This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- xenial' to 'verification-done-xenial'. If the problem still exists, change the tag 'verification-needed-xenial' to 'verification-failed- xenial'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-xenial ** Tags added: verification-needed-zesty -- 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/1729637 Title: Samba mount/umount in docker container triggers kernel Oops Status in linux package in Ubuntu: In Progress Status in linux source package in Xenial: Fix Committed Status in linux source package in Zesty: Fix Committed Bug description: == SRU Justification == This bug causes Samba mount and umounts in docker container to trigger a kernel Oops. 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. This bug happens in Xenial and Zesty, and is fixed by the following two commits: 76da0704507b ("ipv6: only call ip6_route_dev_notify() once for NETDEV_UNREGISTER") 12d94a804946 ("ipv6: fix NULL dereference in ip6_route_dev_notify()") Both commits are clean cherry picks. 76da0704507b is in mainline as of v4.12. Commit 12d94a804946 is in mainline as of v4.13-rc6. == Fixes == commit 76da0704507bbc51875013f6557877ab308cfd0a Author: WANG Cong <xiyou.wangcong at gmail.com> Date: Tue Jun 20 11:42:27 2017 -0700 ipv6: only call ip6_route_dev_notify() once for NETDEV_UNREGISTER commit 12d94a804946af291e24b80fc53ec86264765781 Author: Eric Dumazet <edumazet at google.com> Date: Tue Aug 15 04:09:51 2017 -0700 ipv6: fix NULL dereference in ip6_route_dev_notify() == Regression Potential == Both commits are specific to ipv6 and fix a regression introduced into Xenial and Zesty. == Test Case == A test kernel was built with these patches and tested by the original bug reporter. The bug reporter states the test kernel resolved the bug. 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/ --- AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Nov 3 09:51 seq crw-rw---- 1 root audio 116, 33 Nov 3 09:51 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.20.1-0ubuntu2.10 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: N/A DistroRelease: Ubuntu 16.04 IwConfig: Error: [Errno 2] No such file or directory Lsusb: Error: command ['lsusb'] failed with exit code 1: MachineType: Google Google Compute Engine Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=rxvt-unicode-256color PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-37-generic root=UUID=bf9a017a-931d-4191-84bc-b8434dbba527 ro scsi_mod.use_blk_mq=Y console=ttyS0 ProcVersionSignature: Ubuntu 4.10.0-37.41~16.04.1-generic 4.10.17 RelatedPackageVersions: linux-restricted-modules-4.10.0-37-generic N/A linux-backports-modules-4.10.0-37-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory Tags: xenial uec-images xenial uec-images Uname: Linux 4.10.0-37-generic x86_64 UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: _MarkForUpload: False dmi.bios.date: 01/01/2011 dmi.bios.vendor: Google dmi.bios.version: Google dmi.board.asset.tag: A3DDBB61-646B-C60C-3999-1F1D7B7A334A dmi.board.name: Google Compute Engine dmi.board.vendor: Google dmi.chassis.type: 1 dmi.chassis.vendor: Google dmi.modalias: dmi:bvnGoogle:bvrGoogle:bd01/01/2011:svnGoogle:pnGoogleComputeEngine:pvr:rvnGoogle:rnGoogleComputeEngine:rvr:cvnGoogle:ct1:cvr: dmi.product.name: Google Compute Engine dmi.sys.vendor: Google To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1729637/+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
