Re: [PATCH] dlpar: Fix a missing-check bug in dlpar_parse_cc_property()

[Nathan Lynch <nathanl@linux.ibm.com>]

Gen Zhang <blackgod016574@gmail.com> writes:
> In dlpar_parse_cc_property(), 'prop->name' is allocated by kstrdup().
> kstrdup() may return NULL, so it should be checked and handle error.
> And prop should be freed if 'prop->name' is NULL.
>
> Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
> ---
> diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
> index 1795804..c852024 100644
> --- a/arch/powerpc/platforms/pseries/dlpar.c
> +++ b/arch/powerpc/platforms/pseries/dlpar.c
> @@ -61,6 +61,10 @@ static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa)
>  
>  	name = (char *)ccwa + be32_to_cpu(ccwa->name_offset);
>  	prop->name = kstrdup(name, GFP_KERNEL);
> +	if (!prop->name) {
> +		dlpar_free_cc_property(prop);
> +		return NULL;
> +	}

Acked-by: Nathan Lynch <nathanl@linux.ibm.com>