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Groups > linux.debian.kernel > #92222

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)

Cross-posted to 2 groups.

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Hi,

Thanks for your report.

On Fri, May 01, 2026 at 09:24:43PM -0400, podorski wrote:
> Source: linux
> Version: Regression introduced in 6.1.170-1 / 6.1.0-45-amd64
> Severity: important
> 
> Dear Maintainer,
> 
> *** Reporter, please consider answering these questions, where appropriate ***
> 
>    * What led up to the situation?
> updating kernel via apt on 20260501
> 
> any ping from my host to a "down" host on my lan causes these messages to pile up in the ring buffer

This looks to be a consequence of/related to the backport of
81b84de32bb2 ("xfrm: fix ip_rt_bug race in icmp_route_lookup reverse
path") which landed in 6.1.165 upstream and thus included as well in
the recent bookworm-security update.

The change is net_warn_ratelimited() but it is not immediately clear
to me yet why this triggers on a bookworm kernel, whereas it does not
with on a trixie host with 6.12.85-1.

We will have a look.

Regards,
Salvatore

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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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