grub2/0215-10_linux.in-restore-existence-check-in-get_sorted_bl.patch
Javier Martinez Canillas 4cf8c08cf7
Enable tpm module and make system to boot even if TPM measurements fail
Since GRUB 2.04 there is support for TPM measurements in a tpm module that
uses the verifiers framework. So this is used now instead of the previous
downstream patches that we were carrying.

But we forgot to enable this module when rebasing to 2.04 which leads to
GRUB no longer measuring the kernel, initrd and command line parameters.

One side effect of using the verifiers framework is that if measurements
fail, GRUB won't be able to open the files since the errors from the tpm
module are propagated. This means that a firmware with a buggy tpm support
will prevent the machine to boot, which was not the case with the previous
downstream patches. Don't propagate the measurement errors to prevent this.

Resolves: rhbz#1836433

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
2020-05-18 10:19:45 +02:00

32 lines
1.1 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Adam Williamson <awilliam@redhat.com>
Date: Thu, 14 May 2020 17:52:53 -0700
Subject: [PATCH] 10_linux.in: restore existence check in `get_sorted_bls`
This is necessary to handle `/boot/loader/entries` not existing
at all (or possibly existing but being empty - not sure about
that case). Without this check, this function gets pretty wacky
and winds up returning the contents of the current working
directory, which of course causes whatever called it to break.
Resolves: rhbz#1836020
Signed-off-by: Adam Williamson <awilliam@redhat.com>
---
util/grub.d/10_linux.in | 3 +++
1 file changed, 3 insertions(+)
diff --git a/util/grub.d/10_linux.in b/util/grub.d/10_linux.in
index 80299ecaf00..519e2d9e616 100644
--- a/util/grub.d/10_linux.in
+++ b/util/grub.d/10_linux.in
@@ -141,6 +141,9 @@ get_sorted_bls()
local IFS=$'\n'
files=($(for bls in ${blsdir}/*.conf; do
+ if ! [[ -e "${bls}" ]] ; then
+ continue
+ fi
bls="${bls%.conf}"
bls="${bls##*/}"
echo "${bls}"