Re: [PATCH] prctl: fix PR_SET_MM_AUXV kernel stack leak

Cyrill Gorcunov
2021-03-15T13:53:36Z

On Mon, Mar 15, 2021 at 02:19:12PM +0100, Oleg Nesterov wrote:
> > >
> > > And why task_lock(current) ? What does it try to protect?
> >
> > As far as I remember this was related to reading from procfs
> > at time the patch was written for first time. Looks like this
> > not relevant anymore and could be dropped.
>
> I think this was never relevant, ->alloc_lock is per-thread, not per mm.

Then we can safely drop it. I'll take one more look once time permit
and prepare a patch.