ipsec offload feature to upper layer")
CC: stable@...r.kernel.org
Signed-off-by: Huanhuan Wang <huanhuan.wang@...igine.com>
Acked-by: Simon Horman <simon.horman@...igine.com>
Signed-off-by: Louis Peens <louis.peens@...igine.com>
---
 drivers/net/ethernet/netronome/nfp/crypto/ipsec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c b/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
index c0dcce8ae437..b1f026b81dea 100644
--- a/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
+++ b/drivers/net/ethernet/netronome/nfp/crypto/ipsec.c
@@ -269,7 +269,7 @@ static void set_sha2_512hmac(struct nfp_ipsec_cfg_add_sa *cfg, int *trunc_len)
 static int nfp_net_xfrm_add_state(struct xfrm_state *x,
 				  struct netlink_ext_ack *extack)
 {
-	struct net_device *netdev = x->xso.dev;
+	struct net_device *netdev = x->xso.real_dev;
 	struct nfp_ipsec_cfg_mssg msg = {};
 	int i, key_len, trunc_len, err = 0;
 	struct nfp_ipsec_cfg_add_sa *cfg;
@@ -513,7 +513,7 @@ static void nfp_net_xfrm_del_state(struct xfrm_state *x)
 		.cmd = NFP_IPSEC_CFG_MSSG_INV_SA,
 		.sa_idx = x->xso.offload_handle - 1,
 	};
-	struct net_device *netdev = x->xso.dev;
+	struct net_device *netdev = x->xso.real_dev;
 	struct nfp_net *nn;
 	int err;
 
-- 
2.34.1