[PATCH v7 2/6] seccomp: make get_nth_filter available outside of CHECKPOINT_RESTORE

[Christian Brauner]

On Thu, Sep 27, 2018 at 09:11:15AM -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.
> v7: drop USER_NOTIFICATION bits
> 
> Signed-off-by: Tycho Andersen <tycho at tycho.ws>
> CC: Kees Cook <keescook at chromium.org>
> CC: Andy Lutomirski <luto at amacapital.net>
> CC: Oleg Nesterov <oleg at redhat.com>
> CC: Eric W. Biederman <ebiederm at xmission.com>
> CC: "Serge E. Hallyn" <serge at hallyn.com>
> CC: Christian Brauner <christian.brauner at ubuntu.com>
> CC: Tyler Hicks <tyhicks at canonical.com>
> CC: Akihiro Suda <suda.akihiro at lab.ntt.co.jp>

Acked-by: Christian Brauner <christian at brauner.io>

> ---
>  kernel/seccomp.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/seccomp.c b/kernel/seccomp.c
> index fa6fe9756c80..44a31ac8373a 100644
> --- a/kernel/seccomp.c
> +++ b/kernel/seccomp.c
> @@ -1158,7 +1158,7 @@ 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_SECCOMP_FILTER)
>  static struct seccomp_filter *get_nth_filter(struct task_struct *task,
>  					     unsigned long filter_off)
>  {
> @@ -1205,6 +1205,7 @@ 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)
>  {
> @@ -1277,7 +1278,8 @@ 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
> 
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