Re: [PATCH] libnvdimm/of_pmem: Fix leaking bus_desc.provider_name in some paths

[Jeff Moyer <jmoyer@redhat.com>]

Vaibhav Jain <vaibhav@linux.ibm.com> writes:

> String 'bus_desc.provider_name' allocated inside
> of_pmem_region_probe() will leak in case call to nvdimm_bus_register()
> fails or when of_pmem_region_remove() is called.
>
> This minor patch ensures that 'bus_desc.provider_name' is freed in
> error path for of_pmem_region_probe() as well as in
> of_pmem_region_remove().
>
> Cc: stable@vger.kernel.org
> Fixes:49bddc73d15c2("libnvdimm/of_pmem: Provide a unique name for bus provider")
> Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
> ---
>  drivers/nvdimm/of_pmem.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
> index 8224d1431ea9..9cb76f9837ad 100644
> --- a/drivers/nvdimm/of_pmem.c
> +++ b/drivers/nvdimm/of_pmem.c
> @@ -36,6 +36,7 @@ static int of_pmem_region_probe(struct platform_device *pdev)
>  
>  	priv->bus = bus = nvdimm_bus_register(&pdev->dev, &priv->bus_desc);
>  	if (!bus) {
> +		kfree(priv->bus_desc.provider_name);
>  		kfree(priv);
>  		return -ENODEV;
>  	}
> @@ -81,6 +82,7 @@ static int of_pmem_region_remove(struct platform_device *pdev)
>  	struct of_pmem_private *priv = platform_get_drvdata(pdev);
>  
>  	nvdimm_bus_unregister(priv->bus);
> +	kfree(priv->bus_desc.provider_name);
>  	kfree(priv);
>  
>  	return 0;

Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
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