linux-kernel - [PATCH] usb: phy: phy-tahvo: fix memory leak in tahvo_usb

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Message-Id: <20230418090758.18756-1-lidaxian@hust.edu.cn>
Date:   Tue, 18 Apr 2023 17:07:57 +0800
From:   Li Yang <lidaxian@...t.edu.cn>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Sergey Shtylyov <s.shtylyov@....ru>
Cc:     Li Yang <lidaxian@...t.edu.cn>, Dongliang Mu <dzm91@...t.edu.cn>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: phy: phy-tahvo: fix memory leak in tahvo_usb_probe()

Smatch reports:
drivers/usb/phy/phy-tahvo.c: tahvo_usb_probe()
warn: missing unwind goto?

After geting irq, if ret < 0, it will return without error handling to
free memory.
Just add error handling to fix this problem.

Fixes: 0d45a1373e66 ("usb: phy: tahvo: add IRQ check")
Signed-off-by: Li Yang <lidaxian@...t.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@...t.edu.cn>
---
The issue is found by static analysis, and the patch remains untest.
---
 drivers/usb/phy/phy-tahvo.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/phy/phy-tahvo.c b/drivers/usb/phy/phy-tahvo.c
index f2d2cc586c5b..184a5f3d7473 100644
--- a/drivers/usb/phy/phy-tahvo.c
+++ b/drivers/usb/phy/phy-tahvo.c
@@ -390,8 +390,11 @@ static int tahvo_usb_probe(struct platform_device *pdev)
 	dev_set_drvdata(&pdev->dev, tu);
 
 	tu->irq = ret = platform_get_irq(pdev, 0);
-	if (ret < 0)
-		return ret;
+	if (ret < 0) {
+		dev_err(&pdev->dev, "could not get irq: %d\n",
+				ret);
+		goto err_remove_phy;
+	}
 	ret = request_threaded_irq(tu->irq, NULL, tahvo_usb_vbus_interrupt,
 				   IRQF_ONESHOT,
 				   "tahvo-vbus", tu);
-- 
2.34.1