pmtu.sh net selftest fail with PMTU dst likely leaked (can't delete veth device in a timely manner, PMTU dst likely leaked)

Bug #1881643 reported by Thadeu Lima de Souza Cascardo on 2020-06-01
14
This bug affects 2 people
Affects Status Importance Assigned to Milestone
ubuntu-kernel-tests
Undecided
Unassigned
linux (Ubuntu)
Undecided
Unassigned
Focal
Undecided
Unassigned

Bug Description

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/ppc64el/l/linux/20200528_044656_7f57a@/log.gz

[...]
03:48:34 DEBUG| [stdout] # TEST: ipv6: cleanup of cached exceptions - nexthop objects [FAIL]
03:48:34 DEBUG| [stdout] # can't delete veth device in a timely manner, PMTU dst likely leaked
[...]
03:49:17 DEBUG| [stdout] not ok 16 selftests: net: pmtu.sh # exit=1

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1881643

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
Changed in linux (Ubuntu Focal):
status: New → Confirmed
Po-Hsu Lin (cypressyew) on 2020-06-08
tags: added: 5.4 focal ppc64el sru-20200518 ubuntu-kernel-selftests
Po-Hsu Lin (cypressyew) on 2020-06-08
tags: added: kqa-blocker

Different output for Groovy/linux 5.8.0-30.32 on s390x

19:34:43 DEBUG| [stdout] # TEST: ipv4: cleanup of cached exceptions [ OK ]
19:34:44 DEBUG| [stdout] # TEST: ipv4: cleanup of cached exceptions - nexthop objects [FAIL]
19:34:44 DEBUG| [stdout] # can't delete veth device in a timely manner, PMTU dst likely leaked

tags: added: groovy s390x sru-20201109
tags: added: 5.8
Po-Hsu Lin (cypressyew) on 2020-12-01
summary: - pmtu.sh net selftest fail with PMTU dst likely leaked
+ pmtu.sh net selftest fail with PMTU dst likely leaked (ipv6: cleanup of
+ cached exceptions - nexthop objects [FAIL])
summary: - pmtu.sh net selftest fail with PMTU dst likely leaked (ipv6: cleanup of
- cached exceptions - nexthop objects [FAIL])
+ pmtu.sh net selftest fail with PMTU dst likely leaked (can't delete veth
+ device in a timely manner, PMTU dst likely leaked)
tags: added: hirsute
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