linux-kernel - Re: [PATCH v2 06/10] PM: hibernate: Add kernel-based encryption

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Message-ID: <202209201608.507B5468@keescook>
Date:   Tue, 20 Sep 2022 16:09:57 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Evan Green <evgreen@...omium.org>
Cc:     linux-kernel@...r.kernel.org, gwendal@...omium.org,
        Eric Biggers <ebiggers@...nel.org>,
        Matthew Garrett <mgarrett@...ora.tech>, jarkko@...nel.org,
        zohar@...ux.ibm.com, linux-integrity@...r.kernel.org,
        Pavel Machek <pavel@....cz>, apronin@...omium.org,
        dlunev@...gle.com, rjw@...ysocki.net, linux-pm@...r.kernel.org,
        corbet@....net, jejb@...ux.ibm.com,
        Len Brown <len.brown@...el.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH v2 06/10] PM: hibernate: Add kernel-based encryption

On Tue, Aug 23, 2022 at 03:25:22PM -0700, Evan Green wrote:
> Enabling the kernel to be able to do encryption and integrity checks on
> the hibernate image prevents a malicious userspace from escalating to
> kernel execution via hibernation resume. As a first step toward this, add
> the scaffolding needed for the kernel to do AEAD encryption on the
> hibernate image, giving us both secrecy and integrity.

I'd love Eric to take a look at this, just to make sure the crypto API
is being used correctly here. :)

-- 
Kees Cook