linux-kernel - Re: [PATCH] regmap: Add debugfs file for forcing field writes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 13 Jun 2023 12:24:28 +0200
From:   Waqar Hameed <waqar.hameed@...s.com>
To:     Mark Brown <broonie@...nel.org>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...s.com>
Subject: Re: [PATCH] regmap: Add debugfs file for forcing field writes

On Mon, Jun 12, 2023 at 16:00 +0100 Mark Brown <broonie@...nel.org> wrote:

> If we're going to do something like this which could interfere with
> driver operation then it should be guarded like the write support is so
> that people using it have to modify the kernel to get the feature, or at
> the very least taint the kernel.  This is less invasive but still might
> cause issues if someone is relying on read/modify/write behaviour.

I understand your point. Should we introduce a new macro like
`REGMAP_ALLOW_WRITE_DEBUGFS` (which requires direct code modification to
enable it) to guard this or introduce a new kernel configuration?