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

Oleg Nesterov
2021-03-15T13:20:15Z

On 03/15, Cyrill Gorcunov wrote:
>
> On Mon, Mar 15, 2021 at 01:08:03PM +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.

Oleg.