linux-kernel - [PATCH] net/mlx4_core: fix a memory leak bug.

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Date:   Fri, 22 May 2020 00:23:48 -0500
From:   wu000273@....edu
To:     tariqt@...lanox.com
Cc:     davem@...emloft.net, kuba@...nel.org, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org, kjlu@....edu,
        wu000273@....edu
Subject: [PATCH] net/mlx4_core: fix a memory leak bug.

From: Qiushi Wu <wu000273@....edu>

In function mlx4_opreq_action(), pointer "mailbox" is not released,
when mlx4_cmd_box() return and error, causing a memory leak bug.
Fix this issue by going to "out" label, mlx4_free_cmd_mailbox() can
free this pointer.

Fixes: fe6f700d6cbb7 ("Respond to operation request by firmware")
Signed-off-by: Qiushi Wu <wu000273@....edu>
---
 drivers/net/ethernet/mellanox/mlx4/fw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 6e501af0e532..f6ff9620a137 100644
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -2734,7 +2734,7 @@ void mlx4_opreq_action(struct work_struct *work)
 		if (err) {
 			mlx4_err(dev, "Failed to retrieve required operation: %d\n",
 				 err);
-			return;
+			goto out;
 		}
 		MLX4_GET(modifier, outbox, GET_OP_REQ_MODIFIER_OFFSET);
 		MLX4_GET(token, outbox, GET_OP_REQ_TOKEN_OFFSET);
-- 
2.17.1