netdev - [PATCH net-next v3 1/3] net/mlx5e: check return value of rhashtable

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Date:   Sat, 25 Sep 2021 06:05:07 +0000
From:   MichelleJin <shjy180909@...il.com>
To:     avem@...emloft.net, kuba@...nel.org, yoshfuji@...ux-ipv6.org,
        dsahern@...nel.org, johannes@...solutions.net
Cc:     saeedm@...dia.com, leon@...nel.org, roid@...dia.com,
        paulb@...dia.com, ozsh@...dia.com, vladbu@...dia.com,
        lariel@...dia.com, cmi@...dia.com, netdev@...r.kernel.org
Subject: [PATCH net-next v3 1/3] net/mlx5e: check return value of rhashtable_init

When rhashtable_init() fails, it returns -EINVAL.
However, since error return value of rhashtable_init is not checked,
it can cause use of uninitialized pointers.
So, fix unhandled errors of rhashtable_init.

Signed-off-by: MichelleJin <shjy180909@...il.com>
---

v1->v2:
 - change commit message
 - fix unneeded destroying of ht
v2->v3:
 - nothing changed

 drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
index 6c949abcd2e1..225748a9e52a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
@@ -2127,12 +2127,20 @@ mlx5_tc_ct_init(struct mlx5e_priv *priv, struct mlx5_fs_chains *chains,
 
 	ct_priv->post_act = post_act;
 	mutex_init(&ct_priv->control_lock);
-	rhashtable_init(&ct_priv->zone_ht, &zone_params);
-	rhashtable_init(&ct_priv->ct_tuples_ht, &tuples_ht_params);
-	rhashtable_init(&ct_priv->ct_tuples_nat_ht, &tuples_nat_ht_params);
+	if (rhashtable_init(&ct_priv->zone_ht, &zone_params))
+		goto err_ct_zone_ht;
+	if (rhashtable_init(&ct_priv->ct_tuples_ht, &tuples_ht_params))
+		goto err_ct_tuples_ht;
+	if (rhashtable_init(&ct_priv->ct_tuples_nat_ht, &tuples_nat_ht_params))
+		goto err_ct_tuples_nat_ht;
 
 	return ct_priv;
 
+err_ct_tuples_nat_ht:
+	rhashtable_destroy(&ct_priv->ct_tuples_ht);
+err_ct_tuples_ht:
+	rhashtable_destroy(&ct_priv->zone_ht);
+err_ct_zone_ht:
 err_ct_nat_tbl:
 	mlx5_chains_destroy_global_table(chains, ct_priv->ct);
 err_ct_tbl:
-- 
2.25.1