linux-kernel - Re: [PATCH v2 6/7] audit: Use task_is_in_init_pid

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Date:   Tue, 14 Dec 2021 17:35:11 -0500
From:   Paul Moore <paul@...l-moore.com>
To:     Leo Yan <leo.yan@...aro.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Leon Romanovsky <leon@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jan Harkes <jaharkes@...cmu.edu>, coda@...cmu.edu,
        Eric Paris <eparis@...hat.com>,
        Balbir Singh <bsingharora@...il.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, coresight@...ts.linaro.org,
        linux-arm-kernel@...ts.infradead.org, codalist@...a.cs.cmu.edu,
        linux-audit@...hat.com
Subject: Re: [PATCH v2 6/7] audit: Use task_is_in_init_pid_ns()

On Wed, Dec 8, 2021 at 3:33 AM Leo Yan <leo.yan@...aro.org> wrote:
>
> Replace open code with task_is_in_init_pid_ns() for checking root PID
> namespace.
>
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  kernel/audit.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

I'm not sure how necessary this is, but it looks correct to me.

Acked-by: Paul Moore <paul@...l-moore.com>

> diff --git a/kernel/audit.c b/kernel/audit.c
> index 121d37e700a6..56ea91014180 100644
> --- a/kernel/audit.c
> +++ b/kernel/audit.c
> @@ -1034,7 +1034,7 @@ static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type)
>         case AUDIT_MAKE_EQUIV:
>                 /* Only support auditd and auditctl in initial pid namespace
>                  * for now. */
> -               if (task_active_pid_ns(current) != &init_pid_ns)
> +               if (!task_is_in_init_pid_ns(current))
>                         return -EPERM;
>
>                 if (!netlink_capable(skb, CAP_AUDIT_CONTROL))
> --
> 2.25.1

-- 
paul moore
www.paul-moore.com