Bug#922488: linux-image-4.9.0-8-amd64: Kernel panic in IPv6 stack after some hours of operation
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
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