Ubuntu
dpkg package

package snapd 2.23.1 failed to install/upgrade: trying to overwrite '/etc/apparmor.d/usr.lib.snapd.snap-confine', which is also in package snap-confine 2.23.1

Bug #1673247 reported by Luke L on 2017-03-15

This bug affects 15 people

	Status	Importance	Assigned to
snapd	Won't Fix	Undecided	Unassigned
dpkg (Ubuntu)	In Progress	Critical	Unassigned
Trusty	Confirmed	Undecided	Unassigned
Xenial	Confirmed	Undecided	Unassigned
Yakkety	Invalid	Undecided	Unassigned
Zesty	Confirmed	Undecided	Unassigned
snapd (Ubuntu)	In Progress	Critical	Michael Vogt
Trusty	In Progress	Undecided	Unassigned
Xenial	Confirmed	Undecided	Unassigned
Yakkety	Invalid	Undecided	Unassigned
Zesty	Confirmed	Undecided	Unassigned

Bug Description

When the ubuntu installer runs it has an option to download updates during the install. When this happens snapd/snap-confine 2.22.6 are installed on /target. The upgrade brings in snapd/snap-confine 2.23.1 which has a conffile in /etc/apparmor.d/usr.lib.snapd.snap-confine. The snapd packages declares a breaks/replaces: snapd-confine (<< 2.23) which works correctly on regular upgrades. However it does fail on upgrades with the "--root=/target" that is used by ubiquity. After a bit of debugging it turns out the reason is that
src/archives.c:tarobject() has a check for obsolete conffiles in the block
around "Is the file an obsolete conffile ...". There is a stat() here that
checks that the conff->name and the fnamevb are the same file. This check
fails to take the instdir into account and therefore the loop does not
continue but falls through to the "does_replace()" checks.

--------------------------------------------
Snap 2.23.1 fails to upgrade from 2.21.

Known facts:
- reporters (and apport) indicate it fails during the install via the live-cd
- not reproducible so far on an already installed system
- breaks/replaces of snapd are correct
- When adding "xenial-proposed" to apt-setup in ubiquity and installing

Cause:
- when ubiquity runs it uses "dpkg --root=/target --unpack ..." - however when doing the conffile checking dpkg does not handle the "--root" parameter correctly and checks something against "/" instead of "/target".

---------------------------------------------
I really don't know what else to add...

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: snapd 2.23.1
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CasperVersion: 1.376.2
Date: Wed Mar 15 16:03:33 2017
DuplicateSignature:
package:snapd:2.23.1
Unpacking snapd (2.23.1) over (2.21) ...
dpkg: error processing archive /target/var/cache/apt/archives/snapd_2.23.1_amd64.deb (--unpack):
trying to overwrite '/etc/apparmor.d/usr.lib.snapd.snap-confine', which is also in package snap-confine 2.23.1
ErrorMessage: trying to overwrite '/etc/apparmor.d/usr.lib.snapd.snap-confine', which is also in package snap-confine 2.23.1
LiveMediaBuild: Ubuntu-GNOME 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215)
RelatedPackageVersions:
dpkg 1.18.4ubuntu1.1
apt 1.2.19
SourcePackage: snapd
Title: package snapd 2.23.1 failed to install/upgrade: trying to overwrite '/etc/apparmor.d/usr.lib.snapd.snap-confine', which is also in package snap-confine 2.23.1
UpgradeStatus: No upgrade log present (probably fresh install)

See original description

Tags:

Revision history for this message

Luke L (lukedeux) wrote on 2017-03-15:

AptOrdering.txt Edit (978 bytes, text/plain; charset="utf-8")
Dependencies.txt Edit (2.9 KiB, text/plain; charset="utf-8")
Df.txt Edit (737 bytes, text/plain; charset="utf-8")
Dmesg.txt Edit (65.9 KiB, text/plain; charset="utf-8")
DpkgHistoryLog.txt Edit (88.9 KiB, text/plain; charset="utf-8")
DpkgTerminalLog.txt Edit (820 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (85.0 KiB, text/plain; charset="utf-8")

Apport retracing service (apport) on 2017-03-15

tags:

removed: need-duplicate-check

Revision history for this message

Launchpad Janitor (janitor) wrote on 2017-03-15:

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in snapd (Ubuntu):
status:	New → Confirmed

Revision history for this message

Barbarossa (dbarbarossa) wrote on 2017-03-15:

same problem

Revision history for this message

philwebman (philwebman) wrote on 2017-03-15:

Same problem here too.

Revision history for this message

Łukasz Karbownik (meaven) wrote on 2017-03-15:

Same here but encountered this error during Ubuntu 16.10 installation and it breaks installation process.

Revision history for this message

paride (fparide) wrote on 2017-03-15:

Same problem

Revision history for this message

mike (slicktrick) wrote on 2017-03-15:

I have had the same error with 16.04 16.10 and kbuntu 16.10 cannot complete fresh install.

Revision history for this message

Ilias (ikasou) wrote on 2017-03-15:

Same on 16.10 been driving me nuts - aren't those ISO's supposed to be frozen??

Revision history for this message

Stephen Balaban (launahpad) wrote on 2017-03-15:

Reporting the same problem across multiple computers, both 16.04 and 16.10. (OEM Install / Graphical Install / Try => Install)

Clearly a breaking change was introduced.

Revision history for this message

Thomas Steiger (7-tom-z) wrote on 2017-03-15:

#10

Same for me - breaks fresh install.

Revision history for this message

Sergey Melnichenko (sergey.m) wrote on 2017-03-15:

#11

Tried to installed Ubuntu 16.04.2 - same problem. Give us 16.04 - STABLE version!!!!

Revision history for this message

Stephen Balaban (launahpad) wrote on 2017-03-16:

#12

**Solution: Unplug your internet connection / disable wifi.**

Quick fix is to have no active connection during installation. Just unplug your ethernet cable.

Up vote this on stack overflow so people know about it.
http://askubuntu.com/a/893497/665927

Revision history for this message

mike (slicktrick) wrote on 2017-03-16:

#13

Post # 12 worked for me. disconnected the ethernet cable no wifi, and installed flawlessly.

Revision history for this message

mesiu84 (mesiu84) wrote on 2017-03-16:

#14

How am I supposed to disconnect web server that is online? It's a joke I guess

Revision history for this message

Stephen Balaban (launahpad) wrote on 2017-03-16:

#15

@#14, not a joke. Obviously that fix only works if you're physically next to your machine and not if you're sshing in.

Revision history for this message

Thomas Steiger (7-tom-z) wrote on 2017-03-16:

#16

When I did this there was a crash later with grub that asked me to upload a bug report. Does anyone know what that bug might be? I am betting that that symptom is being reported far more frequently than this actual cause issue.

Revision history for this message

Adam Conrad (adconrad) wrote on 2017-03-16:

#17

Removed snapd 2.23.1 from trusty/xenial/yakkety. Will copy 2.22.6 back in once the deleted go through.

Changed in snapd (Ubuntu):
assignee:	nobody → Michael Vogt (mvo)
importance:	Undecided → Critical

Revision history for this message

Adam Conrad (adconrad) wrote on 2017-03-16:

#18

For people already bitten by this, the workaround would be to remove snap-confine. snapd no longer depends on it.

Revision history for this message

Thomas Steiger (7-tom-z) wrote on 2017-03-16:

#19

Quick update as I have tested a number of install options on a Thinkpad 460s.

1 - Secure Boot, UEFI, no Wifi - install works and all good after apt-get update,upgrade
2 - No Secure Boot, UEFI, no Wifi - install works and all good after apt-get update, upgrade
3 - Same as 2, enabled Wifi, but no Update during install - Fails
This one was interesting as I assumed the issue was part of the upgrade at install scripts... not so.
4 - Legacy Bios - install USB will not even boot. Likely unrelated and an issue in setup.

Also the mentioned AskUbuntu question has been flagged as attracting low quality answers by some dumba$$ algorithm so cannot be update without 10 rep points. The unfortunate downside of automated SPAM.

Regardless a networkless install seems to be a work around for now, and upgrading after seems to work fine.

Revision history for this message

Seth Arnold (seth-arnold) wrote on 2017-03-16:

#20

Thomas, there's usually no need to keep adding answers to a stack exchange post once there's one correct answer on the post. Just upvote the correct one and it'll migrate to the top. More answers won't help anything.

Thanks

Michael Vogt (mvo) on 2017-03-16

description:

updated

Michael Vogt (mvo) on 2017-03-16

description:

updated

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-16:

#21

Proposed fix Edit (1.5 KiB, text/plain)

Michael Vogt (mvo) on 2017-03-16

description:	updated
description:	updated

Ubuntu Foundations Team Bug Bot (crichton) on 2017-03-16

tags:

added: patch

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-16:

#22

patch from upstream Edit (727 bytes, text/plain)

Revision history for this message

Barbarossa (dbarbarossa) wrote on 2017-03-16:

#23

worked for me. no wifi - installed without any problem.

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-17:

#24

Testcase for https://anonscm.debian.org/git/dpkg/dpkg-tests.git Edit (5.9 KiB, text/plain)

Changed in dpkg (Ubuntu):
status:	New → In Progress
importance:	Undecided → Critical
Changed in snapd (Ubuntu):
status:	Confirmed → Invalid
Changed in snapd (Ubuntu Trusty):
status:	New → Invalid
status:	Invalid → In Progress
Changed in snapd (Ubuntu):
status:	Invalid → In Progress

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-17:

#25

debdiff for yakkety Edit (1.4 KiB, text/plain)

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-17:

#26

debdiff for trusty Edit (2.8 KiB, text/plain)

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-17:

#27

debdiff for xenial Edit (1.4 KiB, text/plain)

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-17:

#28

debdiff for zesty Edit (1.4 KiB, text/plain)

Revision history for this message

Michael Vogt (mvo) wrote on 2017-03-17:

#29

Once dpkg is SRUed we will have to upload a new snapd with a versioned "Pre-Depends" on the new dpkg.

Revision history for this message

Seth Arnold (seth-arnold) wrote on 2017-03-17:

#30

mvo, will the installer be intelligent enough to install dpkg in a separate install run before all the other packages?

Thanks

Revision history for this message

Launchpad Janitor (janitor) wrote on 2017-03-20:

#31

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in dpkg (Ubuntu Trusty):
status:	New → Confirmed
Changed in dpkg (Ubuntu Xenial):
status:	New → Confirmed
Changed in dpkg (Ubuntu Yakkety):
status:	New → Confirmed
Changed in snapd (Ubuntu Xenial):
status:	New → Confirmed
Changed in snapd (Ubuntu Yakkety):
status:	New → Confirmed

Revision history for this message

Reinhardt Pflanz (sajaha-e) wrote on 2017-06-30:

#36

German Languages ?

Changed in dpkg (Ubuntu Xenial):
assignee:	nobody → Reinhardt Pflanz (sajaha-e)

Néstor O. Gozza (mangosta11) on 2017-07-05

Changed in dpkg (Ubuntu Trusty):
assignee:	nobody → Néstor O. Gozza (mangosta11)

Revision history for this message

Launchpad Janitor (janitor) wrote on 2017-07-08:

#37

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in dpkg (Ubuntu Zesty):
status:	New → Confirmed
Changed in snapd (Ubuntu Zesty):
status:	New → Confirmed

Revision history for this message

Bruce Millar (brmillar) wrote on 2018-02-06:

#39

Is there a fix for this problem?

dino99 (9d9) on 2018-02-06

Changed in dpkg (Ubuntu Trusty):
assignee:	Néstor O. Gozza (mangosta11) → nobody
Changed in dpkg (Ubuntu Xenial):
assignee:	Reinhardt Pflanz (sajaha-e) → nobody
Changed in dpkg (Ubuntu Yakkety):
status:	Confirmed → Invalid
Changed in snapd (Ubuntu Yakkety):
status:	Confirmed → Invalid

Revision history for this message

dino99 (9d9) wrote on 2018-02-06:

#40

@Bruce

follow #18 advice; that's easy.

Revision history for this message

Zygmunt Krynicki (zyga) wrote on 2019-10-29:

#41

Michael, are you still actively working on this issue?

Revision history for this message

Michael Vogt (mvo) wrote on 2019-10-30:

#42

I'm closing the snapd task, this is a bug in dpkg.

Changed in snapd:
status:	New → Won't Fix

a59ff5 (a59ff5a59ff5) on 2020-03-13

Changed in snapd (Ubuntu Zesty):
assignee:	nobody → Slavik (slavikstar)

a59ff5 (a59ff5a59ff5) on 2020-06-19

information type:

Public → Private

a59ff5 (a59ff5a59ff5) on 2021-03-28

description:

updated

a59ff5 (a59ff5a59ff5) on 2021-03-28

Changed in snapd (Ubuntu Xenial):
status:	Confirmed → In Progress
Changed in snapd (Ubuntu Zesty):
status:	Confirmed → In Progress
Changed in dpkg (Ubuntu Trusty):
status:	Confirmed → In Progress
Changed in dpkg (Ubuntu Xenial):
status:	Confirmed → In Progress
Changed in dpkg (Ubuntu Zesty):
status:	Confirmed → In Progress

a59ff5 (a59ff5a59ff5) on 2021-03-28

Changed in snapd (Ubuntu Yakkety):
status:	Invalid → In Progress
Changed in snapd (Ubuntu Zesty):
assignee:	a59ff5 (a59ff5a59ff5) → nobody
Changed in snapd (Ubuntu):
assignee:	Michael Vogt (mvo) → nobody
Changed in dpkg (Ubuntu Yakkety):
status:	Invalid → In Progress

a59ff5 (a59ff5a59ff5) on 2021-03-29

information type:	Private → Public
Changed in snapd (Ubuntu):
status:	In Progress → Fix Released
Changed in dpkg (Ubuntu):
status:	In Progress → Fix Released
Changed in dpkg (Ubuntu Trusty):
status:	In Progress → Fix Released
Changed in dpkg (Ubuntu Xenial):
status:	In Progress → Fix Released
Changed in dpkg (Ubuntu Yakkety):
status:	In Progress → Fix Released
Changed in snapd (Ubuntu Trusty):
status:	In Progress → Fix Released

a59ff5 (a59ff5a59ff5) on 2021-03-29

Changed in snapd (Ubuntu Xenial):
status:	In Progress → Fix Released
Changed in snapd (Ubuntu Yakkety):
status:	In Progress → Fix Released
Changed in snapd (Ubuntu Zesty):
status:	In Progress → Fix Released

a59ff5 (a59ff5a59ff5) on 2021-03-29

Changed in dpkg (Ubuntu Zesty):
status:	In Progress → Fix Released

Colin Watson (cjwatson) on 2021-03-29

Changed in snapd (Ubuntu Xenial):
status:	Fix Released → Confirmed
Changed in snapd (Ubuntu Zesty):
status:	Fix Released → Confirmed
Changed in dpkg (Ubuntu Trusty):
status:	Fix Released → Confirmed
Changed in dpkg (Ubuntu Xenial):
status:	Fix Released → Confirmed
Changed in dpkg (Ubuntu Zesty):
status:	Fix Released → Confirmed
Changed in snapd (Ubuntu Yakkety):
status:	Fix Released → Invalid
Changed in snapd (Ubuntu):
assignee:	nobody → Michael Vogt (mvo)
Changed in dpkg (Ubuntu Yakkety):
status:	Fix Released → Invalid
Changed in snapd (Ubuntu):
status:	Fix Released → In Progress
Changed in dpkg (Ubuntu):
status:	Fix Released → In Progress

Colin Watson (cjwatson) on 2021-03-29

Changed in snapd (Ubuntu Trusty):
status:	Fix Released → In Progress

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package snapd 2.23.1 failed to install/upgrade: trying to overwrite '/etc/apparmor.d/usr.lib.snapd.snap-confine', which is also in package snap-confine 2.23.1

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