Bug#917128: udev 240 breaks network interface naming

[Wolfgang Walter]

Package:  udev
Version: 240-1
Severity: important

After upgrading from 239-15 to 240-1 or higher my network setup breaks.

The breakage is similar to the last one I reported (bug #904198) though different in detail.

This times all my vlan-devices on a physical device netint are first renamed to renameX and than udev tries to rename them again but this time it tries to give them all the name netint - which of course fails.

A setup like the following one should be able to reproduce this problem:

10-netint.link:
[Match]
MACAddress=00:01:2e:77:a5:45

[Link]
Name=netint
WakeOnLan=off


netint.network:
[Match]
Name=netint

[Network]
VLAN=kbs
LinkLocalAddressing=no
DHCP=no


kbs.link
[NetDev]
Name=kbs
Kind=vlan

[VLAN]
Id=10



In the journal you should see something like

kernel: rename31: renamed from kbs
....
systemd-networkd[852]: kbs: Interface name change detected, kbs has been renamed to rename31
....
[347]: kbs: Failed to rename network interface 31 from 'kbs' to 'netint': Device or resource busy
....



Downgrading udev to 239-15 fixes it in principle that is this rename does not happen.

systemd-networkd from 240-1 though crashes with

	Assertion 'IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURING, LINK_STATE_FAILED, LINK_STATE_LINGER)' failed at ../src/network/network/networkd-link.c:934, function address_handler(). Aborting.

Therefor I also had to downgrade systemd back to 239-15.




Regards,
-- 
Wolfgang Walter
Studentenwerk München
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