I saw a similar crash when running the prepare script with a Saucy64 host, a Saucy32 1rst and Saucy32 2nd level guest. The 1rst level guest cpu set to core2duo and I also had to replace the qemu-system-x86_64 by qemu (which maps to the same arch). Otherwise the 2nd level guest was not started at all.
That would on one run give a double-fault as you had, but the second attempt did succeed. Though both runs had a lot of NMI (reason 21 and 31) messages in them. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1208455 Title: general protection fault running apt-get inside double nested kvm VM Status in “linux” package in Ubuntu: In Progress Status in “qemu-kvm” package in Ubuntu: New Status in “linux” source package in Saucy: In Progress Status in “qemu-kvm” source package in Saucy: New Bug description: Attempting to run apt-get in a nested vm hosted in OpenStack results in a general protection fault in the kernel in the nested VM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1208455/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp