[PATCH v2 1/2] OF: base: add sanity checks to of_new/delete_property

[Sascha Hauer]

On Mon, Jun 24, 2013 at 12:49:20PM +0200, Sebastian Hesselbarth wrote:
> This adds some sanity checks to of_new_property and of_delete_property.
> Also, value pointer is always allocated even with zero length to allow
> empty properties to be distinguished from non-existing properties.
> Finally, data passed to of_new_property is only copied if non-NULL.
> 
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth at gmail.com>

Applied both.

Thanks
 Sascha

> ---
> Note: Patch 3 of the former patch set has been dropped in favour of zero
> length allocation here.
> 
> Changelog:
> v1->v2:
> - remove unneccesary NULL checks after xzalloc (Suggested by Sascha Hauer)
> - allocate zero length value pointer (Suggested by Sascha Hauer)
> 
> Cc: barebox at lists.infradead.org
> ---
>  drivers/of/base.c |   15 +++++++++++----
>  1 files changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 1b351ee..e65cf85 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -1527,13 +1527,17 @@ struct property *of_new_property(struct device_node *node, const char *name,
>  	struct property *prop;
>  
>  	prop = xzalloc(sizeof(*prop));
> -
>  	prop->name = strdup(name);
> +	if (!prop->name) {
> +		free(prop);
> +		return NULL;
> +	}
> +
>  	prop->length = len;
> -	if (len) {
> -		prop->value = xzalloc(len);
> +	prop->value = xzalloc(len);
> +
> +	if (data)
>  		memcpy(prop->value, data, len);
> -	}
>  
>  	list_add_tail(&prop->list, &node->properties);
>  
> @@ -1542,6 +1546,9 @@ struct property *of_new_property(struct device_node *node, const char *name,
>  
>  void of_delete_property(struct property *pp)
>  {
> +	if (!pp)
> +		return;
> +
>  	list_del(&pp->list);
>  
>  	free(pp->name);
> -- 
> 1.7.2.5
> 
> 
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> 

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