linux-kernel - Re: [PATCH v3 3/3] selinux: add permission names to trace event

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Message-ID: <d8b1d7a2-2b8e-c714-77b6-d4e7f3fedf08@gmail.com>
Date:   Mon, 17 Aug 2020 16:16:28 -0400
From:   Stephen Smalley <stephen.smalley.work@...il.com>
To:     Thiébaud Weksteen <tweek@...gle.com>,
        Paul Moore <paul@...l-moore.com>
Cc:     Nick Kralevich <nnk@...gle.com>,
        Peter Enderborg <peter.enderborg@...y.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Eric Paris <eparis@...isplace.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>, linux-kernel@...r.kernel.org,
        selinux@...r.kernel.org
Subject: Re: [PATCH v3 3/3] selinux: add permission names to trace event

On 8/17/20 1:07 PM, Thiébaud Weksteen wrote:

> From: Peter Enderborg <peter.enderborg@...y.com>
>
> In the print out add permissions, it will look like:
>      <...>-1042  [007] ....   201.965142: selinux_audited:
>      requested=0x4000000 denied=0x4000000 audited=0x4000000
>      result=-13
>      scontext=system_u:system_r:cupsd_t:s0-s0:c0.c1023
>      tcontext=system_u:object_r:bin_t:s0
>      tclass=file permissions={ !entrypoint }
>
> This patch is adding the "permissions={ !entrypoint }".
> The permissions preceded by "!" have been denied and the permissions
> without have been accepted.
>
> Note that permission filtering is done on the audited, denied or
> requested attributes.
>
> Suggested-by: Steven Rostedt <rostedt@...dmis.org>
> Suggested-by: Stephen Smalley <stephen.smalley.work@...il.com>
> Reviewed-by: Thiébaud Weksteen <tweek@...gle.com>
> Signed-off-by: Peter Enderborg <peter.enderborg@...y.com>
> ---
>   include/trace/events/avc.h | 11 +++++++++--
>   security/selinux/avc.c     | 36 ++++++++++++++++++++++++++++++++++++
>   2 files changed, 45 insertions(+), 2 deletions(-)
>
> diff --git a/security/selinux/avc.c b/security/selinux/avc.c
> index 7de5cc5169af..d585b68c2a50 100644
> --- a/security/selinux/avc.c
> +++ b/security/selinux/avc.c
> @@ -695,6 +695,7 @@ static void avc_audit_pre_callback(struct audit_buffer *ab, void *a)
>   	audit_log_format(ab, " } for ");
>   }
>   
> +
>   /**
>    * avc_audit_post_callback - SELinux specific information
>    * will be called by generic audit code

Also, drop the spurious whitespace change above.