linux-kernel - Re: [PATCH v2 2/6] driver core: Add common support to skip probe for un-authorized devices

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Message-ID: <77aae23f-8c07-845b-90d7-389e1cd1ef5d@linux.intel.com>
Date:   Thu, 30 Sep 2021 14:12:52 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Jonathan Corbet <corbet@....net>,
        Jason Wang <jasowang@...hat.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-usb@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        "Reshetova, Elena" <elena.reshetova@...el.com>
Subject: Re: [PATCH v2 2/6] driver core: Add common support to skip probe for
 un-authorized devices


> If all you want to do is prevent someone from loading a bunch of
> drivers that you have identified as unhardened, why not just use a
> modprobe blacklist?

That wouldn't help for builtin drivers, we cannot control initcalls.

This LWN article has more details on the background.

https://lwn.net/Articles/865918/

-Andi


> Am I missing something?
>
> Alan Stern