could you please code review for this patch?
On 11/10/2021 8:09 PM, Zijun Hu wrote:
> From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
>
> it is erroneous to calculate padding by subtracting length of type
> indication from skb->len, it will cause data analysis error for
> alignment which is greater than 1, so fixed by adding length of type
> indication with skb->len.
>
> Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
> ---
> drivers/bluetooth/hci_h4.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_h4.c b/drivers/bluetooth/hci_h4.c
> index 4b3b14a34794..1d0cdf023243 100644
> --- a/drivers/bluetooth/hci_h4.c
> +++ b/drivers/bluetooth/hci_h4.c
> @@ -252,7 +252,7 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
> }
>
> if (!dlen) {
> - hu->padding = (skb->len - 1) % alignment;
> + hu->padding = (skb->len + 1) % alignment;
> hu->padding = (alignment - hu->padding) % alignment;
>
> /* No more data, complete frame */
> @@ -260,7 +260,7 @@ struct sk_buff *h4_recv_buf(struct hci_dev *hdev, struct sk_buff *skb,
> skb = NULL;
> }
> } else {
> - hu->padding = (skb->len - 1) % alignment;
> + hu->padding = (skb->len + 1) % alignment;
> hu->padding = (alignment - hu->padding) % alignment;
>
> /* Complete frame */
>
