# Re: \[PATCH v19 6/8\] PM: hibernate: disable when there are active secretmem users

- From: David Hildenbrand \<hidden\>
- Date: 2021-05-18 10:27:21 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/05/206162
- Thread: https://ratatoskr.run/linux-api/2021/05/205953/t.md

```text
On 18.05.21 12:24, Mark Rutland wrote:
> On Thu, May 13, 2021 at 09:47:32PM +0300, Mike Rapoport wrote:
>> From: Mike Rapoport <redacted>
>>
>> It is unsafe to allow saving of secretmem areas to the hibernation
>> snapshot as they would be visible after the resume and this essentially
>> will defeat the purpose of secret memory mappings.
>>
>> Prevent hibernation whenever there are active secret memory users.
>
> Have we thought about how this is going to work in practice, e.g. on
> mobile systems? It seems to me that there are a variety of common
> applications which might want to use this which people don't expect to
> inhibit hibernate (e.g. authentication agents, web browsers).
>
> Are we happy to say that any userspace application can incidentally
> inhibit hibernate?

It's worth noting that secretmem has to be explicitly enabled by the admin to even work.

-- 
Thanks,

David / dhildenb

```