Public bug reported: When running 2 docker containers, one as samba server and another one as samba client that mounts and umounts a smb share a kernel OOps can be triggered on multiple kernels.
The kernel message: unregister_netdevice: waiting for lo to become free. Usage count = 1 shows up, some minutes later the oops and/or warnings happens. The scripts to trigger the kernel Oops can be found at: https://github.com/fho/docker-samba-loop I was able to reproduce kernel Oopses on a clean Ubuntu 16.0.4 installation with: - linux-image-4.4.0-93-generic=4.4.0-93.116~14.04.1 - linux-image-4.10.0-32-generic=4.10.0-32.36~16.04.1 - linux-image-4.11.0-14-generic=4.11.0-14.20~16.04.1 In a different scenario were Ubuntu 16.04 servers were running multiple docker containers with Nginx or small network applications in parallel, I was also able to reproduce the kernel Oopses also on: - linux-image-4.10.0-1004-gcp - linux-image-4.12.10-041210-generic=4.12.10-041210.20170830 I haven't tried again to reproduce it with those kernels on a clean Ubuntu installation and unfortunately didn't kept the kernel logs. The "unregister_netdevice: waiting for lo to become free. Usage count = 1" messages are related to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1711407 which is handled as separate issue. According to https://github.com/moby/moby/issues/35068 the crash is fixed by: https://patchwork.ozlabs.org/patch/801533/ https://patchwork.ozlabs.org/patch/778449/ ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1729637 Title: Samba mount/umount in docker container triggers kernel Oops To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1729637/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
