linux-kernel - [PATCH 5.10 26/54] net: atlantic: fix potential memory leak in aq_ndev

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Message-Id: <20221013175147.992299917@linuxfoundation.org>
Date:   Thu, 13 Oct 2022 19:52:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jianglei Nie <niejianglei2021@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 26/54] net: atlantic: fix potential memory leak in aq_ndev_close()

From: Jianglei Nie <niejianglei2021@....com>

[ Upstream commit 65e5d27df61283e5390f04b09dc79cd832f95607 ]

If aq_nic_stop() fails, aq_ndev_close() returns err without calling
aq_nic_deinit() to release the relevant memory and resource, which
will lead to a memory leak.

We can fix it by deleting the if condition judgment and goto statement to
call aq_nic_deinit() directly after aq_nic_stop() to fix the memory leak.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/aquantia/atlantic/aq_main.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_main.c b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
index 4af0cd9530de..ff245f75fa3d 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_main.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
@@ -89,11 +89,8 @@ static int aq_ndev_close(struct net_device *ndev)
 	int err = 0;
 
 	err = aq_nic_stop(aq_nic);
-	if (err < 0)
-		goto err_exit;
 	aq_nic_deinit(aq_nic, true);
 
-err_exit:
 	return err;
 }
 
-- 
2.35.1