Re: [Patch 4/21] Make fill_psinfo generic

[Suzuki K. Poulose]

On Tue, 14 Dec 2010 07:55:00 -0800
Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Tue, Dec 14, 2010 at 2:01 AM, Suzuki K. Poulose <suzuki@xxxxxxxxxx> wrote:
> > +       /*
> > +        * If we are dumping core for "another task"
> > +        * we can't use copy_from_user().
> > +        */
> > +       if (p->group_leader == current->group_leader) {
> 
> This is totally bogus. "group_leader" has absolutely nothing to do
> with whether the process shares the address space. It's about signal
> sharing etc.
> 
> The way to check whether they share the same address space is to check
> whether "mm" is the same.
> 

OK. I will make use of the mm here.

Thanks
Suzuki


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