On 4/6/07, Srivatsa Vaddagiri <[EMAIL PROTECTED]> wrote:
On Fri, Apr 06, 2007 at 04:32:24PM -0700, [EMAIL PROTECTED] wrote:
> +static int attach_task(struct container *cont, struct task_struct *tsk)
> {
[snip]
> + task_lock(tsk);
You need to check here if task state is PF_EXITING and fail with
-ESRCH if so? Otherwise we risk breaking refcount on
init_container_group.
Yes, I think you're right; I've now changed it to this in my tree:
task_lock(tsk);
if (tsk->flags & PF_EXITING) {
task_unlock(tsk);
put_container_group(newcg);
return -ESRCH;
}
rcu_assign_pointer(tsk->containers, newcg);
task_unlock(tsk);
Thanks,
Paul
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