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
