linux-kernel - Re: [PATCH] platform/x86: intel_pmc_core: fix memleak on registration failure

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Message-ID: <YcMGkaGP2m4wyCYi@kroah.com>
Date:   Wed, 22 Dec 2021 12:05:53 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
        David E Box <david.e.box@...el.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] platform/x86: intel_pmc_core: fix memleak on
 registration failure

On Wed, Dec 22, 2021 at 11:50:23AM +0100, Johan Hovold wrote:
> In case device registration fails during module initialisation, the
> platform device structure needs to be freed using platform_device_put()
> to properly free all resources (e.g. the device name).
> 
> Fixes: 938835aa903a ("platform/x86: intel_pmc_core: do not create a static struct device")
> Cc: stable@...r.kernel.org      # 5.9
> Signed-off-by: Johan Hovold <johan@...nel.org>
> ---
>  drivers/platform/x86/intel/pmc/pltdrv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/platform/x86/intel/pmc/pltdrv.c b/drivers/platform/x86/intel/pmc/pltdrv.c
> index 73797680b895..15ca8afdd973 100644
> --- a/drivers/platform/x86/intel/pmc/pltdrv.c
> +++ b/drivers/platform/x86/intel/pmc/pltdrv.c
> @@ -65,7 +65,7 @@ static int __init pmc_core_platform_init(void)
>  
>  	retval = platform_device_register(pmc_core_device);
>  	if (retval)
> -		kfree(pmc_core_device);
> +		platform_device_put(pmc_core_device);
>  
>  	return retval;
>  }
> -- 
> 2.32.0
> 

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>