On Thu, Nov 20, 2014 at 12:46:50PM +0800, Herbert Xu wrote:
> On Thu, Nov 20, 2014 at 05:23:23AM +0100, Stephan Mueller wrote:
> >
> > Here is the code:
> >
> > static int crypto_report(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
> > struct nlattr **attrs)
> > {
> > ...
> > if (!p->cru_driver_name[0])
> > return -EINVAL;
>
> OK let's fix this.
>
> crypto: user - Allow get request with empty driver name
>
> Currently all get requests with an empty driver name fail with
> EINVAL. Since most users actually want to supply an empty driver
> name this patch removes this check.
>
> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
>
> diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c
> index e2a34fe..0bb30ac 100644
> --- a/crypto/crypto_user.c
> +++ b/crypto/crypto_user.c
> @@ -201,10 +201,7 @@ static int crypto_report(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
> if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
> return -EINVAL;
>
> - if (!p->cru_driver_name[0])
> - return -EINVAL;
> -
> - alg = crypto_alg_match(p, 1);
> + alg = crypto_alg_match(p, 0);
I think this is not sufficient, crypto_alg_match() will now return the first
algorithm in crypto_alg_list that matches cra_name. We would need to extend
crypto_alg_match() to return the algorithm with the highest priority in that
case.
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