apport information ** Tags added: apport-collected oneiric
** Description changed: On linux-image-2.6.38-11-generic and linux-image-3.0.0-10-server, destroying a container causes a kernel OOPS and hang. This is totally repeatable. Procedure to repeat: Use the attached perl program. The perl program: a) sets up a veth device b) forks c) does clone(NS_NEWNET) on the child d) moves one end of the veth device into the child's network namespace e) pings between the parent and the child and runs conntrack -L f) kills the child after a while. [NB: this section used to mention lxc - this is a red herring caused by some surprising semantics of lxc, and in fact is nothing to do with the bug] The oops is in general not possible to catch save via the console as the reboot/hang is immediate. However, I have attached an Oops from a marginally different kernel (2.6.38-10-server on Lucid) which is created in a marginally different way, but has the same call stack. Bug information as required 1. System information. lsb_release -rd gives: Description: Ubuntu 11.04 Release: 11.04 or on another machine showing the same issue $ lsb_release -rd Description: Ubuntu oneiric (development branch) Release: 11.10 2. apt-cache policy linux-image-2.6.38-11-generic linux-image-2.6.38-11-generic: Installed: 2.6.38-11.49 Candidate: 2.6.38-11.49 Version table: *** 2.6.38-11.49 0 500 http://gb.archive.ubuntu.com/ubuntu/ natty-proposed/main amd64 Packages 100 /var/lib/dpkg/status 2.6.38-11.48 0 500 http://gb.archive.ubuntu.com/ubuntu/ natty-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ natty-security/main amd64 Packages or on the second machine: $ apt-cache policy linux-image-3.0.0-10-server linux-image-3.0.0-10-server: Installed: 3.0.0-10.16 Candidate: 3.0.0-10.16 Version table: *** 3.0.0-10.16 0 500 http://gb.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages 100 /var/lib/dpkg/status 3) What I expected to happen: Test program continues to run, showing ICMP traffic moving periodically 4) What actually happened: Kernel hang within 10-20 seconds, Oops on console, data lost - 5) We currently do not believe this to be a security vulnerability as - containers cannot be created as non-root. + 5) We currently do not believe this to be a security vulnerability as containers cannot be created as non-root. + --- + AlsaDevices: + total 0 + crw-rw---- 1 root audio 116, 1 2011-09-10 19:18 seq + crw-rw---- 1 root audio 116, 33 2011-09-10 19:18 timer + AplayDevices: Error: [Errno 2] No such file or directory + ApportVersion: 1.22.1-0ubuntu2 + 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: Error: [Errno 2] No such file or directory + DistroRelease: Ubuntu 11.10 + HibernationDevice: RESUME=UUID=49b12664-6859-4b83-b861-2354c9c23c26 + InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Alpha amd64 (20110301.4) + IwConfig: + lo no wireless extensions. + + eth0 no wireless extensions. + Lsusb: + Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub + Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd + MachineType: Bochs Bochs + Package: linux-lts-backport-natty + PciMultimedia: + + ProcEnviron: + LANG=en_GB.UTF-8 + SHELL=/bin/bash + ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-11-server root=/dev/mapper/hostname-root ro crashkernel=384M-2G:64M,2G-:128M quiet + ProcVersionSignature: Ubuntu 3.0.0-11.17-server 3.0.4 + RelatedPackageVersions: + linux-restricted-modules-3.0.0-11-server N/A + linux-backports-modules-3.0.0-11-server N/A + linux-firmware 1.60 + RfKill: Error: [Errno 2] No such file or directory + Tags: oneiric + Uname: Linux 3.0.0-11-server x86_64 + UpgradeStatus: Upgraded to oneiric on 2011-09-10 (0 days ago) + UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare + dmi.bios.date: 01/01/2007 + dmi.bios.vendor: Bochs + dmi.bios.version: Bochs + dmi.chassis.type: 1 + dmi.chassis.vendor: Bochs + dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr: + dmi.product.name: Bochs + dmi.sys.vendor: Bochs ** Attachment added: "AcpiTables.txt" https://bugs.launchpad.net/bugs/843892/+attachment/2382675/+files/AcpiTables.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/843892 Title: Repeatable kernel oops on container delete To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/843892/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
