[PATCH v5 2/6] pid: use checkpoint_restore_ns_capable() for set_tid

[Christian Brauner]

On Wed, Jul 15, 2020 at 04:49:50PM +0200, Adrian Reber wrote:
> Use the newly introduced capability CAP_CHECKPOINT_RESTORE to allow
> using clone3() with set_tid set.
> 
> Signed-off-by: Adrian Reber <areber at redhat.com>
> Signed-off-by: Nicolas Viennot <Nicolas.Viennot at twosigma.com>
> ---

Looks good!
Acked-by: Christian Brauner <christian.brauner at ubuntu.com>

>  kernel/pid.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/pid.c b/kernel/pid.c
> index de9d29c41d77..a9cbab0194d9 100644
> --- a/kernel/pid.c
> +++ b/kernel/pid.c
> @@ -199,7 +199,7 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *set_tid,
>  			if (tid != 1 && !tmp->child_reaper)
>  				goto out_free;
>  			retval = -EPERM;
> -			if (!ns_capable(tmp->user_ns, CAP_SYS_ADMIN))
> +			if (!checkpoint_restore_ns_capable(tmp->user_ns))
>  				goto out_free;
>  			set_tid_size--;
>  		}
> -- 
> 2.26.2
>