[libvirt-users] ubuntu virsh snapshot-create-as gives Error -22 while writing VM

[Jon Schipp]

Hello all, I'm trying to create an online internal snapshot to work with
Cuckoo Sandbox.
I keep receiving this -22 error below on my Ubuntu system and I'm out of
ideas, been at it for a while so any help is appreciated.

root at cuckoo-sec:~# virsh snapshot-create-as cuckoo cuckoo-snap1 "Cuckoo
Snapshot"
error: operation failed: Error -22 while writing VM

$ uname -a
Linux cuckoo-sec 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04 LTS"

$ kvm --version
QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.9), Copyright (c)
2003-2008 Fabrice Bellard

$ libvirtd --version
libvirtd (libvirt) 1.2.2

$ qemu-img info /opt/kvm/Windows7-64.qcow2
image: /opt/kvm/Windows7-64.qcow2
file format: qcow2
virtual size: 25G (26843545600 bytes)
disk size: 12G
cluster_size: 65536
Format specific information:
    compat: 1.1
    lazy refcounts: false

$ virsh list
 Id    Name                           State
----------------------------------------------------
 17    cuckoo                         running

$ apt-get install apparmor-utils
$ aa-status
$ aa-complain /usr/sbin/libvirtd
$ aa-complain /etc/apparmor.d/libvirt/libvirt-bdfcd0d8-b032-6870-
79bf-c77e0a3c8590

$ strace virsh snapshot-create-as cuckoo cuckoo-snap1 "Cuckoo Snapshot"
...
gettid()                                = 10168
futex(0x7f4726ab8240, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7f4726ab8240, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN (Resource
temporarily unavailable)
futex(0x7f4726ab8240, FUTEX_WAKE_PRIVATE, 1) = 0
gettid()                                = 10168
Thanks
-- 
Jon Schipp,
jonschipp.com, sickbits.net, opennsm.ncsa.illinois.edu
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