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[Bug 1310586] Re: Multicast snooping on bridge breaks ICMP6 neighbor solicitation for KVM guests

 

Unfortunately I wont be able to test the mainline kernel any time soon.
However, I see that the relevant patches described in the netdev thread
are merged into the 3.13 tree:

bridge: multicast: add sanity check for query source addresses
bridge: multicast: add sanity check for general query destination
bridge: multicast: enable snooping on general queries only

Including these patches in the Ubuntu 14.04 kernel should resolve this
issue.

** Tags added: kernel-unable-to-test-upstream

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https://bugs.launchpad.net/bugs/1310586

Title:
  Multicast snooping on bridge breaks ICMP6 neighbor solicitation for
  KVM guests

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu 3.13.0-24.46-generic 3.13.9 seems to be affected by the same
  bug as described here: http://patchwork.ozlabs.org/patch/326048/

  The suggested workaround (echo 0 > /sys/class/net/br0/bridge/multicast_snooping) solves IPv6-problems for KVM guests.
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Apr 20 15:03 seq
   crw-rw---- 1 root audio 116, 33 Apr 20 15:03 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.14.1-0ubuntu3
  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 14.04
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb:
   Bus 001 Device 002: ID 12d1:1001 Huawei Technologies Co., Ltd. E169/E620/E800 HSDPA Modem
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Supermicro X7DBN
  Package: linux (not installed)
  PciMultimedia:
   
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=/dev/mapper/ssd-root ro bootdegraded=true apparmor=0 panic=10 console=tty0 console=ttyS1,115200 nomdmonddf nomdmonisw nomdmonddf nomdmonisw
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  trusty
  Uname: Linux 3.13.0-24-generic x86_64
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (2 days ago)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 07/04/2011
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 2.1c
  dmi.board.name: X7DBN
  dmi.board.vendor: Supermicro
  dmi.board.version: PCB Version
  dmi.chassis.type: 1
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 0123456789
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr2.1c:bd07/04/2011:svnSupermicro:pnX7DBN:pvr0123456789:rvnSupermicro:rnX7DBN:rvrPCBVersion:cvnSupermicro:ct1:cvr0123456789:
  dmi.product.name: X7DBN
  dmi.product.version: 0123456789
  dmi.sys.vendor: Supermicro

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