Security update for xen

Open Source Vulnerabilities SUSE-SU-2015:1042-1

Xen was updated to fix seven security issues and one non-security bug. The following vulnerabilities were fixed: * CVE-2015-4103: Potential unintended writes to host MSI message data field via qemu (XSA-128) (bnc#931625) * CVE-2015-4104: PCI MSI mask bits inadvertently exposed to guests (XSA-129) (bnc#931626) * CVE-2015-4105: Guest triggerable qemu MSI-X pass-through error messages (XSA-130) (bnc#931627) * CVE-2015-4106: Unmediated PCI register access in qemu (XSA-131) (bnc#931628) * CVE-2015-4163: GNTTABOP_swap_grant_ref operation misbehavior (XSA-134) (bnc#932790) * CVE-2015-3209: heap overflow in qemu pcnet controller allowing guest to host escape (XSA-135) (bnc#932770) * CVE-2015-4164: DoS through iret hypercall handler (XSA-136) (bnc#932996) The following non-security bug was fixed: * bnc#906689: let systemd schedule xencommons after network-online.target and remote-fs.target so that xendomains has access to remote shares