linux-kernel - Re: [PATCH v4 RESEND] efi: Do not import certificates from UEFI Secure Boot for T2 Macs

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Message-ID: <A997BDE1-BA52-4974-BF6F-EF086ED7779E@live.com>
Date:   Wed, 13 Apr 2022 14:03:22 +0000
From:   Aditya Garg <gargaditya08@...e.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>
CC:     "jarkko@...nel.org" <jarkko@...nel.org>,
        "dmitry.kasatkin@...il.com" <dmitry.kasatkin@...il.com>,
        "jmorris@...ei.org" <jmorris@...ei.org>,
        "serge@...lyn.com" <serge@...lyn.com>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "andrii@...nel.org" <andrii@...nel.org>,
        "kafai@...com" <kafai@...com>,
        "songliubraving@...com" <songliubraving@...com>,
        "yhs@...com" <yhs@...com>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kpsingh@...nel.org" <kpsingh@...nel.org>,
        "linux-integrity@...r.kernel.org" <linux-integrity@...r.kernel.org>,
        "keyrings@...r.kernel.org" <keyrings@...r.kernel.org>,
        "linux-security-module@...r.kernel.org" 
        <linux-security-module@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        Orlando Chamberlain <redecorating@...tonmail.com>,
        "admin@...eit.net" <admin@...eit.net>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH v4 RESEND] efi: Do not import certificates from UEFI
 Secure Boot for T2 Macs

> 
> Both the comment here and the patch description above still needs to be
> improved. Perhaps something along these lines.
Checkout v5
> 
> Secure boot on Apple Macs with a T2 Security chip cannot read either
> the EFI variables or the certificates stored in different db's (e.g.
> db, dbx, MokListXRT). Attempting to read them causes ... 
> 
> Avoid reading the EFI variables or the certificates stored in different
> dbs. As a result, without certificates secure boot signature
> verification fails.
> 
> thanks,
> 
> Mimi
> 
>