OK, this looks like a known v4.8 stable regression, caused by the
backport of commit 5d41ce29e3b9 ("net: icmp6_send should use dst dev to
determine L3 domain") introduced in v4.8.10.
Should be fixed by commit 79dc7e3f1cd3 ("net: handle no dst on skb in
icmp6_send") as soon as Debian moves to v4.9
The first crash dumps were from my console, which was overwritten by
the later boot process and therefore incomplete. Should have dug up
the complete logs from the console server in the first place..
Anyways, here are the complete stack traces:
[509753.194825] ixgbe :02:00.0 uplink: NIC
Package: src:linux
Version: 4.8.11-1
Severity: important
File: /boot/vmlinuz-4.8.0-2-amd64
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Dear Maintainer,
I just had two crashes in a row in icmp6_send while rebooting a switch in
the other end of one of the br0 bridge ports. Both crash dumps
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