Public bug reported:
pmtu.sh is a network selftest that was introduced on 4.17. It is
currently failing on 4.18. After revert of ccd740cbc6 "vti6: Add pmtu
handling to vti6_xmit.", it passes.
The fail is in the nature of holding netdevices refcounts, so some
network operations start hanging, including the loading and removal of
network modules.
[ 159.936543] unregister_netdevice: waiting for veth_b to become free.
Usage count = 1
** Affects: linux (Ubuntu)
Importance: Medium
Assignee: Thadeu Lima de Souza Cascardo (cascardo)
Status: Triaged
** Affects: linux (Ubuntu Cosmic)
Importance: Medium
Assignee: Thadeu Lima de Souza Cascardo (cascardo)
Status: Triaged
** Also affects: linux (Ubuntu Cosmic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Cosmic)
Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)
** Changed in: linux (Ubuntu Cosmic)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Cosmic)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1789436
Title:
pmtu.sh fails on 4.18 kernel
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