linux-kernel - [PATCH] net: atlantic: fix potential memory leak in aq_ndev

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Message-Id: <20220913063941.83611-1-niejianglei2021@163.com>
Date:   Tue, 13 Sep 2022 14:39:41 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     irusskikh@...vell.com, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jianglei Nie <niejianglei2021@....com>
Subject: [PATCH] net: atlantic: fix potential memory leak in aq_ndev_close()

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>
---
 drivers/net/ethernet/aquantia/atlantic/aq_main.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_main.c b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
index 88595863d8bc..362f8077ff97 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_main.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
@@ -94,8 +94,6 @@ 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:
-- 
2.25.1