linux-kernel - Re: [RFC PATCH ghak32 V2 10/13] audit: add containerid support for seccomp and anom

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Date:   Wed, 18 Apr 2018 21:31:50 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Richard Guy Briggs <rgb@...hat.com>
Cc:     cgroups@...r.kernel.org, containers@...ts.linux-foundation.org,
        linux-api@...r.kernel.org,
        Linux-Audit Mailing List <linux-audit@...hat.com>,
        linux-fsdevel@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        netdev@...r.kernel.org, ebiederm@...ssion.com, luto@...nel.org,
        jlayton@...hat.com, carlos@...hat.com, dhowells@...hat.com,
        viro@...iv.linux.org.uk, simo@...hat.com,
        Eric Paris <eparis@...isplace.org>, serge@...lyn.com
Subject: Re: [RFC PATCH ghak32 V2 10/13] audit: add containerid support for
 seccomp and anom_abend records

On Fri, Mar 16, 2018 at 5:00 AM, Richard Guy Briggs <rgb@...hat.com> wrote:
> Add container ID auxiliary records to secure computing and abnormal end
> standalone records.
>
> Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
> ---
>  kernel/auditsc.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> index 7103d23..2f02ed9 100644
> --- a/kernel/auditsc.c
> +++ b/kernel/auditsc.c
> @@ -2571,6 +2571,7 @@ static void audit_log_task(struct audit_buffer *ab)
>  void audit_core_dumps(long signr)
>  {
>         struct audit_buffer *ab;
> +       struct audit_context *context = audit_alloc_local();

Looking quickly at do_coredump() I *believe* we can use current here.

>         if (!audit_enabled)
>                 return;
> @@ -2578,19 +2579,22 @@ void audit_core_dumps(long signr)
>         if (signr == SIGQUIT)   /* don't care for those */
>                 return;
>
> -       ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
> +       ab = audit_log_start(context, GFP_KERNEL, AUDIT_ANOM_ABEND);
>         if (unlikely(!ab))
>                 return;
>         audit_log_task(ab);
>         audit_log_format(ab, " sig=%ld res=1", signr);
>         audit_log_end(ab);
> +       audit_log_container_info(context, "abend", audit_get_containerid(current));
> +       audit_free_context(context);
>  }
>
>  void __audit_seccomp(unsigned long syscall, long signr, int code)
>  {
>         struct audit_buffer *ab;
> +       struct audit_context *context = audit_alloc_local();

We can definitely use current here.

> -       ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_SECCOMP);
> +       ab = audit_log_start(context, GFP_KERNEL, AUDIT_SECCOMP);
>         if (unlikely(!ab))
>                 return;
>         audit_log_task(ab);
> @@ -2598,6 +2602,8 @@ void __audit_seccomp(unsigned long syscall, long signr, int code)
>                          signr, syscall_get_arch(), syscall,
>                          in_compat_syscall(), KSTK_EIP(current), code);
>         audit_log_end(ab);
> +       audit_log_container_info(context, "seccomp", audit_get_containerid(current));
> +       audit_free_context(context);
>  }
>
>  struct list_head *audit_killed_trees(void)

-- 
paul moore
www.paul-moore.com