linux-kernel - Re: [PATCH v2] io_uring,audit: don't log IORING_OP

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Date:   Wed, 1 Feb 2023 16:18:46 -0500
From:   Paul Moore <paul@...l-moore.com>
To:     Richard Guy Briggs <rgb@...hat.com>
Cc:     Linux-Audit Mailing List <linux-audit@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, io-uring@...r.kernel.org,
        Eric Paris <eparis@...isplace.org>,
        Steve Grubb <sgrubb@...hat.com>,
        Christian Brauner <brauner@...nel.org>,
        Stefan Roesch <shr@...com>
Subject: Re: [PATCH v2] io_uring,audit: don't log IORING_OP_MADVISE

On Wed, Feb 1, 2023 at 3:34 PM Richard Guy Briggs <rgb@...hat.com> wrote:
>
> fadvise and madvise both provide hints for caching or access pattern for
> file and memory respectively.  Skip them.

You forgot to update the first sentence in the commit description :/

I'm still looking for some type of statement that you've done some
homework on the IORING_OP_MADVISE case to ensure that it doesn't end
up calling into the LSM, see my previous emails on this.  I need more
than "Steve told me to do this".

I basically just want to see that some care and thought has gone into
this patch to verify it is correct and good.

> Fixes: 5bd2182d58e9 ("audit,io_uring,io-wq: add some basic audit support to io_uring")
> Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
> ---
> changelog
> v2:
> - drop *GETXATTR patch
> - drop FADVISE hunk
>
>  io_uring/opdef.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/io_uring/opdef.c b/io_uring/opdef.c
> index 3aa0d65c50e3..d3f36c633ceb 100644
> --- a/io_uring/opdef.c
> +++ b/io_uring/opdef.c
> @@ -312,6 +312,7 @@ const struct io_op_def io_op_defs[] = {
>                 .issue                  = io_fadvise,
>         },
>         [IORING_OP_MADVISE] = {
> +               .audit_skip             = 1,
>                 .name                   = "MADVISE",
>                 .prep                   = io_madvise_prep,
>                 .issue                  = io_madvise,
> --
> 2.27.0

-- 
paul-moore.com