Le 17/01/2019 à 23:52, Jakub Kicinski a écrit :
> Make RTM_GETNSID's doit handler use strict checks when
> NETLINK_F_STRICT_CHK is set.
>
> Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
> ---
> CC: ktk...@virtuozzo.com
> CC: nicolas.dich...@6wind.com
> ---
> net/core/net_namespace.c | 43 ++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 41 insertions(+), 2 deletions(-)
>
> diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
> index b02fb19df2cc..1b45e3ab2b65 100644
> --- a/net/core/net_namespace.c
> +++ b/net/core/net_namespace.c
> @@ -778,6 +778,46 @@ static int rtnl_net_fill(struct sk_buff *skb, struct
> net_fill_args *args)
> return -EMSGSIZE;
> }
>
> +static int rtnl_net_valid_getid_req(struct sk_buff *skb,
> + const struct nlmsghdr *nlh,
> + struct nlattr **tb,
> + struct netlink_ext_ack *extack)
> +{
> + int i, err;
> +
> + if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct rtgenmsg))) {
This is not possible, the check is already done in rtnetlink_rcv_msg().
Regards,
Nicolas
