netdev - Re: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration

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Message-ID: <20251018013902.67802981@phoenix.lan>
Date: Sat, 18 Oct 2025 01:39:02 -0700
From: Stephen Hemminger <stephen@...workplumber.org>
To: Garri Djavadyan <g.djavadyan@...il.com>
Cc: netdev@...r.kernel.org, 1117959@...s.debian.org
Subject: Re: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared
 when static on-link routes are added during IPv6 address configuration

On Thu, 16 Oct 2025 00:12:40 +0200
Garri Djavadyan <g.djavadyan@...il.com> wrote:

> Hi Everyone,
> 
> A year ago I noticed a problem with handling ipv6_route flags that in
> some scenarios can lead to reachability issues. It was reported here:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=219205
> 
> 
> Also it was recently reported in the Debian tracker after checking if
> the latest Debian stable is still affected:
> 
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1117959
> 
> 
> Unfortunately, the Debian team cannot act on the report because no one
> from the upstream kernel team has confirmed if the report in the
> upstream tracker is valid or not. Therefore, I am checking if anyone
> can help confirm if the observed behavior is indeed a bug.
> 
> Many thanks in advance!
> 
> Regards,
> Garri
> 

Linux networking does not actively use kernel bugzilla.
I forward the reports to the mailing list, that is all.
After than sometimes developers go back and update bugzilla
but it is not required or expected.