| 2017-04-19 01:56:54 |
Jorge Niedbalski |
bug |
|
|
added bug |
| 2017-04-19 01:58:15 |
Jorge Niedbalski |
nominated for series |
|
Ubuntu Zesty |
|
| 2017-04-19 01:58:15 |
Jorge Niedbalski |
nominated for series |
|
Ubuntu Yakkety |
|
| 2017-04-19 02:00:10 |
Brad Figg |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2017-04-19 02:01:30 |
Jorge Niedbalski |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2017-04-19 14:08:35 |
Joseph Salisbury |
bug task added |
|
linux (Ubuntu Yakkety) |
|
| 2017-04-19 14:08:43 |
Joseph Salisbury |
bug task added |
|
linux (Ubuntu Zesty) |
|
| 2017-04-19 14:08:50 |
Joseph Salisbury |
linux (Ubuntu Yakkety): status |
New |
Triaged |
|
| 2017-04-19 14:08:54 |
Joseph Salisbury |
linux (Ubuntu Zesty): status |
Confirmed |
Triaged |
|
| 2017-04-19 14:08:57 |
Joseph Salisbury |
linux (Ubuntu Yakkety): importance |
Undecided |
Medium |
|
| 2017-04-19 14:09:00 |
Joseph Salisbury |
linux (Ubuntu Zesty): importance |
Undecided |
Medium |
|
| 2017-04-19 14:09:24 |
Joseph Salisbury |
tags |
|
kernel-da-key yakkety zesty |
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| 2017-04-20 16:04:32 |
Joseph Salisbury |
tags |
kernel-da-key yakkety zesty |
yakkety zesty |
|
| 2017-04-20 20:06:37 |
Jorge Niedbalski |
tags |
yakkety zesty |
sts yakkety zesty |
|
| 2017-04-20 20:06:43 |
Jorge Niedbalski |
description |
[Environment]
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
# uname -a
Linux juju-niedbalski-xenial-machine-12 4.8.0-46-generic #49~16.04.1-Ubuntu SMP Fri Mar 31 14:51:03 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[Description]
When we send a packet for our own local address on a non-loopback
interface (e.g. eth0), due to the change had been introduced from
commit 0b922b7 ("net: original ingress device index in PKTINFO"), the
original ingress device index would be set as the loopback interface.
[Fix]
* https://github.com/torvalds/linux/commit/f0c16ba8933ed217c2688b277410b2a37ba81591 |
[Environment]
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial
# uname -a
Linux juju-niedbalski-xenial-machine-12 4.8.0-46-generic #49~16.04.1-Ubuntu SMP Fri Mar 31 14:51:03 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[Description]
We identified a bug in one of the utilities provided by dnsmasq, the 'dhcp_release' utility which
is executed as part of the DHCP lease cleanup mechanism by Neutron once a network resource is freed.
We noticed that some packets were discarded by the DHCP server (dnsmasq) in Ubuntu systems
running a kernel >= 4.7. The reason was the ipi_ifindex field on the pktinfo was incorrectly assumed to be 1 (loopback),
this causes the message to be ignored by the dnsmasq daemon since isn't the interface on which dnsmasq is bind to.
(gdb) p *p.p
$4 = {
ipi_ifindex = 1,
ipi_spec_dst = {
s_addr = 34973888
},
ipi_addr = {
s_addr = 34973888
}
}
(gdb) p ifr
$8 = {ifr_ifrn = {ifrn_name = "lo", '\000' <repeats 13 times>},
[Fix]
Upstream commit:
https://github.com/torvalds/linux/commit/f0c16ba8933ed217c2688b277410b2a37ba81591
[Test Case]
1) Configure a dnsmasq instance to server DHCP
(Example):
$ sudo dnsmasq --no-hosts --no-resolv --strict-order --except-interface=lo --pid-file=/var/lib/neutron/dhcp/860b0cbb-37c3-4bcb-8345-52b942518dca/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/860b0cbb-37c3-4bcb-8345-52b942518dca/host -
-addn-hosts=/var/lib/neutron/dhcp/860b0cbb-37c3-4bcb-8345-52b942518dca/addn_hosts --dhcp-optsfile=/var/lib/neutron/dhcp/860b0cbb-37c3-4bcb-8345-52b942518dca/opts --dhcp-leasefile=/var/lib/neutron/dhcp/860b0cbb-37c3-4bcb-8345-52b942
518dca/leases --dhcp-match=set:ipxe,175 --bind-interfaces --interface=ns-1cb1b7c7-c0 --dhcp-range=set:tag0,192.168.21.0,static,86400s --dhcp-option-force=option:mtu,1458 --dhcp-lease-max=256 --conf-file=/etc/neutron/dnsmasq.conf --
domain=openstacklocal
2) Boot a VM or container on the bridge/interface on which dnsmasq is bind to.
2) Use the dhcp_release utility to release the lease.
(Example):
$ sudo dhcp_release ns-1cb1b7c7-c0 192.168.21.8 fa:16:3e:f3:b2:fe
The expected result: The lease is freed.
Current results: dnsmasq ignored the DHCP Release message.
[Fix]
When we send a packet for our own local address on a non-loopback
interface (e.g. eth0), due to the change had been introduced from
commit 0b922b7 ("net: original ingress device index in PKTINFO"), the
original ingress device index would be set as the loopback interface.
* https://github.com/torvalds/linux/commit/f0c16ba8933ed217c2688b277410b2a37ba81591 |
|
| 2017-04-20 21:12:26 |
Jorge Niedbalski |
linux (Ubuntu Zesty): status |
Triaged |
Fix Committed |
|
| 2017-04-20 21:12:31 |
Jorge Niedbalski |
linux (Ubuntu Yakkety): status |
Triaged |
In Progress |
|
| 2017-04-20 21:12:34 |
Jorge Niedbalski |
linux (Ubuntu Yakkety): assignee |
|
Jorge Niedbalski (niedbalski) |
|
| 2017-04-22 14:10:07 |
Dominique Poulain |
bug |
|
|
added subscriber Dominique Poulain |
| 2017-04-25 18:14:00 |
Thadeu Lima de Souza Cascardo |
linux (Ubuntu Yakkety): status |
In Progress |
Fix Committed |
|
| 2017-04-25 18:41:13 |
Jorge Niedbalski |
linux (Ubuntu Zesty): status |
Fix Committed |
Fix Released |
|
| 2017-04-25 21:03:57 |
Jorge Niedbalski |
bug task added |
|
kolla |
|
| 2017-05-03 16:56:07 |
Kleber Sacilotto de Souza |
tags |
sts yakkety zesty |
sts verification-needed-yakkety yakkety zesty |
|
| 2017-05-05 17:45:57 |
Jorge Niedbalski |
linux (Ubuntu): status |
Triaged |
Fix Released |
|
| 2017-05-05 17:51:52 |
Jorge Niedbalski |
tags |
sts verification-needed-yakkety yakkety zesty |
sts verification-done-yakkety yakkety zesty |
|
| 2017-05-16 10:43:17 |
Launchpad Janitor |
linux (Ubuntu Yakkety): status |
Fix Committed |
Fix Released |
|
| 2017-05-16 10:43:17 |
Launchpad Janitor |
cve linked |
|
2017-7477 |
|
| 2017-08-30 10:28:49 |
Eduardo Gonzalez |
bug task deleted |
kolla |
|
|
