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[Bug 1410852] Re: restarting container with a vlan interface results in kernel stack trace

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This bug was fixed in the package linux - 3.13.0-49.81

---------------
linux (3.13.0-49.81) trusty; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1436016

  [ Alex Hung ]

  * SAUCE: ACPI / blacklist: blacklist Win8 OSI for HP Pavilion dv6
    - LP: #1416940

  [ Andy Whitcroft ]

  * [Packaging] generate live watchdog blacklists
    - LP: #1432837

  [ Ben Widawsky ]

  * SAUCE: i915_bdw: drm/i915/bdw: enable eDRAM.
    - LP: #1430855

  [ Chris J Arges ]

  * [Config] Add ibmvfc to d-i
    - LP: #1416001

  [ Seth Forshee ]

  * [Config] updateconfigs - enable X86_UP_APIC_MSI

  [ Upstream Kernel Changes ]

  * net: add sysfs helpers for netdev_adjacent logic
    - LP: #1410852
  * net: Mark functions as static in core/dev.c
    - LP: #1410852
  * net: rename sysfs symlinks on device name change
    - LP: #1410852
  * btrfs: fix null pointer dereference in clone_fs_devices when name is
    null
    - LP: #1429804
  * cdc-acm: add sanity checks
    - LP: #1413992
  * x86: thinkpad_acpi.c: fixed spacing coding style issue
    - LP: #1417915
  * thinkpad_acpi: support new BIOS version string pattern
    - LP: #1417915
  * net: sctp: fix slab corruption from use after free on INIT collisions
    - LP: #1416506
    - CVE-2015-1421
  * ipv4: try to cache dst_entries which would cause a redirect
    - LP: #1420027
    - CVE-2015-1465
  * x86, mm/ASLR: Fix stack randomization on 64-bit systems
    - LP: #1423757
    - CVE-2015-1593
  * net: llc: use correct size for sysctl timeout entries
    - LP: #1425271
    - CVE-2015-2041
  * net: rds: use correct size for max unacked packets and bytes
    - LP: #1425274
    - CVE-2015-2042
  * Btrfs: clear compress-force when remounting with compress option
    - LP: #1434183
  * ext4: merge uninitialized extents
    - LP: #1430184
  * btrfs: filter invalid arg for btrfs resize
    - LP: #1435441
  * Bluetooth: Add firmware update for Atheros 0cf3:311f
  * Bluetooth: btusb: Add IMC Networks (Broadcom based)
  * Bluetooth: sort the list of IDs in the source code
  * Bluetooth: append new supported device to the list [0b05:17d0]
  * Bluetooth: Add support for Intel bootloader devices
  * Bluetooth: Ignore isochronous endpoints for Intel USB bootloader
  * Bluetooth: Add support for Acer [13D3:3432]
  * Bluetooth: Add support for Broadcom device of Asus Z97-DELUXE
    motherboard
  * Add a new PID/VID 0227/0930 for AR3012.
  * Bluetooth: Add support for Acer [0489:e078]
  * Bluetooth: Add USB device 04ca:3010 as Atheros AR3012
  * x86: mm: move mmap_sem unlock from mm_fault_error() to caller
  * vm: add VM_FAULT_SIGSEGV handling support
  * vm: make stack guard page errors return VM_FAULT_SIGSEGV rather than
    SIGBUS
  * spi/pxa2xx: Clear cur_chip pointer before starting next message
  * spi: dw: Fix detecting FIFO depth
  * spi: dw-mid: fix FIFO size
  * ASoC: wm8960: Fix capture sample rate from 11250 to 11025
  * regulator: core: fix race condition in regulator_put()
  * ASoC: omap-mcbsp: Correct CBM_CFS dai format configuration
  * can: c_can: end pending transmission on network stop (ifdown)
  * nfs: fix dio deadlock when O_DIRECT flag is flipped
  * NFSv4.1: Fix an Oops in nfs41_walk_client_list
  * Input: i8042 - add noloop quirk for Medion Akoya E7225 (MD98857)
  * mac80211: properly set CCK flag in radiotap
  * nl80211: fix per-station group key get/del and memory leak
  * i2c: s3c2410: fix ABBA deadlock by keeping clock prepared
  * usb-storage/SCSI: blacklist FUA on JMicron 152d:2566 USB-SATA
    controller
  * drm/i915: Only fence tiled region of object.
  * drm/i915: Fix and clean BDW PCH identification
  * drm/i915: BDW Fix Halo PCI IDs marked as ULT.
  * ALSA: seq-dummy: remove deadlock-causing events on close
  * drivers/rtc/rtc-s5m.c: terminate s5m_rtc_id array with empty element
  * drivers: net: cpsw: discard dual emac default vlan configuration
  * can: kvaser_usb: Do not sleep in atomic context
  * can: kvaser_usb: Send correct context to URB completion
  * can: kvaser_usb: Retry the first bulk transfer on -ETIMEDOUT
  * can: kvaser_usb: Fix state handling upon BUS_ERROR events
  * quota: Switch ->get_dqblk() and ->set_dqblk() to use bytes as space
    units
  * rbd: fix rbd_dev_parent_get() when parent_overlap == 0
  * rbd: drop parent_ref in rbd_dev_unprobe() unconditionally
  * dm cache: fix missing ERR_PTR returns and handling
  * dm thin: don't allow messages to be sent to a pool target in READ_ONLY
    or FAIL mode
  * net: cls_bpf: fix size mismatch on filter preparation
  * net: cls_bpf: fix auto generation of per list handles
  * ipv6: replacing a rt6_info needs to purge possible propagated rt6_infos
    too
  * perf: Tighten (and fix) the grouping condition
  * arc: mm: Fix build failure
  * MIPS: IRQ: Fix disable_irq on CPU IRQs
  * Complete oplock break jobs before closing file handle
  * smpboot: Add missing get_online_cpus() in
    smpboot_register_percpu_thread()
  * ASoC: atmel_ssc_dai: fix start event for I2S mode
  * spi: fsl-dspi: Fix memory leak
  * spi: spi-fsl-dspi: Remove usage of devm_kzalloc
  * ALSA: ak411x: Fix stall in work callback
  * lib/checksum.c: fix carry in csum_tcpudp_nofold
  * MIPS: Fix kernel lockup or crash after CPU offline/online
  * gpio: sysfs: fix memory leak in gpiod_export_link
  * gpio: sysfs: fix memory leak in gpiod_sysfs_set_active_low
  * PCI: Add NEC variants to Stratus ftServer PCIe DMI check
  * ASoC: sgtl5000: add delay before first I2C access
  * PCI: Handle read-only BARs on AMD CS553x devices
  * mm: pagewalk: call pte_hole() for VM_PFNMAP during walk_page_range
  * nilfs2: fix deadlock of segment constructor over I_SYNC flag
  * tcp: ipv4: initialize unicast_sock sk_pacing_rate
  * caif: remove wrong dev_net_set() call
  * qlge: Fix qlge_update_hw_vlan_features to handle if interface is down
  * ip6_gre: fix endianness errors in ip6gre_err
  * spi: dw: revisit FIFO size detection again
  * Linux 3.13.11-ckt17
 -- Kamal Mostafa <kamal@xxxxxxxxxxxxx>   Tue, 24 Mar 2015 11:58:44 -0700

-- 
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/1410852

Title:
  restarting container with a vlan interface results in kernel stack
  trace

Status in lxc containers:
  Invalid
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Trusty:
  Fix Released

Bug description:
  [Impact]
  Users of VLANs with LXC containers will see kernel BUGs when starting and stopping containers.

  [Test Case]
  - In trusty, install lxc and vlan.
  - Edit /etc/lxc/default.conf as follows:
      lxc.network.type=vlan 
      lxc.network.vlan.id=10
      lxc.network.flags=up
      lxc.network.link=eth0
      lxc.aa_profile = unconfined
  - Setup LXC container
      sudo lxc-create -t download -n u1 -- --dist ubuntu --release trusty --arch amd64
  - Run the following until you see the failure:
      lxc-start --name u1 -d
      lxc-stop --name u1

  [Fix]
  commit 5bb025fae53889cc99a21058c5dd369bf8cce820
  support patches:
  commit 0a59f3a9fd7e2801a445682465ea0522ea497183
  commit 3ee32707560955e92d30f7f6e5138cb92a3b1a7e

  --

  Stopping a container and starting it again results in kernel stack
  trace with a vlan interface.

  ---8<---
  lxc.network.type = vlan
  lxc.network.flags = up
  lxc.network.link = p3p1
  lxc.network.vlan.id = 2
  ---8<---

  dpkg -l | grep lxc
  ii  liblxc1                             1.0.6-0ubuntu0.1                    amd64        Linux Containers userspace tools (library)
  ii  lxc                                 1.0.6-0ubuntu0.1                    amd64        Linux Containers userspace tools
  ii  lxc-templates                       1.0.6-0ubuntu0.1                    amd64        Linux Containers userspace tools (templates)
  ii  python3-lxc                         1.0.6-0ubuntu0.1                    amd64        Linux Containers userspace tools (Python 3.x bindings)

  cat /proc/cmdline
  BOOT_IMAGE=/boot/vmlinuz-3.13.0-44-generic root=UUID=6d1fc9aa-735c-4e61-ae1c-0a9d2587e77b ro acpi_osi=Linux acpi=force acpi_enforce_resources=lax i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.semaphores=1

  Snipplet from stack trace:
  ---8<---
  [35188.374621] WARNING: CPU: 4 PID: 3933 at /build/buildd/linux-3.13.0/fs/sysfs/dir.c:486 sysfs_warn_dup+0x86/0xa0()
  [35188.374623] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:1c.3/0000:02:00.0/net/p3p1/upper_vlan2'
  ---8<---

  Is deconfiguration on stop of an lxc instance not working anymore?

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