I think that unlike the bug title and description suggest, this bug is not limited to IPv6. I am having the same problem with FreeRADIUS when RADIUS packets are received over IPv4. This problem is fixed by the Kernel from trusty-proposed, too.
Actually, this problem looks a lot like a regression that already appeared in 3.13.0-66 and was fixed in 3.13.0-67 (see bug #1510213 which turned out to be the same problem as tracked in #1508510). So maybe, some measures should be taken to ensure that this regression does not make it into a released kernel again but it is detected during QA. A side note regading the problem with FreeRADIUS: I only had this problem on a multi-core multi-socket machine. On a multi-core single- socket machine, it did not appear, but this might just have been a coincidence. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-utopic in Ubuntu. https://bugs.launchpad.net/bugs/1527902 Title: 3.13.0-71: IPv6 UDP DNS packets are not received Status in linux package in Ubuntu: Fix Released Status in linux-lts-trusty package in Ubuntu: Invalid Status in linux-lts-utopic package in Ubuntu: Fix Committed Status in linux-lts-trusty source package in Precise: In Progress Status in linux source package in Trusty: Fix Committed Status in linux source package in Vivid: Fix Released Status in linux source package in Wily: Fix Released Status in linux source package in Xenial: Fix Released 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/+bug/1527902/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
