Bug#1135514: [6.1.y regresssion] 9a95ec9144ee ("xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path") causes log spam on ping to unreachable host

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From	Salvatore Bonaccorso <carnil@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1135514: [6.1.y regresssion] 9a95ec9144ee ("xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path") causes log spam on ping to unreachable host
Date	Wed, 06 May 2026 14:10:01 +0200
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X-Original-Cc	Paolo Abeni <pabeni@redhat.com>, Sasha Levin <sashal@kernel.org>, regressions@lists.linux.dev, stable@vger.kernel.org, podorski <podorski@gmail.com>, Brad Barnett <debian-bugs5@l8r.net>, "David S. Miller" <davem@davemloft.net>, David Ahern <dsahern@kernel.org>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Simon Horman <horms@kernel.org>
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Hi Jiayuan,

On Wed, May 06, 2026 at 05:47:52PM +0800, Jiayuan Chen wrote:
> On Wed, May 6, 2026 at 5:39 PM Salvatore Bonaccorso <carnil@debian.org> wrote:
> >
> > Hi Jiayuan,
> >
> > On Wed, May 06, 2026 at 09:04:24AM +0800, Jiayuan Chen wrote:
> > > I think it because we failed to backport  this patch before:
> > > https://lore.kernel.org/stable/20250207161555-b1a8749027831a1a@stable.kernel.org/T/#m0c880c1f04f7211aea9b7f6b4de0b64aa1726417
> >
> > Which won't apply cleanly, I assume this was the reason it got not
> > backported to 6.1.y. Do you have a backport of that, or should the
> > original commit introducing the issue be reverted from 6.1.y?
> >
> > Regards,
> > Salvtore
> 
> I tried to backport this patch to stable. Hope these patches apply successfully.
> 
> https://lore.kernel.org/stable/20260506012057.285743-1-jiayuan.chen@linux.dev/T/#u
> https://lore.kernel.org/stable/20260506012115.286204-1-jiayuan.chen@linux.dev/T/#u

I tried the patch on top of 6.1.170 and this resolves the issue. I
added the Tested-by to your patch submission.

Thank you.

Regards,
Salvatore

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Thread

Bug#1135514: icmp: detected local route for xx during ICMP sending (6.1.170-1 / 6.1.0-45-amd64, silent on 6.1.164-1 / 6.1.0-44-amd64) podorski <podorski@gmail.com> - 2026-05-02 03:30 +0200
  Bug#1135514: icmp: detected local route for xx during ICMP sending (6.1.170-1 / 6.1.0-45-amd64, silent on 6.1.164-1 / 6.1.0-44-amd64) Salvatore Bonaccorso <carnil@debian.org> - 2026-05-02 08:20 +0200
    Bug#1135514: icmp: detected local route for xx during ICMP sending (6.1.170-1 / 6.1.0-45-amd64, silent on 6.1.164-1 / 6.1.0-44-amd64) Salvatore Bonaccorso <carnil@debian.org> - 2026-05-02 11:00 +0200
  Processed: [6.1.y regresssion] 9a95ec9144ee ("xfrm: fix ip_rt_bug  race in icmp_route_lookup reverse path") causes log spam on ping to  unreachable host "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-02 11:30 +0200
  Bug#1135514: [6.1.y regresssion] 9a95ec9144ee ("xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path") causes log spam on ping to unreachable host Salvatore Bonaccorso <carnil@debian.org> - 2026-05-06 11:50 +0200
  Bug#1135514: [6.1.y regresssion] 9a95ec9144ee ("xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path") causes log spam on ping to unreachable host Salvatore Bonaccorso <carnil@debian.org> - 2026-05-06 14:10 +0200
  Bug#1135514: marked as done (icmp: detected local route for xx  during ICMP sending (6.1.170-1 / 6.1.0-45-amd64, silent on 6.1.164-1 /  6.1.0-44-amd64)) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-10 20:40 +0200

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