netdev - [net 08/11] net/mlx5e: Fix skb memory leak when TC classifier action offloads are disabled

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Message-Id: <20211222211201.77469-9-saeed@kernel.org>
Date:   Wed, 22 Dec 2021 13:11:58 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Roi Dayan <roid@...dia.com>,
        Gal Pressman <gal@...dia.com>,
        Ariel Levkovich <lariel@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [net 08/11] net/mlx5e: Fix skb memory leak when TC classifier action offloads are disabled

From: Gal Pressman <gal@...dia.com>

When TC classifier action offloads are disabled (CONFIG_MLX5_CLS_ACT in
Kconfig), the mlx5e_rep_tc_receive() function which is responsible for
passing the skb to the stack (or freeing it) is defined as a nop, and
results in leaking the skb memory. Replace the nop with a call to
napi_gro_receive() to resolve the leak.

Fixes: 28e7606fa8f1 ("net/mlx5e: Refactor rx handler of represetor device")
Signed-off-by: Gal Pressman <gal@...dia.com>
Reviewed-by: Ariel Levkovich <lariel@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.h b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.h
index d6c7c81690eb..7c9dd3a75f8a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.h
@@ -66,7 +66,7 @@ mlx5e_rep_setup_tc(struct net_device *dev, enum tc_setup_type type,
 
 static inline void
 mlx5e_rep_tc_receive(struct mlx5_cqe64 *cqe, struct mlx5e_rq *rq,
-		     struct sk_buff *skb) {}
+		     struct sk_buff *skb) { napi_gro_receive(rq->cq.napi, skb); }
 
 #endif /* CONFIG_MLX5_CLS_ACT */
 
-- 
2.33.1