Re: [PATCH 2/2] staging: vt6656: Make 'rx_rate' u8 instead of u8 *

From: Dan Carpenter
Date: Wed Sep 28 2016 - 03:41:05 EST


On Tue, Sep 27, 2016 at 02:52:49PM -0300, Martin Alonso wrote:
> Change the type and uses of rx_rate.
>
> Signed-off-by: Martin Alonso <martin.alonso@xxxxxxxx>
> ---
> drivers/staging/vt6656/dpc.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/staging/vt6656/dpc.c b/drivers/staging/vt6656/dpc.c
> index 655f000..782b7d7 100644
> --- a/drivers/staging/vt6656/dpc.c
> +++ b/drivers/staging/vt6656/dpc.c
> @@ -46,7 +46,8 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
> __le64 *tsf_time;
> u32 frame_size;
> int ii, r;
> - u8 *rx_rate, *sq, *sq_3;
> + u8 rx_rate;
> + u8 *sq, *sq_3;
> u32 wbk_status;
> u8 *skb_data;
> u16 *pay_load_len;
> @@ -75,7 +76,7 @@ int vnt_rx_data(struct vnt_private *priv, struct vnt_rcb *ptr_rcb,
>
> skb_data = (u8 *)skb->data;
>
> - rx_rate = skb_data + 5;
> + rx_rate = *(skb_data + 5);

It occurs to me that we don't check that skb->len is large enough here.
We just assume it has at least 5 bytes.

TODO: vt6656: verify skb->len before using it.

regards,
dan carpenter