Greetings, I'm having a similar issue on a kvm hypervisor running Debian Jessie.
It is running a vanilla kernel though, but it started hitting a similar BUG today, after I upgraded from 3.12 to 3.16 series. 3.16.42 seems to be the first affected version. 3.16.41 is working without problems so far. Also I can confirm that Debian kernel 3.16.39-1+deb8u2 works and 3.16.43-1 does have the issue described. I might try and git bisect the kernel, today or tomorrow, unless someone else beats me to it. Side note: the same 3.16.43 vanilla kernel has been working fine on two Wheezy kvm hypervisors for more than a week now. Regards Ingmar
