linux-kernel - Re: [PATCH 5/8] efi: Get the secure boot status [ver #6]

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Message-ID: <6306.1485209503@warthog.procyon.org.uk>
Date:   Mon, 23 Jan 2017 22:11:43 +0000
From:   David Howells <dhowells@...hat.com>
To:     Matt Fleming <matt@...eblueprint.co.uk>
Cc:     dhowells@...hat.com, ard.biesheuvel@...aro.org,
        linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org, keyrings@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        "H. Peter Anvin" <hpa@...or.com>, Peter Jones <pjones@...hat.com>
Subject: Re: [PATCH 5/8] efi: Get the secure boot status [ver #6]

Matt Fleming <matt@...eblueprint.co.uk> wrote:

> >  (4) extract_kernel() calls sanitize_boot_params() which would otherwise clear
> >      the secure-boot flag.
>  
> The ->sentinel flag should be clear (because you zero'd boot_params on
> alloc), so the code inside of sanitize_boot_params() should never
> trigger for the secure boot case.

But it *does* trigger, otherwise I wouldn't've noticed this.

David