netdev - Re: [patch -mainline] af_key: more info leaks in pfkey messages

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Date:	Thu, 25 Jul 2013 09:15:15 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Steffen Klassert <steffen.klassert@...unet.com>,
	Herbert Xu <herbert@...dor.hengli.com.au>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch -mainline] af_key: more info leaks in pfkey messages

On 24 July 2013 12:39, Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> This is inspired by a5cc68f3d6 "af_key: fix info leaks in notify
> messages".  There are some struct members which don't get initialized
> and could disclose small amounts of private information.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
> I'm at the "monkey see, monkey do" level of understanding this code so
> let me know if I've missed something.
>
> diff --git a/net/key/af_key.c b/net/key/af_key.c
> index 456b262..e939d32 100644
> --- a/net/key/af_key.c
> +++ b/net/key/af_key.c
> @@ -2081,6 +2081,7 @@ static int pfkey_xfrm_policy2msg(struct sk_buff *skb, const struct xfrm_policy *
>                         pol->sadb_x_policy_type = IPSEC_POLICY_NONE;
>         }
>         pol->sadb_x_policy_dir = dir+1;
> +       pol->sadb_x_policy_reserved = 0;
>         pol->sadb_x_policy_id = xp->index;
>         pol->sadb_x_policy_priority = xp->priority;
>
> @@ -3137,7 +3138,9 @@ static int pfkey_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *t, struct
>         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
>         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
>         pol->sadb_x_policy_dir = XFRM_POLICY_OUT + 1;
> +       pol->sadb_x_policy_reserved = 0;
>         pol->sadb_x_policy_id = xp->index;
> +       pol->sadb_x_policy_priority = 0;
>
>         /* Set sadb_comb's. */
>         if (x->id.proto == IPPROTO_AH)
> @@ -3525,6 +3528,7 @@ static int pfkey_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
>         pol->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
>         pol->sadb_x_policy_type = IPSEC_POLICY_IPSEC;
>         pol->sadb_x_policy_dir = dir + 1;
> +       pol->sadb_x_policy_reserved = 0;
>         pol->sadb_x_policy_id = 0;
>         pol->sadb_x_policy_priority = 0;
>

Looks good to me. All end up being send to userland over the PF_KEY interface.

Acked-by: Mathias Krause <minipli@...glemail.com>
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