** Also affects: linux
Importance: Undecided
Status: New
** No longer affects: linux
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https://bugs.launchpad.net/bugs/1842447
Title:
Kernel Panic with linux-image-4.15.0-60-generic when specifying
nameserver in docker-compose
Status in linux package in Ubuntu:
Confirmed
Bug description:
Hello,
there are multiple inquries in the mailcow GitHub issues over at
https://github.com/mailcow/mailcow-dockerized/issues/2904 that the
latest kernel linux-image-4.15.0-60-generic causes kernel panics when
"- dns" setting is used within the docker-compose.yml file, for yet
some unclear reasons.
Multiple users on different systems (e.g. virtualized ones on VMware
ESXi and KVM) were able to reproduce the same issue. I was also able
to reproduce this constantly on a completely new deployed Ubuntu 18.04
VM (KVM) with a fresh mailcow installation.
Steps to reproduce:
1. Install a clean Ubuntu 18.04(.03) machine
2. Upgrade the installation to linux-image-4.15.0-60-generic
3. Setup mailcow as instructed at
https://mailcow.github.io/mailcow-dockerized-docs/i_u_m_install/ (just takes
less than a minute, easy to reproduce)
4. Start mailcow with "dns"-settings specified in docker-compose file (Make
sure using the older docker-compose version with dns settings:
https://raw.githubusercontent.com/mailcow/mailcow-dockerized/a1403b7a5969637df23001d05c59c2a20774fbb5/docker-compose.yml)
5. Wait a few minutes, then kernel crash appears
Using this workaround it appears to be stable again:
https://github.com/mailcow/mailcow-
dockerized/commit/dc6eea5142c063e26408a685b66fbb7754408ec2
I've attached the apport file to this bug. Please let me know if you
need any kind of further information. (As this is my first bug report
here, I hope I have included all required information helping you
finding the cause.)
Kind regards,
Patrik
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