[Bug 1868138] Re: 18.04LTS upgrade of grub-common:amd64 FAILs in post-install; incorrectly REWRITES user's /etc/default/grub
Dimitri John Ledkov
launchpad at surgut.co.uk
Fri Mar 20 15:07:13 UTC 2020
/etc/default/grub is ucf/debconf managed conffile, which has always been
processed by grub2 maintainer scripts, and there was no change in
behaviour of that in bionic.
You may not have ever noticed this before, because you might have only
applied the config change without re-running dpkg-reconfigure on the
relevant grub2 package, nor apply any updates that might be available.
Note that on all new installations / launches of new instances, all
updates are applied during installation process where possible. Thus
this is not a regression in updates.
Many of the options specified there are not used by Ubuntu initramfs-
tools and have no effect, why are you specifying dracut options? Have
you converted your system from initramfs-tools to dracut?
Did you experience that the syntax used in the conffig file ever worked
across grub2 upgrades or dpkg-reconfigure in any Ubuntu or Debian
release?
Note, that you can always use dpkg preseed of the debconf key with all
of the extra commandline options which will persist across grub2
updates; or use the .d drop in files (although those too, get parsed).
** Tags removed: regression-update
** Changed in: grub2 (Ubuntu)
Status: Triaged => Incomplete
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https://bugs.launchpad.net/bugs/1868138
Title:
18.04LTS upgrade of grub-common:amd64 FAILs in post-install;
incorrectly REWRITES user's /etc/default/grub
Status in grub2 package in Ubuntu:
Incomplete
Bug description:
upgrading packages, as usual, on a long-time-in-production Ubuntu
1804LTS server instance,
lsb_release -rd
Description: Ubuntu 18.04.4 LTS
Release: 18.04
uname -rm
5.3.0-40-generic x86_64
today's update included grub,
cat /var/log/apt/history.log
Start-Date: 2020-03-19 08:58:38
Commandline: apt-get upgrade
Upgrade: grub-common:amd64 (2.02-2ubuntu8.14, 2.02-2ubuntu8.15), grub2-common:amd64 (2.02-2ubuntu8.14, 2.02-2ubuntu8.15), grub-pc:amd64 (2.02-2ubuntu8.14, 2.02-2ubuntu8.15), grub-pc-bin:amd64 (2.02-2ubuntu8.14, 2.02-2ubuntu8.15)
Error: Sub-process /usr/bin/dpkg returned an error code (1)
End-Date: 2020-03-19 09:01:52
the update FAILs in grub post-processing
apparently, the install is -- new behavior -- REWRITING, incorrectly,
the 'GRUB_CMDLINE_LINUX=' stanza in /etc/default/grub -- my _local_
end-user config
before
cat /etc/default/grub
...
GRUB_CMDLINE_LINUX_DEFAULT=""
53 GRUB_CMDLINE_LINUX="rd.shell rd.udev.log_priority=info rd.auto=1 \
dolvm lvmwait=/dev/mapper/VG0_ROOT \
rootfstype=ext4 rootdelay=90 rootflags=journal_checksum \
noresume pcie_aspm=off max_loop=256 transparent_hugepage=never clocksource=tsc clocksource_failover=tsc tsc=reliable force_tsc_stable=1 \
scsi_mod.use_blk_mq=1 \
net.ifnames=1 biosdevname=0 \
showopts noquiet \
log_buf_len=16M print_fatal_signals=1 systemd.log_level=info systemd.log_target=kmsg earlyprintk=vga,keep \
mitigations=auto spec_store_bypass_disable=on \
"
...
exec an update, as usual
apt-get update && apt-get upgrade
Hit:1 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:4 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n]
-> Y
Do you want to continue? [Y/n] Y
now, fails
Setting up grub-pc (2.02-2ubuntu8.15) ...
Sourcing file `/etc/default/grub'
/etc/default/grub: line 53: unexpected EOF while looking for matching `"'
dpkg: error processing package grub-pc (--configure):
installed grub-pc package post-installation script subprocess returned error exit status 2
Errors were encountered while processing:
grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)
it's incorrectly re-written /etc/default/grub
cat /etc/default/grub
...
GRUB_CMDLINE_LINUX_DEFAULT=""
53 GRUB_CMDLINE_LINUX="rd.shell rd.udev.log_priority=info rd.auto=1 dolvm lvmwait=/dev/mapper/VG0_ROOT rootfstype=ext4 rootdelay=90 rootflags=journal_checksum noresume pcie_aspm=off max_loop=256 transparent_hugepage=never clocksource=tsc clocksource_failover=tsc tsc=reliable force_tsc_stable=1 scsi_mod.use_blk_mq=1 net.ifnames=1 biosdevname=0 showopts noquiet log_buf_len=16M print_fatal_signals=1 systemd.log_level=info systemd.log_target=kmsg earlyprintk=vga,keep mitigations=auto spec_store_bypass_disable=on"
dolvm lvmwait=/dev/mapper/VG0_ROOT \
rootfstype=ext4 rootdelay=90 rootflags=journal_checksum \
noresume pcie_aspm=off max_loop=256 transparent_hugepage=never clocksource=tsc clocksource_failover=tsc tsc=reliable force_tsc_stable=1 \
scsi_mod.use_blk_mq=1 \
net.ifnames=1 biosdevname=0 \
showopts noquiet \
log_buf_len=16M print_fatal_signals=1 systemd.log_level=info systemd.log_target=kmsg earlyprintk=vga,keep \
mitigations=auto spec_store_bypass_disable=on \
"
prepending the EXISTING 'GRUB_CMDLINE_LINUX=' with a duplicate of
itself ... plus an errant trailing `"'
fyi,
apt-cache policy grub2
grub2:
Installed: (none)
Candidate: 2.02-2ubuntu8.15
Version table:
2.02-2ubuntu8.15 500
500 http://us.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
2.02-2ubuntu8 500
500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
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