linux-kernel - [PATCH AUTOSEL 5.15 18/18] net: sfp: fix memory leak in sfp

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Message-Id: <20220706153153.1598076-18-sashal@kernel.org>
Date:   Wed,  6 Jul 2022 11:31:53 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jianglei Nie <niejianglei2021@....com>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Paolo Abeni <pabeni@...hat.com>,
        Sasha Levin <sashal@...nel.org>, linux@...linux.org.uk,
        andrew@...n.ch, hkallweit1@...il.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 18/18] net: sfp: fix memory leak in sfp_probe()

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

[ Upstream commit 0a18d802d65cf662644fd1d369c86d84a5630652 ]

sfp_probe() allocates a memory chunk from sfp with sfp_alloc(). When
devm_add_action() fails, sfp is not freed, which leads to a memory leak.

We should use devm_add_action_or_reset() instead of devm_add_action().

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Link: https://lore.kernel.org/r/20220629075550.2152003-1-niejianglei2021@163.com
Signed-off-by: Paolo Abeni <pabeni@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/phy/sfp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index 90dfefc1f5f8..028a5df5c538 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -2504,7 +2504,7 @@ static int sfp_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, sfp);
 
-	err = devm_add_action(sfp->dev, sfp_cleanup, sfp);
+	err = devm_add_action_or_reset(sfp->dev, sfp_cleanup, sfp);
 	if (err < 0)
 		return err;
 
-- 
2.35.1