It's possible this same issue is responsible for this crash in WireGuard: https://lists.zx2c4.com/pipermail/wireguard/2019-September/004495.html
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 Status in linux source package in Bionic: Fix Committed Bug description: [Impact] Some fragmentation+NAT workloads will cause kernel BUG/Ooops. [Test case] sudo iptables -t nat -I POSTROUTING -j MASQUERADE sudo hping3 192.168.122.1 -s 1000 -p 2000 -d 60000 [Regression potential] This could make fragmented packets stop flowing. So, make sure fragmented pings still work. ping 192.168.122.1 -s 60000 still works, even with the above nat rule. -------------------------------------------- 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1842447/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
