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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Tue, 26 Nov 2019 09:51:41 +0100
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Subject: [PATCH] grub.d: Fix boot_indeterminate getting set on boot_success=0
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boot
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The "grub.d: Split out boot success reset from menu auto hide script"
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not only moved the code to clear boot_success and boot_indeterminate
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but for some reason also mixed in some broken changes to the
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boot_indeterminate handling.
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The boot_indeterminate var is meant to suppress the boot menu after
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a reboot from either a selinux-relabel or offline-updates. These
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2 special boot scenarios do not set boot_success since there is no
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successfull interaction with the user. Instead they increment
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boot_indeterminate, and if it is 1 and only when it is 1, so the
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first reboot after a "special" boot we suppress the menu.
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To ensure that we do show the menu if we somehow get stuck in a
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"special" boot loop where we do special-boots without them
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incrementing boot_indeterminate, the code before the
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"grub.d: Split out boot success reset from menu auto hide script"
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commit would increment boot_indeterminate once when it is 1, so that
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even if the "special" boot reboot-loop immediately we would show the
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menu on the next boot.
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That commit broke this however, because it not only moves the code,
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it also changes it from only "incrementing" boot_indeterminate once to
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always incrementing it, except when boot_success == 1 (and we reset it).
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This broken behavior causes the following problem:
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1. Boot a broken kernel, system hangs, power-cycle
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2. boot_success now != 1, so we increment boot_indeterminate from 0
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(unset!) to 1. User either simply tries again, or makes some changes
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but the end-result still is a system hang, power-cycle
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3. Now boot_indeterminate==1 so we do not show the menu even though the
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previous boot failed -> BAD
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This commit fixes this by restoring the behavior of setting
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boot_indeterminate to 2 when it was 1 before.
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Fixes: "grub.d: Split out boot success reset from menu auto hide script"
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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util/grub.d/10_reset_boot_success.in | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/util/grub.d/10_reset_boot_success.in b/util/grub.d/10_reset_boot_success.in
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index 6c88d933dde..737e1ae5b68 100644
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--- a/util/grub.d/10_reset_boot_success.in
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+++ b/util/grub.d/10_reset_boot_success.in
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@@ -6,18 +6,18 @@
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#
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# The boot_success var needs to be set to 1 from userspace to mark a boot successful.
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cat << EOF
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-insmod increment
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# Hiding the menu is ok if last boot was ok or if this is a first boot attempt to boot the entry
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if [ "\${boot_success}" = "1" -o "\${boot_indeterminate}" = "1" ]; then
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set menu_hide_ok=1
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else
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set menu_hide_ok=0
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fi
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-# Reset boot_indeterminate after a successful boot, increment otherwise
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+# Reset boot_indeterminate after a successful boot
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if [ "\${boot_success}" = "1" ] ; then
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set boot_indeterminate=0
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-else
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- increment boot_indeterminate
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+# Avoid boot_indeterminate causing the menu to be hidden more then once
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+elif [ "\${boot_indeterminate}" = "1" ]; then
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+ set boot_indeterminate=2
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fi
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# Reset boot_success for current boot
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set boot_success=0
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