NAK Unfortunately no, the 3.13.0-35-generic #62~lp1349768v4v201408220857 from above continues to exhibit the same issues with my actual test setup. Same thing with the ./lp1349768.sh testcase.
The 0041-ipvs-fix-ipv4-issues-in-ip_vs_out.patch in the lp1349768v4 build is a different patch, though? The resulting ftrace that correlates with dnsmasq sendto() getting stuck is still the same: dnsmasq-1447 [000] .... 1272.430975: ipv6_find_hdr <-ip_vs_out_icmp_v6.isra.21 dnsmasq-1447 [000] .... 1272.430983: <stack trace> => ip_vs_out.part.22 => ip_vs_local_reply6 => nf_iterate => nf_hook_slow => __ip_local_out => ip_local_out => ip_send_skb => udp_send_skb => udp_sendmsg => inet_sendmsg => sock_sendmsg => SYSC_sendto => SyS_sendto => tracesys Is there something I can use to confirm that the booted kernel image actually has the correct nf_hook_ops.pf set? The fix seems pretty obvious, so I was expecting it to work... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1349768 Title: kernel 3.13.0-32 ipvs "IPv6 header not found" related to UDP socket sendto() EPERM errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349768/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs