On Wed, Feb 03, 2016 at 11:33:30PM +0800, Xin Long wrote:
> Commit ed5a377d87dc ("sctp: translate host order to network order when
> setting a hmacid") corrected the hmacid byte-order when setting a hmacid.
> but the same issue also exists on getting a hmacid.
>
> We fix it by changing hmacids to host order when users get them with
> getsockopt.
>
> Fixes: Commit ed5a377d87dc ("sctp: translate host order to network order when setting a hmacid")
> Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
> ---
> net/sctp/socket.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index 5ca2ebf..e878da0 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -5538,6 +5538,7 @@ static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
> struct sctp_hmac_algo_param *hmacs;
> __u16 data_len = 0;
> u32 num_idents;
> + int i;
>
> if (!ep->auth_enable)
> return -EACCES;
> @@ -5555,8 +5556,12 @@ static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
> return -EFAULT;
> if (put_user(num_idents, &p->shmac_num_idents))
> return -EFAULT;
> - if (copy_to_user(p->shmac_idents, hmacs->hmac_ids, data_len))
> - return -EFAULT;
> + for (i = 0; i < num_idents; i++) {
> + __u16 hmacid = ntohs(hmacs->hmac_ids[i]);
> +
> + if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
> + return -EFAULT;
> + }
> return 0;
> }
>
> --
> 2.1.0
>
> --
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