linux-kernel - Re: [PATCH 1/3] kernel/audit: consolidate handling of mm->exe

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Date:	Wed, 18 Feb 2015 22:23:45 -0500
From:	Paul Moore <paul@...l-moore.com>
To:	Davidlohr Bueso <dbueso@...e.de>
Cc:	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, dave@...olabs.net,
	Eric Paris <eparis@...hat.com>, linux-audit@...hat.com
Subject: Re: [PATCH 1/3] kernel/audit: consolidate handling of mm->exe_file

On Wed, Feb 18, 2015 at 7:10 PM, Davidlohr Bueso <dbueso@...e.de> wrote:
> From: Davidlohr Bueso <dave@...olabs.net>
>
> This patch adds a audit_log_d_path_exe() helper function
> to share how we handle auditing of the exe_file's path.
> Used by both audit and auditsc. No functionality is changed.
>
> Cc: Paul Moore <paul@...l-moore.com>
> Cc: Eric Paris <eparis@...hat.com>
> Cc: linux-audit@...hat.com
> Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
> ---
>
> Compile tested only.
>
>  kernel/audit.c   |  9 +--------
>  kernel/audit.h   | 14 ++++++++++++++
>  kernel/auditsc.c |  9 +--------
>  3 files changed, 16 insertions(+), 16 deletions(-)

I'd prefer if the audit_log_d_path_exe() helper wasn't a static inline.

> --- a/kernel/audit.h
> +++ b/kernel/audit.h
> @@ -257,6 +257,20 @@ extern struct list_head audit_filter_list[];
>
>  extern struct audit_entry *audit_dupe_rule(struct audit_krule *old);
>
> +static inline void audit_log_d_path_exe(struct audit_buffer *ab,
> +                                       struct mm_struct *mm)
> +{
> +       if (!mm) {
> +               audit_log_format(ab, " exe=(null)");
> +               return;
> +       }
> +
> +       down_read(&mm->mmap_sem);
> +       if (mm->exe_file)
> +               audit_log_d_path(ab, " exe=", &mm->exe_file->f_path);
> +       up_read(&mm->mmap_sem);
> +}
> +
>  /* audit watch functions */
>  #ifdef CONFIG_AUDIT_WATCH
>  extern void audit_put_watch(struct audit_watch *watch);

-- 
paul moore
www.paul-moore.com
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