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From:   Matthew Garrett <mjg59@google.com>
Date:   Fri, 8 Mar 2019 12:22:46 -0800
Message-ID: <CACdnJuso1o=fib+fUuY_f2ibJKD5N=kr_BrAtgu_srHCcRLKig@mail.gmail.com>
Subject: Re: [PATCH 3/3] x86/ima: retry detecting secure boot mode
To:     Mimi Zohar <zohar@linux.ibm.com>
Cc:     Justin Forbes <jforbes@redhat.com>,
        linux-integrity <linux-integrity@vger.kernel.org>,
        LSM List <linux-security-module@vger.kernel.org>,
        linux-efi <linux-efi@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        David Howells <dhowells@redhat.com>,
        Seth Forshee <seth.forshee@canonical.com>,
        kexec@lists.infradead.org, Nayna Jain <nayna@linux.ibm.com>
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On Fri, Mar 8, 2019 at 10:43 AM Mimi Zohar <zohar@linux.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=E2=80=A6