Re: [PATCH] usb: phy: phy-tahvo: fix memory leak in tahvo_usb_probe()

[李阳]

> -----Original Messages-----
> From: "Li Yang" <lidaxian@xxxxxxxxxxx>
> Sent Time: 2023-04-18 17:07:57 (Tuesday)
> To: "Greg Kroah-Hartman" <gregkh@xxxxxxxxxxxxxxxxxxx>, "Felipe Balbi" <balbi@xxxxxxxxxx>, "Sergey Shtylyov" <s.shtylyov@xxxxxx>
> Cc: "Li Yang" <lidaxian@xxxxxxxxxxx>, "Dongliang Mu" <dzm91@xxxxxxxxxxx>, linux-usb@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
> 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@xxxxxxxxxxx>
> Reviewed-by: Dongliang Mu <dzm91@xxxxxxxxxxx>
> ---
> 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
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