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Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration

Cross-posted to 2 groups.

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Hi Garri,

On Sat, Oct 18, 2025 at 01:39:02AM -0700, Stephen Hemminger wrote:
> On Thu, 16 Oct 2025 00:12:40 +0200
> Garri Djavadyan <g.djavadyan@gmail.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.

Garri, best action would likely be to really post your full report on
netdev directly.

Regards,
Salvatore

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Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration Garri Djavadyan <g.djavadyan@gmail.com> - 2025-10-13 00:00 +0200
  Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration Salvatore Bonaccorso <carnil@debian.org> - 2025-10-13 08:30 +0200
  Processed: Re: Bug#1117959: ipv6_route flags RTF_ADDRCONF and  RTF_PREFIX_RT are not cleared when static on-link routes are added during  IPv6 address configuration "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-10-13 08:30 +0200
  Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration Garri Djavadyan <g.djavadyan@gmail.com> - 2025-10-16 00:20 +0200
    Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration Stephen Hemminger <stephen@networkplumber.org> - 2025-10-18 03:10 +0200
      Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration Salvatore Bonaccorso <carnil@debian.org> - 2025-10-25 17:00 +0200
  Bug#1117959: ipv6_route flags RTF_ADDRCONF and RTF_PREFIX_RT are not cleared when static on-link routes are added during IPv6 address configuration Salvatore Bonaccorso <carnil@debian.org> - 2025-11-21 12:10 +0100
  Bug#1117959: marked as done (ipv6_route flags RTF_ADDRCONF and  RTF_PREFIX_RT are not cleared when static on-link routes are added during  IPv6 address configuration) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-12-15 21:20 +0100

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