linux-kernel - [PATCH net v3] net: sfp: fix memory leak in sfp

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Date:   Wed, 29 Jun 2022 15:55:50 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     linux@...linux.org.uk, andrew@...n.ch, hkallweit1@...il.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 v3] net: sfp: fix memory leak in sfp_probe()

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>
---
 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 9a5d5a10560f..e7b0e12cc75b 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -2516,7 +2516,7 @@ 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;
 
-- 
2.25.1