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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1729637
Title:
Samba mount/umount in docker container triggers kernel Oops
Status in linux package in Ubuntu:
Incomplete
Bug description:
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/
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