ping
On Mon, Aug 30, 2010 at 2:18 PM, steven.miao <[email protected]> wrote:
> From: realmz <[email protected]>
>
> In function l2cap_get_conf_opt() and l2cap_add_conf_opt() the address of
> opt->val sometimes is not at the edge of 2-bytes/4-bytes, so 2-bytes/4 bytes
> access will cause data misalignment exeception. Use get_unaligned_le16/32
> and put_unaligned_le16/32 function to avoid data misalignment execption.
> ---
> net/bluetooth/l2cap.c | 8 ++++----
> 1 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
> index fadf26b..a07dad8 100644
> --- a/net/bluetooth/l2cap.c
> +++ b/net/bluetooth/l2cap.c
> @@ -2406,11 +2406,11 @@ static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned
> break;
>
> case 2:
> - *val = __le16_to_cpu(*((__le16 *) opt->val));
> + *val = get_unaligned_le16(opt->val);
> break;
>
> case 4:
> - *val = __le32_to_cpu(*((__le32 *) opt->val));
> + *val = get_unaligned_le32(opt->val);
> break;
>
> default:
> @@ -2437,11 +2437,11 @@ static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
> break;
>
> case 2:
> - *((__le16 *) opt->val) = cpu_to_le16(val);
> + put_unaligned_le16(cpu_to_le16(val), opt->val);
> break;
>
> case 4:
> - *((__le32 *) opt->val) = cpu_to_le32(val);
> + put_unaligned_le32(cpu_to_le32(val), opt->val);
> break;
>
> default:
> --
> 1.5.6.5
>
>