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[Bug 1527902] Re: 3.13.0-71: IPv6 UDP DNS packets are not received
Now I tested also v3.13.11-ckt32-trusty kernel and this is bad.
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3.13.0-71: IPv6 UDP DNS packets are not received
Status in linux package in Ubuntu:
Status in linux-lts-trusty package in Ubuntu:
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
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
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.
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