[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: Fix Committed => Fix Released

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Launchpad Bug Tracker]

This bug was fixed in the package iproute2 - 4.9.0-1ubuntu2.1

---
iproute2 (4.9.0-1ubuntu2.1) artful; urgency=medium

  * Fix ip maddr show (LP: #1732032):
- d/p/1003-ip-maddr-fix-igmp-parsing.patch: fix igmp parsing when iface is
  long
- d/p/1004-ip-maddr-avoid-uninitialized-data.patch: avoid accessing
  uninitialized data
- d/p/1005-ip-maddr-fix-filtering-by-device.patch: fix filtering
  by device
  * d/p/1006-fix-undeclared-UINT16_MAX.patch: FTBFS: tc: include stdint.h
explicitly for UINT16_MAX (LP: #1735158)

 -- Andreas Hasenack   Wed, 29 Nov 2017 11:02:27
-0200

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Launchpad Bug Tracker]

This bug was fixed in the package iproute2 - 4.3.0-1ubuntu3.16.04.3

---
iproute2 (4.3.0-1ubuntu3.16.04.3) xenial; urgency=medium

  * Fix ip maddr show (LP: #1732032):
- d/p/1005-ip-maddr-fix-igmp-parsing.patch: fix igmp parsing when iface is
  long
- d/p/1006-ip-maddr-avoid-uninitialized-data.patch: avoid accessing
  uninitialized data
- d/p/1007-ip-maddr-fix-filtering-by-device.patch: fix filtering
  by device

 -- Andreas Hasenack   Wed, 29 Nov 2017 15:04:40
-0200

** Changed in: iproute2 (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

** Changed in: iproute2 (Ubuntu Artful)
   Status: Fix Committed => Fix Released

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Launchpad Bug Tracker]

This bug was fixed in the package iproute2 - 3.12.0-2ubuntu1.2

---
iproute2 (3.12.0-2ubuntu1.2) trusty; urgency=medium

  * Fix ip maddr show (LP: #1732032):
- d/p/1003-ip-maddr-fix-igmp-parsing.patch: fix igmp parsing when iface is
  long
- d/p/1004-ip-maddr-avoid-uninitialized-data.patch: avoid accessing
  uninitialized data
- d/p/1005-ip-maddr-fix-filtering-by-device.patch: fix filtering
  by device

 -- Andreas Hasenack   Wed, 29 Nov 2017 17:15:25
-0200

** Changed in: iproute2 (Ubuntu Trusty)
   Status: Fix Committed => Fix Released

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

I installed the updated package on an existing maas server on
xenial/amd64, and deployed a new node (also xenial/amd64) where I also
installed the updated package plus some server software. No visible side
effects.

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

Well, network-manager depends on iproute2, as do many other things. When
I try to remove iproute2 from my system I get this:

The following packages will be REMOVED:
  gnome-control-center* ifupdown* iproute2* isc-dhcp-client* keepalived* 
network-manager* network-manager-config-connectivity-ubuntu* 
network-manager-gnome* network-manager-openvpn*
  network-manager-openvpn-gnome* network-manager-pptp* 
network-manager-pptp-gnome* openvpn* pppoeconf* ubuntu-desktop*

Of these I use extensively openvpn (via network manager) and, although
it's not listed as a dependency, lxd (in the host), which I just
confirmed uses iproute2 to set up its bridges and networking.

That being said, this is on artful, not xenial. The xenial dep8 tests in
the excuses page are all green, though.

I'll setup up a xenial vm, with a lot of networking "things" (nics,
bridges, server software), update iproute2, and let it boot.

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Robie Basak]

Thanks. That all looks fine then.

> Regarding amd64 smoke test, I've been using the updated package on my
machine (artful/amd64).

Does that actually exercise the ip command though? Or are you using
Network Manager, and does it speak to the kernel directly?

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

I had a super nice and detailed reply written here, but of course I lost
it. Browsers are stupid things sometimes. So here are the comments that
survived.

TL;DR:
firejail is known to fail on s390 because there is no thunderbird package for a 
mainframe. I emailed ubuntu-devel@ and also pinged #ubuntu-devel on irc. 
Switching the test bed from a container to a VM for s390 a while back allowed 
this new test to run.

Others are green, with the exception of trusty:
a) armhf: fails copying the device /dev/null elsewhere with -a, which equates 
to creating a device outside of tmp, which is forbidden. Last time this worked 
was when the test bed was on lxc in 2016. On lxd it doesn't work. The other 
architectures are not using lxd. We should probably add a constraint so that 
the test only runs in vms. Should it be added to the current SRU package for 
trusty?

b) ppc: a grub error:
Generating grub configuration file ...
grub-probe: error: not a directory.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1

I pinged #ubuntu-devel about it, since I have no idea how to setup and
run a ppc vm, but got no response:

https://irclogs.ubuntu.com/2017/12/07/%23ubuntu-devel.html#t19:33

ahasenack   is there something going on with setting up ppc64el autopkg 
tests in excuses? I have 3 different packages failing there with the same error 
19:33
ahasenack   grub-probe: error: not a directory. 19:33
ahasenack   run-parts: /etc/kernel/postinst.d/zz-update-grub exited with 
return code 1  19:33
ahasenack   in trusty   19:33
ahasenack   
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-trusty/trusty/ppc64el/a/autopkgtest/20171207_002904_c5112@/log.gz
 is one of them

Got no response. I don't even know if grub is used in ppc.


Regarding amd64 smoke test, I've been using the updated package on my machine 
(artful/amd64).

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Robie Basak]

Could someone look at the autopkgtest failures listed against iproute2
in http://people.canonical.com/~ubuntu-archive/pending-sru.html please?
IIRC, firejail on s390x is a false positive? But there are some others,
too.

Also, has anyone done a quite smoke on amd64 to make sure the "ip"
command still works there? If not, could you please do that? It's quite
a core package and I don't want to find out that regressed the world by
pressing the button to release this without checking this. Sorry, I
should have asked for that at review/accept time.

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Frank Heimes]

** Changed in: ubuntu-power-systems
   Status: In Progress => Fix Committed

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[bugproxy]

--- Comment From ru...@us.ibm.com 2017-12-08 13:55 EDT---
Verified 3.12.0-2ubuntu1.2 for trusty

** Tags removed: targetmilestone-inin--- verification-needed 
verification-needed-trusty
** Tags added: targetmilestone-inin1704 verification-done 
verification-done-trusty

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[bugproxy]

--- Comment From ru...@us.ibm.com 2017-12-08 11:38 EDT---
Validated 4.9.0-1ubuntu1.1 for zesty

** Tags removed: verification-needed-zesty
** Tags added: verification-done-zesty

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[bugproxy]

--- Comment From ru...@us.ibm.com 2017-12-07 17:19 EDT---
Validated 4.9.0-1ubuntu2.1 for artful:

root@artful:~# ip maddr show reallylongname
5:  reallylongname
link  33:33:00:00:00:01
link  01:00:5e:00:00:01
link  33:33:ff:0c:0c:27
link  33:33:00:01:00:03
inet  224.0.0.1
inet6 ff02::1:3
inet6 ff02::1:ff0c:c27
inet6 ff02::1
inet6 ff01::1

** Tags removed: verification-needed-artful
** Tags added: verification-done-artful

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[bugproxy]

--- Comment From ru...@us.ibm.com 2017-12-07 17:15 EDT---
Validated 4.3.0-1ubuntu3.16.04.3 for xenial.

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Robie Basak]

Hello bugproxy, or anyone else affected,

Accepted iproute2 into trusty-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/iproute2/3.12.0-2ubuntu1.2 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-trusty to verification-done-trusty. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-trusty. In either case, details of your
testing will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: iproute2 (Ubuntu Trusty)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-trusty

** Changed in: iproute2 (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Tags added: verification-needed-xenial

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Changed in: iproute2 (Ubuntu Trusty)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu Artful)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Artful)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Trusty)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

** Changed in: iproute2 (Ubuntu Xenial)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

** Changed in: iproute2 (Ubuntu Zesty)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

** Changed in: iproute2 (Ubuntu Artful)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Changed in: iproute2 (Ubuntu Trusty)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu Artful)
   Status: New => In Progress

** Changed in: iproute2 (Ubuntu)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Artful)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: iproute2 (Ubuntu Trusty)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

** Changed in: iproute2 (Ubuntu Xenial)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

** Changed in: iproute2 (Ubuntu Zesty)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

** Changed in: iproute2 (Ubuntu Artful)
 Assignee: (unassigned) => Andreas Hasenack (ahasenack)

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: Triaged => In Progress

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Launchpad Bug Tracker]

This bug was fixed in the package iproute2 - 4.9.0-1ubuntu3

---
iproute2 (4.9.0-1ubuntu3) bionic; urgency=medium

  * Fix ip maddr show (LP: #1732032):
- d/p/1003-ip-maddr-fix-igmp-parsing.patch: fix igmp parsing when iface is
  long
- d/p/1004-ip-maddr-avoid-uninitialized-data.patch: avoid accessing
  uninitialized data
- d/p/1005-ip-maddr-fix-filtering-by-device.patch: fix filtering
  by device
  * d/p/1006-fix-undeclared-UINT16_MAX.patch: FTBFS: tc: include stdint.h
explicitly for UINT16_MAX (LP: #1735158)

 -- Andreas Hasenack   Wed, 29 Nov 2017 09:35:46
-0200

** Changed in: iproute2 (Ubuntu)
   Status: In Progress => Fix Released

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Launchpad Bug Tracker]

** Merge proposal linked:
   
https://code.launchpad.net/~ahasenack/ubuntu/+source/iproute2/+git/iproute2/+merge/334482

** Merge proposal linked:
   
https://code.launchpad.net/~ahasenack/ubuntu/+source/iproute2/+git/iproute2/+merge/334484

** Merge proposal linked:
   
https://code.launchpad.net/~ahasenack/ubuntu/+source/iproute2/+git/iproute2/+merge/334485

** Merge proposal linked:
   
https://code.launchpad.net/~ahasenack/ubuntu/+source/iproute2/+git/iproute2/+merge/334486

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Launchpad Bug Tracker]

** Merge proposal linked:
   
https://code.launchpad.net/~ahasenack/ubuntu/+source/iproute2/+git/iproute2/+merge/334476

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Description changed:

  [Impact]
+ When a nic has a long enough name such that there is no space between the 
name and the ":" in /proc/net/igmp, ip maddr show dev  will miss the IPV4 
addresses which is otherwise shown with "ip maddr show".
  
-  * An explanation of the effects of the bug on users and
+ This is inconsistent behavior and can break scripts and tests, as shown
+ in this bug's original description.
  
-  * justification for backporting the fix to the stable release.
- 
-  * In addition, it is helpful, but not required, to include an
-explanation of how the upload fixes this bug.
+ Three patches from upstream were taken to fix this bug, and they were used 
individually instead of being merged into one single patch so it's easier to 
track and recognize authorship:
+ 
https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/commit/?id=530903dd9003492edb0714e937ad4a5d1219e376
+ 
https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/commit/?id=b48a1161f5f9b6a0cda399a224bbbf72eba4a5c6
+ 
https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/commit/?id=21503ed2af233ffe795926f6641ac84ec1b15bf9
  
  [Test Case]
+ * deploy the ubuntu release under test. Please use bare metal or a VM instead 
of containers, because the ip tool parses a file in /proc. Make sure iproute2 
is installed:
+ sudo apt install iproute2
  
-  * detailed instructions how to reproduce the bug
+ * Run these commands to setup a dummy interface with a long name and an
+ IPv4 address. Please change the address if it conflicts with a real
+ network you might have available on that machine:
  
-  * these should allow someone who is not familiar with the affected
-package to reproduce the bug and verify that the updated package fixes
-the problem.
+ sudo ip link add dummylongnic0 type dummy
+ sudo ip addr add 192.168.199.10/24 dev dummylongnic0
+ sudo ip link set dev dummylongnic0 up
+ 
+ * Compare the output of these two commands with regards to the dummylongnic0 
interface:
+ sudo ip maddr show
+ sudo ip maddr show dev dummylongnic0
+ 
+ * With the buggy iproute2 package installed, the more specific output "ip 
maddr show dev dummylongnic0" should lack the "inet 224.0.0.1" line:
+ ip maddr show dev dummylongnic0
+ 2:dummylongnic0
+   link  33:33:00:00:00:01
+   link  01:00:5e:00:00:01
+   inet6 ff02::1
+   inet6 ff01::1
+ 
+ 
+ Whereas the less specific command, which lists all interfaces, will have it 
listed for dummylongnic0:
+ 2:dummylongnic0
+   link  33:33:00:00:00:01
+   link  01:00:5e:00:00:01
+   inet  224.0.0.1
+   inet6 ff02::1
+   inet6 ff01::1
+ 
+ 
+ * With the fixed iproute2 package, all dummylongnic0 addresses will be 
present in both outputs.
+ 
  
  [Regression Potential]
- 
-  * discussion of how regressions are most likely to manifest as a result
- of this change.
- 
-  * It is assumed that any SRU candidate patch is well-tested before
-upload and has a low overall risk of regression, but it's important
-to make the effort to think about what ''could'' happen in the
-event of a regression.
- 
-  * This both shows the SRU team that the risks have been considered,
-and provides guidance to testers in regression-testing the SRU.
+ In the end, the ip tool is parsing a text file produced by the kernel. As 
most parsing done in C, it's pretty low level and sensitive to changes in the 
file it's reading.
  
  [Other Info]
-  
-  * Anything else you think is useful to include
-  * Anticipate questions from users, SRU, +1 maintenance, security teams and 
the Technical Board
-  * and address these questions in advance
- 
+ I suggest to conduct the tests in VMs instead of containers (LXD) because the 
ip maddr command parses /proc/net/igmp, which is produced by the kernel. If you 
use a container, then it's the host's kernel that will be providing that file 
and it might not be the same as with the native kernel of that particular 
ubuntu release.
  
  --- Original description ---
  Attn. Canonical:  Please make sure that the existing iproute2 package gets 
updated with the two referenced patches as the missing information is impacting 
our standard test suites.
  
  Thanks.
  
  == Comment: #0 - Alton L. Pundt - 2017-03-29 14:37:57 ==
  ---Problem Description---
  ip maddr show and ip maddr show dev enP20p96s0 show different data
  
  ---uname output---
  Linux roselp1 4.10.0-14-generic #16-Ubuntu SMP Fri Mar 17 15:19:05 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux
  
  Machine Type = 8286-42A
  
  ---Steps to Reproduce---
   run these at command line:
  root@roselp1:~# ip maddr show
  ...
  10: enP20p96s0
  link  33:33:00:00:00:01
  link  01:00:5e:00:00:01
  link  33:33:ff:6d:d0:d0
  link  01:00:5e:00:00:fc
  link  33:33:00:01:00:03
  inet  224.0.0.252
  inet  224.0.0.1
  inet6 ff02::1:3
  inet6 ff02::1:ff6d:d0d0 users 3
     

[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Description changed:

  [Impact]
+ When a nic has a long enough name such that there is no space between the 
name and the ":" in /proc/net/igmp, ip maddr show dev  will miss the IPV4 
addresses which is otherwise shown with "ip maddr show".
  
-  * An explanation of the effects of the bug on users and
+ This is inconsistent behavior and can break scripts and tests, as shown
+ in this bug's original description.
  
-  * justification for backporting the fix to the stable release.
- 
-  * In addition, it is helpful, but not required, to include an
-explanation of how the upload fixes this bug.
+ Three patches from upstream were taken to fix this bug, and they were used 
individually instead of being merged into one single patch so it's easier to 
track and recognize authorship:
+ 
https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/commit/?id=530903dd9003492edb0714e937ad4a5d1219e376
+ 
https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/commit/?id=b48a1161f5f9b6a0cda399a224bbbf72eba4a5c6
+ 
https://git.kernel.org/pub/scm/linux/kernel/git/shemminger/iproute2.git/commit/?id=21503ed2af233ffe795926f6641ac84ec1b15bf9
  
  [Test Case]
+ * deploy the ubuntu release under test. Please use bare metal or a VM instead 
of containers, because the ip tool parses a file in /proc. Make sure iproute2 
is installed:
+ sudo apt install iproute2
  
-  * detailed instructions how to reproduce the bug
+ * Run these commands to setup a dummy interface with a long name and an
+ IPv4 address. Please change the address if it conflicts with a real
+ network you might have available on that machine:
  
-  * these should allow someone who is not familiar with the affected
-package to reproduce the bug and verify that the updated package fixes
-the problem.
+ sudo ip link add dummylongnic0 type dummy
+ sudo ip addr add 192.168.199.10/24 dev dummylongnic0
+ sudo ip link set dev dummylongnic0 up
+ 
+ * Compare the output of these two commands with regards to the dummylongnic0 
interface:
+ sudo ip maddr show
+ sudo ip maddr show dev dummylongnic0
+ 
+ * With the buggy iproute2 package installed, the more specific output "ip 
maddr show dev dummylongnic0" should lack the "inet 224.0.0.1" line:
+ ip maddr show dev dummylongnic0
+ 2:dummylongnic0
+   link  33:33:00:00:00:01
+   link  01:00:5e:00:00:01
+   inet6 ff02::1
+   inet6 ff01::1
+ 
+ 
+ Whereas the less specific command, which lists all interfaces, will have it 
listed for dummylongnic0:
+ 2:dummylongnic0
+   link  33:33:00:00:00:01
+   link  01:00:5e:00:00:01
+   inet  224.0.0.1
+   inet6 ff02::1
+   inet6 ff01::1
+ 
+ 
+ * With the fixed iproute2 package, all dummylongnic0 addresses will be 
present in both outputs.
+ 
  
  [Regression Potential]
- 
-  * discussion of how regressions are most likely to manifest as a result
- of this change.
- 
-  * It is assumed that any SRU candidate patch is well-tested before
-upload and has a low overall risk of regression, but it's important
-to make the effort to think about what ''could'' happen in the
-event of a regression.
- 
-  * This both shows the SRU team that the risks have been considered,
-and provides guidance to testers in regression-testing the SRU.
+ In the end, the ip tool is parsing a text file produced by the kernel. As 
most parsing done in C, it's pretty low level and sensitive to changes in the 
file it's reading.
  
  [Other Info]
-  
-  * Anything else you think is useful to include
-  * Anticipate questions from users, SRU, +1 maintenance, security teams and 
the Technical Board
-  * and address these questions in advance
- 
+ I suggest to conduct the tests in VMs instead of containers (LXD) because the 
ip maddr command parses /proc/net/igmp, which is produced by the kernel. If you 
use a container, then it's the host's kernel that will be providing that file 
and it might not be the same as with the native kernel of that particular 
ubuntu release.
  
  --- Original description ---
  Attn. Canonical:  Please make sure that the existing iproute2 package gets 
updated with the two referenced patches as the missing information is impacting 
our standard test suites.
  
  Thanks.
  
  == Comment: #0 - Alton L. Pundt - 2017-03-29 14:37:57 ==
  ---Problem Description---
  ip maddr show and ip maddr show dev enP20p96s0 show different data
  
  ---uname output---
  Linux roselp1 4.10.0-14-generic #16-Ubuntu SMP Fri Mar 17 15:19:05 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux
  
  Machine Type = 8286-42A
  
  ---Steps to Reproduce---
   run these at command line:
  root@roselp1:~# ip maddr show
  ...
  10: enP20p96s0
  link  33:33:00:00:00:01
  link  01:00:5e:00:00:01
  link  33:33:ff:6d:d0:d0
  link  01:00:5e:00:00:fc
  link  33:33:00:01:00:03
  inet  224.0.0.252
  inet  224.0.0.1
  inet6 ff02::1:3
  inet6 ff02::1:ff6d:d0d0 users 3
     

[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Seth Arnold]

** Also affects: iproute2 (Ubuntu Artful)
   Importance: Undecided
   Status: New

** Also affects: iproute2 (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Also affects: iproute2 (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: iproute2 (Ubuntu Zesty)
   Importance: Undecided
   Status: New

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https://bugs.launchpad.net/bugs/1732032

Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Description changed:

- Attn. Canonical:  Please make sure that the existing iproute2 package
- gets updated with the two referenced patches as the missing information
- is impacting our standard test suites.
+ [Impact]
+ 
+  * An explanation of the effects of the bug on users and
+ 
+  * justification for backporting the fix to the stable release.
+ 
+  * In addition, it is helpful, but not required, to include an
+explanation of how the upload fixes this bug.
+ 
+ [Test Case]
+ 
+  * detailed instructions how to reproduce the bug
+ 
+  * these should allow someone who is not familiar with the affected
+package to reproduce the bug and verify that the updated package fixes
+the problem.
+ 
+ [Regression Potential]
+ 
+  * discussion of how regressions are most likely to manifest as a result
+ of this change.
+ 
+  * It is assumed that any SRU candidate patch is well-tested before
+upload and has a low overall risk of regression, but it's important
+to make the effort to think about what ''could'' happen in the
+event of a regression.
+ 
+  * This both shows the SRU team that the risks have been considered,
+and provides guidance to testers in regression-testing the SRU.
+ 
+ [Other Info]
+  
+  * Anything else you think is useful to include
+  * Anticipate questions from users, SRU, +1 maintenance, security teams and 
the Technical Board
+  * and address these questions in advance
+ 
+ 
+ --- Original description ---
+ Attn. Canonical:  Please make sure that the existing iproute2 package gets 
updated with the two referenced patches as the missing information is impacting 
our standard test suites.
  
  Thanks.
  
  == Comment: #0 - Alton L. Pundt - 2017-03-29 14:37:57 ==
  ---Problem Description---
  ip maddr show and ip maddr show dev enP20p96s0 show different data
-  
+ 
  ---uname output---
  Linux roselp1 4.10.0-14-generic #16-Ubuntu SMP Fri Mar 17 15:19:05 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux
-  
- Machine Type = 8286-42A 
-  
+ 
+ Machine Type = 8286-42A
+ 
  ---Steps to Reproduce---
-  run these at command line:
+  run these at command line:
  root@roselp1:~# ip maddr show
  ...
  10: enP20p96s0
- link  33:33:00:00:00:01
- link  01:00:5e:00:00:01
- link  33:33:ff:6d:d0:d0
- link  01:00:5e:00:00:fc
- link  33:33:00:01:00:03
- inet  224.0.0.252
- inet  224.0.0.1
- inet6 ff02::1:3
- inet6 ff02::1:ff6d:d0d0 users 3
- inet6 ff02::1
- inet6 ff01::1
+ link  33:33:00:00:00:01
+ link  01:00:5e:00:00:01
+ link  33:33:ff:6d:d0:d0
+ link  01:00:5e:00:00:fc
+ link  33:33:00:01:00:03
+ inet  224.0.0.252
+ inet  224.0.0.1
+ inet6 ff02::1:3
+ inet6 ff02::1:ff6d:d0d0 users 3
+ inet6 ff02::1
+ inet6 ff01::1
  ...
  
  root@roselp1:~# ip maddr show dev enP20p96s0
  10: enP20p96s0
- link  33:33:00:00:00:01
- link  01:00:5e:00:00:01
- link  33:33:ff:6d:d0:d0
- link  01:00:5e:00:00:fc
- link  33:33:00:01:00:03
- inet6 ff02::1:3
- inet6 ff02::1:ff6d:d0d0 users 3
- inet6 ff02::1
- inet6 ff01::1
-  
+ link  33:33:00:00:00:01
+ link  01:00:5e:00:00:01
+ link  33:33:ff:6d:d0:d0
+ link  01:00:5e:00:00:fc
+ link  33:33:00:01:00:03
+ inet6 ff02::1:3
+ inet6 ff02::1:ff6d:d0d0 users 3
+ inet6 ff02::1
+ inet6 ff01::1
+ 
  == Comment: #12 - David Z. Dai  - 2017-11-13 15:07:32 ==
  
  I found upstream already had patches that fix this problem:
  
  1) https://www.spinics.net/lists/netdev/msg415009.html
  commit 530903dd9003492edb0714e937ad4a5d1219e376
  Author: Petr Vorel 
  Date:   Tue Jan 17 00:25:50 2017 +0100
  
- ip: fix igmp parsing when iface is long
+ ip: fix igmp parsing when iface is long
  
- Entries with long vhost names in /proc/net/igmp have no whitespace
- between name and colon, so sscanf() adds it to vhost and
- 'ip maddr show iface' doesn't include inet result.
+ Entries with long vhost names in /proc/net/igmp have no whitespace
+ between name and colon, so sscanf() adds it to vhost and
+ 'ip maddr show iface' doesn't include inet result.
  
- Signed-off-by: Petr Vorel 
- 
+ Signed-off-by: Petr Vorel 
  
  2) https://www.spinics.net/lists/netdev/msg461479.html
  commit 21503ed2af233ffe795926f6641ac84ec1b15bf9
  Author: Michal Kubecek 
  Date:   Thu Oct 19 10:21:08 2017 +0200
  
- ip maddr: fix filtering by device
+ ip maddr: fix filtering by device
  
- Commit 530903dd9003 ("ip: fix igmp parsing when iface is long") uses
- variable len to keep trailing colon from interface name comparison.  This
- variable is local to loop body but we set it in one pass and use it in
- following one(s) so that we are actually using 

[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Description changed:

- Attn. Canonical:  Please make sure that the existing iproute2 package
- gets updated with the two referenced patches as the missing information
- is impacting our standard test suites.
+ [Impact]
+ 
+  * An explanation of the effects of the bug on users and
+ 
+  * justification for backporting the fix to the stable release.
+ 
+  * In addition, it is helpful, but not required, to include an
+explanation of how the upload fixes this bug.
+ 
+ [Test Case]
+ 
+  * detailed instructions how to reproduce the bug
+ 
+  * these should allow someone who is not familiar with the affected
+package to reproduce the bug and verify that the updated package fixes
+the problem.
+ 
+ [Regression Potential]
+ 
+  * discussion of how regressions are most likely to manifest as a result
+ of this change.
+ 
+  * It is assumed that any SRU candidate patch is well-tested before
+upload and has a low overall risk of regression, but it's important
+to make the effort to think about what ''could'' happen in the
+event of a regression.
+ 
+  * This both shows the SRU team that the risks have been considered,
+and provides guidance to testers in regression-testing the SRU.
+ 
+ [Other Info]
+  
+  * Anything else you think is useful to include
+  * Anticipate questions from users, SRU, +1 maintenance, security teams and 
the Technical Board
+  * and address these questions in advance
+ 
+ 
+ --- Original description ---
+ Attn. Canonical:  Please make sure that the existing iproute2 package gets 
updated with the two referenced patches as the missing information is impacting 
our standard test suites.
  
  Thanks.
  
  == Comment: #0 - Alton L. Pundt - 2017-03-29 14:37:57 ==
  ---Problem Description---
  ip maddr show and ip maddr show dev enP20p96s0 show different data
-  
+ 
  ---uname output---
  Linux roselp1 4.10.0-14-generic #16-Ubuntu SMP Fri Mar 17 15:19:05 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux
-  
- Machine Type = 8286-42A 
-  
+ 
+ Machine Type = 8286-42A
+ 
  ---Steps to Reproduce---
-  run these at command line:
+  run these at command line:
  root@roselp1:~# ip maddr show
  ...
  10: enP20p96s0
- link  33:33:00:00:00:01
- link  01:00:5e:00:00:01
- link  33:33:ff:6d:d0:d0
- link  01:00:5e:00:00:fc
- link  33:33:00:01:00:03
- inet  224.0.0.252
- inet  224.0.0.1
- inet6 ff02::1:3
- inet6 ff02::1:ff6d:d0d0 users 3
- inet6 ff02::1
- inet6 ff01::1
+ link  33:33:00:00:00:01
+ link  01:00:5e:00:00:01
+ link  33:33:ff:6d:d0:d0
+ link  01:00:5e:00:00:fc
+ link  33:33:00:01:00:03
+ inet  224.0.0.252
+ inet  224.0.0.1
+ inet6 ff02::1:3
+ inet6 ff02::1:ff6d:d0d0 users 3
+ inet6 ff02::1
+ inet6 ff01::1
  ...
  
  root@roselp1:~# ip maddr show dev enP20p96s0
  10: enP20p96s0
- link  33:33:00:00:00:01
- link  01:00:5e:00:00:01
- link  33:33:ff:6d:d0:d0
- link  01:00:5e:00:00:fc
- link  33:33:00:01:00:03
- inet6 ff02::1:3
- inet6 ff02::1:ff6d:d0d0 users 3
- inet6 ff02::1
- inet6 ff01::1
-  
+ link  33:33:00:00:00:01
+ link  01:00:5e:00:00:01
+ link  33:33:ff:6d:d0:d0
+ link  01:00:5e:00:00:fc
+ link  33:33:00:01:00:03
+ inet6 ff02::1:3
+ inet6 ff02::1:ff6d:d0d0 users 3
+ inet6 ff02::1
+ inet6 ff01::1
+ 
  == Comment: #12 - David Z. Dai  - 2017-11-13 15:07:32 ==
  
  I found upstream already had patches that fix this problem:
  
  1) https://www.spinics.net/lists/netdev/msg415009.html
  commit 530903dd9003492edb0714e937ad4a5d1219e376
  Author: Petr Vorel 
  Date:   Tue Jan 17 00:25:50 2017 +0100
  
- ip: fix igmp parsing when iface is long
+ ip: fix igmp parsing when iface is long
  
- Entries with long vhost names in /proc/net/igmp have no whitespace
- between name and colon, so sscanf() adds it to vhost and
- 'ip maddr show iface' doesn't include inet result.
+ Entries with long vhost names in /proc/net/igmp have no whitespace
+ between name and colon, so sscanf() adds it to vhost and
+ 'ip maddr show iface' doesn't include inet result.
  
- Signed-off-by: Petr Vorel 
- 
+ Signed-off-by: Petr Vorel 
  
  2) https://www.spinics.net/lists/netdev/msg461479.html
  commit 21503ed2af233ffe795926f6641ac84ec1b15bf9
  Author: Michal Kubecek 
  Date:   Thu Oct 19 10:21:08 2017 +0200
  
- ip maddr: fix filtering by device
+ ip maddr: fix filtering by device
  
- Commit 530903dd9003 ("ip: fix igmp parsing when iface is long") uses
- variable len to keep trailing colon from interface name comparison.  This
- variable is local to loop body but we set it in one pass and use it in
- following one(s) so that we are actually using 

[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

We also need to fix the FTBFS problem in order to proceed with an SRU:
https://bugs.launchpad.net/ubuntu/+source/iproute2/+bug/1735158

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Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

We also need to fix the FTBFS problem in order to proceed with an SRU:
https://bugs.launchpad.net/ubuntu/+source/iproute2/+bug/1735158

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https://bugs.launchpad.net/bugs/1732032

Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

commit ae717baf15fb4d30749ada3948d9445892bac239
Author: Khem Raj 
Date:   Sat May 20 14:28:46 2017 -0700

tc: include stdint.h explicitly for UINT16_MAX

Fixes
| tc_core.c:190:29: error: 'UINT16_MAX' undeclared (first use in this 
function); did you mean '__INT16_MAX__'?
|if ((sz >> s->size_log) > UINT16_MAX) {
|  ^~

Signed-off-by: Khem Raj 

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Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

commit ae717baf15fb4d30749ada3948d9445892bac239
Author: Khem Raj 
Date:   Sat May 20 14:28:46 2017 -0700

tc: include stdint.h explicitly for UINT16_MAX

Fixes
| tc_core.c:190:29: error: 'UINT16_MAX' undeclared (first use in this 
function); did you mean '__INT16_MAX__'?
|if ((sz >> s->size_log) > UINT16_MAX) {
|  ^~

Signed-off-by: Khem Raj 

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Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Changed in: iproute2 (Ubuntu)
   Status: New => In Progress

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Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andreas Hasenack]

** Changed in: iproute2 (Ubuntu)
   Status: New => In Progress

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Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[David Britton]

** Changed in: iproute2 (Ubuntu)
 Assignee: David Britton (davidpbritton) => Andreas Hasenack (ahasenack)

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Title:
  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Manoj Iyer]

** Changed in: ubuntu-power-systems
 Assignee: David Britton (davidpbritton) => Canonical Server Team 
(canonical-server)

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andrew Cloke]

** Changed in: ubuntu-power-systems
   Status: New => Triaged

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Manoj Iyer]

** Changed in: iproute2 (Ubuntu)
 Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) => 
David Britton (davidpbritton)

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Andrew Cloke]

** Changed in: ubuntu-power-systems
 Assignee: Canonical Server Team (canonical-server) => David Britton 
(davidpbritton)

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Frank Heimes]

** Changed in: ubuntu-power-systems
 Assignee: (unassigned) => Canonical Server Team (canonical-server)

** Changed in: ubuntu-power-systems
   Importance: Undecided => Medium

** Tags added: triage-g

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  ip maddr show and ip maddr show dev enP20p96s0 show different data

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[Bug 1732032] Re: ip maddr show and ip maddr show dev enP20p96s0 show different data

[Frank Heimes]

** Also affects: ubuntu-power-systems
   Importance: Undecided
   Status: New

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