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Message-Id: <20230904081210.23901-1-nichen@iscas.ac.cn>
Date: Mon, 4 Sep 2023 08:12:10 +0000
From: Chen Ni <nichen@...as.ac.cn>
To: borisp@...dia.com, saeedm@...dia.com, leon@...nel.org,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com, sd@...asysnail.net, raeds@...dia.com,
ehakim@...dia.com, liorna@...dia.com, phaddad@...dia.com,
atenart@...nel.org
Cc: netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
linux-kernel@...r.kernel.org, Chen Ni <nichen@...as.ac.cn>
Subject: [PATCH] net/mlx5e: Add missing check for xa_load
Add check for xa_load() in order to avoid NULL pointer
dereference.
Fixes: b7c9400cbc48 ("net/mlx5e: Implement MACsec Rx data path using MACsec skb_metadata_dst")
Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
.../net/ethernet/mellanox/mlx5/core/en_accel/macsec.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index c9c1db971652..d2467c0bc3c8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -1673,10 +1673,12 @@ void mlx5e_macsec_offload_handle_rx_skb(struct net_device *netdev,
rcu_read_lock();
sc_xarray_element = xa_load(&macsec->sc_xarray, fs_id);
- rx_sc = sc_xarray_element->rx_sc;
- if (rx_sc) {
- dst_hold(&rx_sc->md_dst->dst);
- skb_dst_set(skb, &rx_sc->md_dst->dst);
+ if (sc_xarray_element) {
+ rx_sc = sc_xarray_element->rx_sc;
+ if (rx_sc) {
+ dst_hold(&rx_sc->md_dst->dst);
+ skb_dst_set(skb, &rx_sc->md_dst->dst);
+ }
}
rcu_read_unlock();
--
2.25.1
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