On Wed, 28 May 2014 10:39:02 -0700, Florian Fainelli <[email protected]>
wrote:
> Add an early check for the node argument in __of_get_next_child and
> of_get_next_available_child() to avoid dereferencing a NULL node pointer
> a few lines after.
>
> CC: Daniel Mack <[email protected]>
> Signed-off-by: Florian Fainelli <[email protected]>
Applied, thanks.
g
> ---
> Changes in v2:
> - also fix __of_get_next_child against NULL node argument
>
> drivers/of/base.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index e67b308819c9..567e6e1b7921 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -700,6 +700,9 @@ static struct device_node *__of_get_next_child(const
> struct device_node *node,
> {
> struct device_node *next;
>
> + if (!node)
> + return NULL;
> +
> next = prev ? prev->sibling : node->child;
> for (; next; next = next->sibling)
> if (of_node_get(next))
> @@ -746,6 +749,9 @@ struct device_node *of_get_next_available_child(const
> struct device_node *node,
> struct device_node *next;
> unsigned long flags;
>
> + if (!node)
> + return NULL;
> +
> raw_spin_lock_irqsave(&devtree_lock, flags);
> next = prev ? prev->sibling : node->child;
> for (; next; next = next->sibling) {
> --
> 1.9.1
>
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