netdev - [PATCH net,v2] mlxsw: minimal: fix potential memory leak in mlxsw_m_linecards

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Date:   Wed, 28 Jun 2023 18:01:16 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <netdev@...r.kernel.org>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>
CC:     <idosch@...dia.com>, <petrm@...dia.com>, <jiri@...nulli.us>,
        <vadimp@...dia.com>, <yuehaibing@...wei.com>,
        <shaozhengchao@...wei.com>
Subject: [PATCH net,v2] mlxsw: minimal: fix potential memory leak in mlxsw_m_linecards_init

The line cards array is not freed in the error path of
mlxsw_m_linecards_init(), which can lead to a memory leak. Fix by
freeing the array in the error path, thereby making the error path
identical to mlxsw_m_linecards_fini().

Fixes: 01328e23a476 ("mlxsw: minimal: Extend module to port mapping with slot index")
Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
v2: modify commit message.
---
 drivers/net/ethernet/mellanox/mlxsw/minimal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/minimal.c b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
index 6b56eadd736e..6b98c3287b49 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/minimal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
@@ -417,6 +417,7 @@ static int mlxsw_m_linecards_init(struct mlxsw_m *mlxsw_m)
 err_kmalloc_array:
 	for (i--; i >= 0; i--)
 		kfree(mlxsw_m->line_cards[i]);
+	kfree(mlxsw_m->line_cards);
 err_kcalloc:
 	kfree(mlxsw_m->ports);
 	return err;
-- 
2.34.1