netdev - Re: [PATCH v7] efi: Do not import certificates from UEFI Secure Boot for T2 Macs

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]

Message-ID: <06062b288d675dc060f33041e9b2009c151698e6.camel@linux.ibm.com>
Date:   Fri, 13 May 2022 11:24:45 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Aditya Garg <gargaditya08@...e.com>,
        "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>
Cc:     "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 v7] efi: Do not import certificates from UEFI Secure
 Boot for T2 Macs

Hi Aditya,

On Fri, 2022-04-15 at 17:02 +0000, Aditya Garg wrote:
> From: Aditya Garg <gargaditya08@...e.com>
> 
> On Apple T2 Macs, when Linux attempts to read the db and dbx efi variables
> at early boot to load UEFI Secure Boot certificates, a page fault occurs
> in Apple firmware code and EFI runtime services are disabled with the
> following logs:

Are there directions for installing Linux on a Mac with Apple firmware
code?  Are you dual booting Linux and Mac, or just Linux?  While in
secure boot mode, without being able to read the keys to verify the
kernel image signature, the signature verification should fail.

Has anyone else tested this patch?

thanks,

Mimi