kernel-packages team mailing list archive

[Pali <pali.rohar@xxxxxxxxx>]

Public bug reported:

After upgrading linux kernel from version 3.13.0-68 to 3.13.0-71 then
Kopete (IM messenger) stopped working, cannot connect to any jabber
server.

I started debugging this problem and found out that, problem resolve
when I boot back 3.13.0-68 kernel version (without touching any system
files or packages). When I boot 3.13.0-71 Kopete always does not
connect.

Next I debugged that problem on 3.13.0-71 is just when /etc/resolv.conf
contains only IPv6 addresses of DNS servers.

Problem is comes down to dns resolver (jabber in Kopete has its own for
SRV records) and syscall recvfrom() (on IPv6 socket) always return error
-EAGAIN without any data returned. But wireshark see that DNS response
was recevied.

So it looks like that after 3.13.0-68 kernel was included some change
which broke receiving UDP packets via IPv6 socket. IPv4 is OK.

** Affects: linux-lts-trusty (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-lts-trusty in Ubuntu.
https://bugs.launchpad.net/bugs/1527902

Title:
  3.13.0-71: IPv6 UDP DNS packets are not received

Status in linux-lts-trusty package in Ubuntu:
  New

Bug description:
  After upgrading linux kernel from version 3.13.0-68 to 3.13.0-71 then
  Kopete (IM messenger) stopped working, cannot connect to any jabber
  server.

  I started debugging this problem and found out that, problem resolve
  when I boot back 3.13.0-68 kernel version (without touching any system
  files or packages). When I boot 3.13.0-71 Kopete always does not
  connect.

  Next I debugged that problem on 3.13.0-71 is just when
  /etc/resolv.conf contains only IPv6 addresses of DNS servers.

  Problem is comes down to dns resolver (jabber in Kopete has its own
  for SRV records) and syscall recvfrom() (on IPv6 socket) always return
  error -EAGAIN without any data returned. But wireshark see that DNS
  response was recevied.

  So it looks like that after 3.13.0-68 kernel was included some change
  which broke receiving UDP packets via IPv6 socket. IPv4 is OK.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1527902/+subscriptions