Re: [PATCH AUTOSEL 6.6 048/139] proc: add config & param to block forcing mem writes

Adrian Ratiu
2024-09-26T11:09:28Z

On Wed, 25 Sep 2024, Alexey Dobriyan <adobriyan@gmail.com> wrote:
> On Wed, Sep 25, 2024 at 08:07:48AM -0400, Sasha Levin wrote:
>> From: Adrian Ratiu <adrian.ratiu@collabora.com> [ Upstream
>> commit 41e8149c8892ed1962bd15350b3c3e6e90cba7f4 ] This adds a
>> Kconfig option and boot param to allow removing the FOLL_FORCE
>> flag from /proc/pid/mem write calls because it can be abused.
>
> And this is not a mount option why?

Hello and thanks for asking!

The only reason is nobody asked for it yet. :)

We need to be careful how we do this, so the restriction is still
enabled when remounting, otherwise I don't see any impediment,
provided we can find a way to make it clean and safe.

I am travelling these weeks (All Systems GO conf) and have a lot
going on, so please feel free to send a patch and I'll review it
ASAP, otherwise I'll try to come up with something by end of
October.

Adrian