Bug#1071184: Kernel 6.6 and 6.7 route-leak between VRF and default leads to Time to live exceeded

From	Diederik de Haas <didi.debian@cknow.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1071184: Kernel 6.6 and 6.7 route-leak between VRF and default leads to Time to live exceeded
Date	2024-05-17 15:40 +0200
Message-ID	<IF5Yt-dY2E-9@gated-at.bofh.it> (permalink)
References	<IF5vr-dXTo-7@gated-at.bofh.it> <IF5F8-dXWD-1@gated-at.bofh.it> <IEnE5-dxbb-9@gated-at.bofh.it> <IF5F8-dXWD-1@gated-at.bofh.it>
Organization	Connecting Knowledge

Cross-posted to 2 groups.

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On Friday, 17 May 2024 15:08:17 CEST Development EasyNet wrote:
> I will try. Meanwhile I was troubleshooting this issue for some time and
> I notice a change in FRRouting between 9.1 and 10.0.
> Before 10.0 FRRouting was installing the routes in kernel using the
> destination interface of the route. Starting from 10.0 FRRouting is
> installing all routes towards the VRF interface.
> 
> Here is my bug reported on FRRouting:
> https://github.com/FRRouting/frr/issues/15909

I have no (particular) knowledge about kernel routing or FRRouting, so I can't 
help with that aspect. But if the problem is resolved with 6.8.9, then that 
seems the easiest solution and means the underlying issue is fixed.
If not, it's useful to know if there is a(n older) kernel version where it 
does work.

But given there's also a FRR 9.x -> 10.x upgrade at play, I'm not so sure the 
problem is actually in the kernel.

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Bug#1071184: Kernel 6.6 and 6.7 route-leak between VRF and default leads to Time to live exceeded Diederik de Haas <didi.debian@cknow.org> - 2024-05-17 15:10 +0200
  Processed: Re: Kernel 6.6 and 6.7 route-leak between VRF and  default leads to Time to live exceeded "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-05-17 15:10 +0200
  Bug#1071184: Kernel 6.6 and 6.7 route-leak between VRF and default leads to Time to live exceeded Development EasyNet <devel@easynet.dev> - 2024-05-17 15:20 +0200
    Bug#1071184: Kernel 6.6 and 6.7 route-leak between VRF and default leads to Time to live exceeded Diederik de Haas <didi.debian@cknow.org> - 2024-05-17 15:40 +0200

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