linux-kernel - Re: [PATCH 3/3] x86/ima: retry detecting secure boot mode

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: <CACdnJuso1o=fib+fUuY_f2ibJKD5N=kr_BrAtgu_srHCcRLKig@mail.gmail.com>
Date:   Fri, 8 Mar 2019 12:22:46 -0800
From:   Matthew Garrett <mjg59@...gle.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>
Cc:     Justin Forbes <jforbes@...hat.com>,
        linux-integrity <linux-integrity@...r.kernel.org>,
        LSM List <linux-security-module@...r.kernel.org>,
        linux-efi <linux-efi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        David Howells <dhowells@...hat.com>,
        Seth Forshee <seth.forshee@...onical.com>,
        kexec@...ts.infradead.org, Nayna Jain <nayna@...ux.ibm.com>
Subject: Re: [PATCH 3/3] x86/ima: retry detecting secure boot mode

On Fri, Mar 8, 2019 at 10:43 AM Mimi Zohar <zohar@...ux.ibm.com> wrote:
> FYI, efi_printk() works before exit_boot(), but not afterwards.  The
> system hangs.

efi_printk() uses boot services to print, so that's not unexpected :)
It would probably be sensible to return an error rather than crash,
though…