linux-kernel - Re: [PATCH v5 2/5] seccomp: make get_nth_filter available outside of CHECKPOINT_RESTORE

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Date:   Wed, 29 Aug 2018 21:07:59 +0200
From:   Christian Brauner <christian@...uner.io>
To:     Tycho Andersen <tycho@...ho.ws>
Cc:     Kees Cook <keescook@...omium.org>, linux-api@...r.kernel.org,
        containers@...ts.linux-foundation.org,
        Akihiro Suda <suda.akihiro@....ntt.co.jp>,
        Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Andy Lutomirski <luto@...capital.net>,
        Serge Hallyn <serge@...lyn.com>, Jann Horn <jannh@...gle.com>
Subject: Re: [PATCH v5 2/5] seccomp: make get_nth_filter available outside of
 CHECKPOINT_RESTORE

On Tue, Aug 28, 2018 at 08:36:00AM -0600, Tycho Andersen wrote:
> In the next commit we'll use this same mnemonic to get a listener for the
> nth filter, so we need it available outside of CHECKPOINT_RESTORE in the
> USER_NOTIFICATION case as well.
> 
> v2: new in v2
> v3: no changes
> v4: no changes
> v5: switch to CHECKPOINT_RESTORE || USER_NOTIFICATION to avoid warning when
>     only CONFIG_SECCOMP_FILTER is enabled.
> 
> Signed-off-by: Tycho Andersen <tycho@...ho.ws>
> CC: Kees Cook <keescook@...omium.org>
> CC: Andy Lutomirski <luto@...capital.net>
> CC: Oleg Nesterov <oleg@...hat.com>
> CC: Eric W. Biederman <ebiederm@...ssion.com>
> CC: "Serge E. Hallyn" <serge@...lyn.com>
> CC: Christian Brauner <christian.brauner@...ntu.com>
> CC: Tyler Hicks <tyhicks@...onical.com>
> CC: Akihiro Suda <suda.akihiro@....ntt.co.jp>
> ---
>  kernel/seccomp.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)

(Putting Serge and Jann in Cc. They seem to have been left out on
accident. :))

Acked-by: Christian Brauner <christian@...uner.io>

> 
> diff --git a/kernel/seccomp.c b/kernel/seccomp.c
> index a09eb5c05f68..ed786655186d 100644
> --- a/kernel/seccomp.c
> +++ b/kernel/seccomp.c
> @@ -1188,7 +1188,8 @@ long prctl_set_seccomp(unsigned long seccomp_mode, char __user *filter)
>  	return do_seccomp(op, 0, uargs);
>  }
>  
> -#if defined(CONFIG_SECCOMP_FILTER) && defined(CONFIG_CHECKPOINT_RESTORE)
> +#if defined(CONFIG_CHECKPOINT_RESTORE) || \
> +	defined(CONFIG_SECCOMP_USER_NOTIFICATION)
>  static struct seccomp_filter *get_nth_filter(struct task_struct *task,
>  					     unsigned long filter_off)
>  {
> @@ -1235,6 +1236,7 @@ static struct seccomp_filter *get_nth_filter(struct task_struct *task,
>  	return filter;
>  }
>  
> +#if defined(CONFIG_CHECKPOINT_RESTORE)
>  long seccomp_get_filter(struct task_struct *task, unsigned long filter_off,
>  			void __user *data)
>  {
> @@ -1307,7 +1309,8 @@ long seccomp_get_metadata(struct task_struct *task,
>  	__put_seccomp_filter(filter);
>  	return ret;
>  }
> -#endif
> +#endif /* CONFIG_CHECKPOINT_RESTORE */
> +#endif /* CONFIG_SECCOMP_FILTER */
>  
>  #ifdef CONFIG_SYSCTL
>  
> -- 
> 2.17.1
> 
> _______________________________________________
> Containers mailing list
> Containers@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/containers

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