Your message dated Sun, 5 Jul 2020 16:43:44 +0200
with message-id 
<cagpfsq1u5lmtqjbm6_5zdq7jhugxucs74-txb92sqyzvphz...@mail.gmail.com>
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has caused the Debian Bug report #922488,
regarding linux-image-4.9.0-8-amd64: Kernel panic in IPv6 stack after some 
hours of operation
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
922488: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=922488
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: linux-image-4.9.0-8-amd64
Version: 4.9.144-3
Severity: critical
Justification: breaks the whole system

Dear Maintainer,

after installing the kernel updates that got released to Debian stable earlier
today or yesterday, we saw all the three updated systems fail in the same way:
after 3-5h, they stop responding. We managed to grab a picture of the kernel
console on one of them, which showed a kernel panic in the IPv6 stack:

  https://imgur.com/7Teb8BV

The topmost stack items are (hoping I got no typos)

  __pskb_pull_tail
  ip6_dst_lookup_tail
  _decode_session6
  __xfrm_decode_session
  icmpv6_route_lookup
  icmp6_send

That system was using the kernel this bug is reported against 
(linux-image-4.9.0-8-amd64 4.9.144-3).
The other two affected systems used a backports kernel instead 
(linux-image-4.19.0-0.bpo.2-amd65 4.19.16-1~bpo9+1).
Unfortunately we have no console access there, all we can do there is a hard 
reboot from the web interface.

These servers are all operating as gateway servers for our Freifunk network, 
meaning they mostly forward traffic and their network setup is very 
non-standard.
Please let me know if there is any configuration details that would be helpful 
to track this down.

Kind regards,
Ralf

--- End Message ---
--- Begin Message ---
Source-Version: 4.9.210-1

Seems fixed by this commit:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v4.9.229&id=f99a93352471791351d67b4f56a7ac891ec1b6aa
which was included in 4.9.193:
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.193
and Debian 4.9.210-1

-- 
ing. Fabio Pedretti
Responsabile U.O.C. "Reti, Sistemi e Sicurezza Informatica"
https://www.unibs.it/node/4305
Università degli Studi di Brescia
Via Valotti, 9 - 25121 Brescia
E-mail: fabio.pedre...@unibs.it

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