Bug#969599: systemd: Valid IPv6 addresses and routes discarded erroneously under certain conditions.

[Michael Biebl]

Am 05.09.20 um 21:31 schrieb Colm Buckley:
> Package: systemd
> Version: 246.4-1~bpo10+1
> Severity: important
> Tags: ipv6
> 
> Dear Maintainer,                                                                                                                                                                                                                  
>                                                                                                                                                                                                                                   
> The current BPO release of systemd includes a serious regression; valid SLAAC v6 addresses and routes                                                                                                                             
> are discarded under certain circumstances. I believe this to be an instance of                                                                                                                                                    
> https://github.com/systemd/systemd/issues/16719 which is possibly fixed by https://github.com/systemd/systemd/pull/16725                                                                                                          
>                                                                                                                                                                                                                                   
> The user-visible symptom is that the systems stop responding on their SLAAC-configured v6 addresses until the link                                                                                                                
> is next reconfigured; some time later they drop these addresses again.                                                                                                                                                            
>                                                                                                                                                                                                                                   
> An extract from the debug log from systemd-networkd follows: note in particular the "Removing address" and "Forgetting address"                                                                                                   
> lines in the log.                                                                                                                                                                                                                 
>                                                                                                                                                                                                                                   
> I think that pull/16725 should be cherry-picked into Debian as soon as possible.                                                                                                                                                  

Thanks for the bug report.
Could you test the pull request and verify that this fixes your issue
(and ideally also report back to the upstream bug report).
Once the PR is merged upstream, we can consider cherry-picking it.

Michael

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