Unfortunately, links browser does not present me with a "Log in" button
during apport-collect authorization, therefore I cannot add the details
to this bug. Therefore changing the status of the bug to 'Confirmed' as
suggested.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: apport-collected
** Description changed:
Dear all,
a regression has been introduced in Linux Kernels by patch
https://github.com/torvalds/linux/commit/efe4208f47f907
The regression behaves in a way that when there are multiple IPv6
sockets created with multicast/link-local addresses on the same
interface, handling of the packets is broken. (Reported e. g. on
http://www.spinics.net/lists/netdev/msg286344.html)
This can be reproduced by
1. installing Ubuntu 14.04 with default kernel
2. installing dibbler-server and configuring with basic dhcpv6 settings (hand
out one subnet), for example:
/etc/dibbler/server.conf:
log-level 8
preference 0
iface <IFACE> {
t1 1800-2000
t2 2700-3000
prefered-lifetime 3600
valid-lifetime 7200
subnet 2001:db8:abcd::/64
class {
pool 2001:db8:abcd::1000-2001:db8:abcd::1fff
}
ta-class {
pool 2001:db8:abcd::2000-2001:db8:abcd::2fff
}
option dns-server 2001:db8:abcd::1
}
3. get a DHCPv6 client and request addresses from the server
4. view the packets on the interface affected, use e.g.: tcpdump -i <IFACE>
'(udp port 546)||(udp port 547)' -n
There will be multicast DHCPv6 solicits, however no DHCPv6 responses, as
Dibbler creates two sockets on the same interface (multicast socket first,
link-local socket next).
There is a patch available in the upstream, that will be probably merged
to 3.15.2 kernel (it is not present in current 3.15.1 vanilla kernel) -
http://patchwork.ozlabs.org/patch/352246/
When applying this patch to trusty-proposed linux-
image-3.13.0-30-generic_3.13.0-30.54 from Git repositories at git clone
git://kernel.ubuntu.com/ubuntu/ubuntu-trusty.git and recompiling the
kernel, everything starts to work as expected.
- Please apply this patch ASAP to fix IPv6 multicast, there is more and
- more IPv6 in the wild and this bug is a serious one.
+ Please apply this patch ASAP to fix IPv6 multicast, there is more and more
IPv6 in the wild and this bug is a serious one.
+ ---
+ ApportVersion: 2.14.1-0ubuntu3.2
+ Architecture: amd64
+ AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
+ DistroRelease: Ubuntu 14.04
+ InstallationDate: Installed on 2012-04-24 (786 days ago)
+ InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Beta amd64
(20120327)
+ MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M.
+ Package: linux (not installed)
+ ProcFB: 0 inteldrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=/dev/md1
ro nosplash nosplash nomdmonddf nomdmonisw
+ ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
+ PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
+ RelatedPackageVersions:
+ linux-restricted-modules-3.13.0-30-generic N/A
+ linux-backports-modules-3.13.0-30-generic N/A
+ linux-firmware 1.127.2
+ RfKill:
+ 0: hci0: Bluetooth
+ Soft blocked: no
+ Hard blocked: no
+ Tags: trusty
+ Uname: Linux 3.13.0-30-generic x86_64
+ UpgradeStatus: Upgraded to trusty on 2014-04-24 (56 days ago)
+ UserGroups:
+
+ _MarkForUpload: True
+ dmi.bios.date: 08/23/2012
+ dmi.bios.vendor: American Megatrends Inc.
+ dmi.bios.version: F2
+ dmi.board.asset.tag: To be filled by O.E.M.
+ dmi.board.name: H77N-WIFI
+ dmi.board.vendor: Gigabyte Technology Co., Ltd.
+ dmi.board.version: x.x
+ dmi.chassis.asset.tag: To Be Filled By O.E.M.
+ dmi.chassis.type: 3
+ dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
+ dmi.chassis.version: To Be Filled By O.E.M.
+ dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrF2:bd08/23/2012:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnH77N-WIFI:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
+ dmi.product.name: To be filled by O.E.M.
+ dmi.product.version: To be filled by O.E.M.
+ dmi.sys.vendor: Gigabyte Technology Co., Ltd.
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https://bugs.launchpad.net/bugs/1332420
Title:
IPv6 multicast broken in kernel
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