[PATCH 6/6 RFC] netfilter: add audit netns ID

[Pablo Neira Ayuso]

Cc'ing Eric Biederman.

On Thu, May 18, 2017 at 01:21:52PM -0400, Richard Guy Briggs wrote:
> diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
> index 59b63a8..0f77b2a 100644
> --- a/net/bridge/netfilter/ebtables.c
> +++ b/net/bridge/netfilter/ebtables.c
> @@ -27,6 +27,7 @@
>  #include <linux/smp.h>
>  #include <linux/cpumask.h>
>  #include <linux/audit.h>
> +#define PROC_DYNAMIC_FIRST 0xF0000000U
>  #include <net/sock.h>
>  /* needed for logical [in,out]-dev filtering */
>  #include "../br_private.h"
> @@ -1075,7 +1076,8 @@ static int do_replace_finish(struct net *net, struct ebt_replace *repl,
>  			ab = audit_log_start(current->audit_context, GFP_KERNEL,
>  					     AUDIT_NETFILTER_CFG);
>  			if (ab) {
> -				audit_log_format(ab, "op=replace family=%u table=%s entries=%u",
> +				audit_log_format(ab, "op=replace net=%u family=%u table=%s entries=%u",
> +						 net->ns.inum - PROC_DYNAMIC_FIRST,

IIRC, there was a discussion on exposing netns i-node number to
userspace time ago on netdev and Eric Biederman was not happy about
this?