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SubjectRe: [PATCH 3/3] pids: Make it possible to clone tasks with given pids
My previous objection was wrong, I should try to find something else ;)

On 11/17, Pavel Emelyanov wrote:
>
> +static int set_pidmap(struct pid_namespace *pid_ns, int pid)
> +{
> + int offset;
> + struct pidmap *map;
> +
> + /*
> + * When creating a new pid namespace we must make its init
> + * have pid == 1 in it.
> + */
> + if (pid_ns->child_reaper == NULL)
> + return 0;
> +
> + /*
> + * Don't allow to create a task with a pid which has recently
> + * belonged to some other (dead already) task. Only init (of
> + * a freshly created namespace) and his clones can do this.
> + */
> + if (pid_ns->last_pid != 1)
> + return -EPERM;
> +
> + map = &pid_ns->pidmap[pid/BITS_PER_PAGE];

probably we should check that map < PIDMAP_ENTRIES ?

Oleg.



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