Re: [PATCH v20 17/23] LSM: security_secid_to_secctx in netlink netfilter

[Pablo Neira Ayuso <pablo@netfilter.org>]

On Wed, Aug 26, 2020 at 07:52:41AM -0700, Casey Schaufler wrote:
> Change netlink netfilter interfaces to use lsmcontext
> pointers, and remove scaffolding.
> 
> Reviewed-by: Kees Cook <keescook@chromium.org>
> Reviewed-by: John Johansen <john.johansen@canonical.com>
> Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
> cc: netdev@vger.kernel.org
> ---
>  net/netfilter/nfnetlink_queue.c | 31 ++++++++++++-------------------
>  1 file changed, 12 insertions(+), 19 deletions(-)
> 
[...]
>  static u32 nfqnl_get_bridge_size(struct nf_queue_entry *entry)
> @@ -401,8 +399,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
>  	enum ip_conntrack_info ctinfo;
>  	struct nfnl_ct_hook *nfnl_ct;
>  	bool csum_verify;
> -	struct lsmcontext scaff; /* scaffolding */
> -	char *secdata = NULL;
> +	struct lsmcontext context = { };
>  	u32 seclen = 0;

While at it, please introduce reverse xmas tree in variable
definitions incrementally:

	struct lsmcontext context = { };
  	enum ip_conntrack_info ctinfo;
  	struct nfnl_ct_hook *nfnl_ct;
  	bool csum_verify;
 	u32 seclen = 0;

And Cc: netfilter-devel@vger.kernel.org for patches that update the
Netfilter codebase.

Thanks.