Re: + procfs-mark-thread-stack-correctly-in-proc-pid-maps.patch added to -mm tree

[Oleg Nesterov <oleg@redhat.com>]

On 02/28, Siddhesh Poyarekar wrote:
>
> On Tue, Feb 28, 2012 at 10:34 PM, Oleg Nesterov <oleg@redhat.com> wrote:
> >> +int vm_is_stack(struct task_struct *task,
> >> +                           struct vm_area_struct *vma, int in_group)
> >> +{
> >> +     if (vm_is_stack_for_task(task, vma))
> >> +             return 1;
> >> +
> >> +     if (in_group) {
> >> +             struct task_struct *t = task;
> >> +             while_each_thread(task, t) {
> >> +                     if (vm_is_stack_for_task(t, vma))
> >> +                             return 1;
> >> +             }
> >> +     }
> >> +
> >> +     return 0;
> >> +}
> >
> > This is obviously wrong, while_each_thread() is not safe without
> > tasklist or siglock or rcu.
>
> I have fixed this in my git stash. I'll submit

OK, please CC me ;)

Oleg.